diff --git a/addons/account/models/account_analytic_line.py b/addons/account/models/account_analytic_line.py
index 92e3dc6c973..9a7235ac9a0 100644
--- a/addons/account/models/account_analytic_line.py
+++ b/addons/account/models/account_analytic_line.py
@@ -17,7 +17,6 @@ class AccountAnalyticLine(models.Model):
     code = fields.Char(size=8)
     ref = fields.Char(string='Ref.')
 
-    @api.v8
     @api.onchange('product_id', 'product_uom_id', 'unit_amount', 'currency_id')
     def on_change_unit_amount(self):
         if not self.product_id:
diff --git a/addons/account/models/account_move.py b/addons/account/models/account_move.py
index f69db68a67f..1309145169c 100644
--- a/addons/account/models/account_move.py
+++ b/addons/account/models/account_move.py
@@ -2779,7 +2779,6 @@ class AccountMoveLine(models.Model):
     # LOW-LEVEL METHODS
     # -------------------------------------------------------------------------
 
-    @api.model_cr
     def init(self):
         """ change index on partner_id to a multi-column index on (partner_id, ref), the new index will behave in the
             same way when we search on partner_id, with the addition of being optimal when having a query that will
diff --git a/addons/account/report/account_invoice_report.py b/addons/account/report/account_invoice_report.py
index d63c997347f..1ac06b0372d 100644
--- a/addons/account/report/account_invoice_report.py
+++ b/addons/account/report/account_invoice_report.py
@@ -164,7 +164,6 @@ class AccountInvoiceReport(models.Model):
                 COALESCE(partner.country_id, commercial_partner.country_id)
         '''
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self.env.cr, self._table)
         self.env.cr.execute('''
diff --git a/addons/base_automation/models/base_automation.py b/addons/base_automation/models/base_automation.py
index ba754f2fe3e..ea7c204a1a5 100644
--- a/addons/base_automation/models/base_automation.py
+++ b/addons/base_automation/models/base_automation.py
@@ -231,7 +231,6 @@ class BaseAutomation(models.Model):
             )
         return any(differ(field.name) for field in self.trigger_field_ids)
 
-    @api.model_cr
     def _register_hook(self):
         """ Patch models that should trigger action rules based on creation,
             modification, deletion of records and form onchanges.
diff --git a/addons/base_gengo/wizard/base_gengo_translations.py b/addons/base_gengo/wizard/base_gengo_translations.py
index e7f806074b4..b6b2c4966a4 100644
--- a/addons/base_gengo/wizard/base_gengo_translations.py
+++ b/addons/base_gengo/wizard/base_gengo_translations.py
@@ -45,13 +45,11 @@ class BaseGengoTranslations(models.TransientModel):
     sync_limit = fields.Integer("No. of terms to sync", default=20)
     authorized_credentials = fields.Boolean('The private and public keys are valid')
 
-    @api.model_cr
     def init(self):
         icp = self.env['ir.config_parameter'].sudo()
         if not icp.get_param(self.GENGO_KEY):
             icp.set_param(self.GENGO_KEY, str(uuid.uuid4()))
 
-    @api.model_cr
     def get_gengo_key(self):
         icp = self.env['ir.config_parameter'].sudo()
         return icp.get_param(self.GENGO_KEY, default="Undefined")
diff --git a/addons/crm/models/crm_lead.py b/addons/crm/models/crm_lead.py
index 483917ccf92..fab4eef4d45 100644
--- a/addons/crm/models/crm_lead.py
+++ b/addons/crm/models/crm_lead.py
@@ -57,7 +57,6 @@ class Lead(models.Model):
                 'utm.mixin', 'format.address.mixin', 'phone.validation.mixin']
     _primary_email = 'email_from'
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(Lead, self)._auto_init()
         tools.create_index(self._cr, 'crm_lead_create_date_team_id_idx',
@@ -146,7 +145,6 @@ class Lead(models.Model):
         ('check_probability', 'check(probability >= 0 and probability <= 100)', 'The probability of closing the deal should be between 0% and 100%!')
     ]
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(Lead, self)._auto_init()
         tools.create_index(self._cr, 'crm_lead_user_id_team_id_type_index',
diff --git a/addons/crm/report/crm_activity_report.py b/addons/crm/report/crm_activity_report.py
index 55742b22623..554b49a3290 100644
--- a/addons/crm/report/crm_activity_report.py
+++ b/addons/crm/report/crm_activity_report.py
@@ -75,7 +75,6 @@ class ActivityReport(models.Model):
                 m.model = 'crm.lead' AND (m.mail_activity_type_id IS NOT NULL OR m.subtype_id = %s)
         """ % (disccusion_subtype.id,)
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self._cr, self._table)
         self._cr.execute("""
diff --git a/addons/crm_iap_lead_website/models/crm_reveal_view.py b/addons/crm_iap_lead_website/models/crm_reveal_view.py
index fb0705adcdc..a8a7dd14a7c 100644
--- a/addons/crm_iap_lead_website/models/crm_reveal_view.py
+++ b/addons/crm_iap_lead_website/models/crm_reveal_view.py
@@ -17,7 +17,6 @@ class CRMRevealView(models.Model):
     reveal_state = fields.Selection([('to_process', 'To Process'), ('not_found', 'Not Found')], default='to_process', string="State", index=True)
     create_date = fields.Datetime(index=True)
 
-    @api.model_cr
     def init(self):
         self._cr.execute('SELECT indexname FROM pg_indexes WHERE indexname = %s', ('crm_reveal_view_ip_rule_id',))
         if not self._cr.fetchone():
diff --git a/addons/hr/models/hr_employee_public.py b/addons/hr/models/hr_employee_public.py
index 82799661d0e..1f7af77dfb9 100644
--- a/addons/hr/models/hr_employee_public.py
+++ b/addons/hr/models/hr_employee_public.py
@@ -49,7 +49,6 @@ class HrEmployeePublic(models.Model):
     def _get_fields(self):
         return ','.join('emp.%s' % name for name, field in self._fields.items() if field.store and field.type not in ['many2many', 'one2many'])
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self.env.cr, self._table)
         self.env.cr.execute("""CREATE or REPLACE VIEW %s as (
diff --git a/addons/hr_holidays/models/hr_leave.py b/addons/hr_holidays/models/hr_leave.py
index f4223cdddeb..12c44f26cb4 100644
--- a/addons/hr_holidays/models/hr_leave.py
+++ b/addons/hr_holidays/models/hr_leave.py
@@ -252,7 +252,6 @@ class HolidaysRequest(models.Model):
         ('duration_check', "CHECK ( number_of_days >= 0 )", "If you want to change the number of days you should use the 'period' mode"),
     ]
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(HolidaysRequest, self)._auto_init()
         tools.create_index(self._cr, 'hr_leave_date_to_date_from_index',
diff --git a/addons/hr_timesheet_attendance/report/hr_timesheet_attendance_report.py b/addons/hr_timesheet_attendance/report/hr_timesheet_attendance_report.py
index 0aa0bbaf275..7081a1ac5af 100644
--- a/addons/hr_timesheet_attendance/report/hr_timesheet_attendance_report.py
+++ b/addons/hr_timesheet_attendance/report/hr_timesheet_attendance_report.py
@@ -15,7 +15,6 @@ class TimesheetAttendance(models.Model):
     total_attendance = fields.Float()
     total_difference = fields.Float()
 
-    @api.model_cr
     def init(self):
         self._cr.execute("""CREATE OR REPLACE VIEW %s AS (
             SELECT
diff --git a/addons/im_livechat/report/im_livechat_report_channel.py b/addons/im_livechat/report/im_livechat_report_channel.py
index 21305ab7b99..70b1fc1d30f 100644
--- a/addons/im_livechat/report/im_livechat_report_channel.py
+++ b/addons/im_livechat/report/im_livechat_report_channel.py
@@ -38,7 +38,6 @@ class ImLivechatReportChannel(models.Model):
     is_unrated = fields.Integer('Session not rated', readonly=True)
     partner_id = fields.Many2one('res.partner', 'Operator', readonly=True)
 
-    @api.model_cr
     def init(self):
         # Note : start_date_hour must be remove when the read_group will allow grouping on the hour of a datetime. Don't forget to change the view !
         tools.drop_view_if_exists(self.env.cr, 'im_livechat_report_channel')
diff --git a/addons/im_livechat/report/im_livechat_report_operator.py b/addons/im_livechat/report/im_livechat_report_operator.py
index a9391e2a6be..cafaf898da2 100644
--- a/addons/im_livechat/report/im_livechat_report_operator.py
+++ b/addons/im_livechat/report/im_livechat_report_operator.py
@@ -20,7 +20,6 @@ class ImLivechatReportOperator(models.Model):
     time_to_answer = fields.Float('Time to answer', digits=(16, 2), readonly=True, group_operator="avg", help="Average time to give the first answer to the visitor")
     duration = fields.Float('Average duration', digits=(16, 2), readonly=True, group_operator="avg", help="Duration of the conversation (in seconds)")
 
-    @api.model_cr
     def init(self):
         # Note : start_date_hour must be remove when the read_group will allow grouping on the hour of a datetime. Don't forget to change the view !
         tools.drop_view_if_exists(self.env.cr, 'im_livechat_report_operator')
diff --git a/addons/l10n_in/report/account_invoice_report.py b/addons/l10n_in/report/account_invoice_report.py
index ebbee57ab68..d33d1927e78 100644
--- a/addons/l10n_in/report/account_invoice_report.py
+++ b/addons/l10n_in/report/account_invoice_report.py
@@ -302,7 +302,6 @@ class L10nInAccountInvoiceReport(models.Model):
         """
         return group_by_str
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self.env.cr, self._table)
         self.env.cr.execute("""CREATE or REPLACE VIEW %s AS (
diff --git a/addons/l10n_in/report/account_payment_report.py b/addons/l10n_in/report/account_payment_report.py
index 266d8f39c43..05aed203314 100644
--- a/addons/l10n_in/report/account_payment_report.py
+++ b/addons/l10n_in/report/account_payment_report.py
@@ -101,7 +101,6 @@ class L10nInPaymentReport(models.AbstractModel):
             AND tax.tax_group_id in (SELECT res_id FROM ir_model_data WHERE module='l10n_in' AND name in ('igst_group','gst_group'))
             AND ac.internal_type IN ('receivable', 'payable') AND am.state = 'posted'"""
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self.env.cr, self._table)
         self.env.cr.execute("""CREATE or REPLACE VIEW %s AS (
diff --git a/addons/l10n_in/report/exempted_gst_report.py b/addons/l10n_in/report/exempted_gst_report.py
index 05d68a39ded..435b58e05cf 100644
--- a/addons/l10n_in/report/exempted_gst_report.py
+++ b/addons/l10n_in/report/exempted_gst_report.py
@@ -89,7 +89,6 @@ class L10nInExemptedReport(models.Model):
         """
         return from_str
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self.env.cr, self._table)
         self._cr.execute("""CREATE OR REPLACE VIEW %s AS (%s %s)""" % (
diff --git a/addons/l10n_in/report/hsn_gst_report.py b/addons/l10n_in/report/hsn_gst_report.py
index 0fb4a844a74..7961ddda02b 100644
--- a/addons/l10n_in/report/hsn_gst_report.py
+++ b/addons/l10n_in/report/hsn_gst_report.py
@@ -98,7 +98,6 @@ class L10nInProductHsnReport(models.Model):
         """
         return from_str
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self.env.cr, self._table)
         self.env.cr.execute("""CREATE OR REPLACE VIEW %s AS (%s %s)""" % (
diff --git a/addons/mail/models/mail_alias.py b/addons/mail/models/mail_alias.py
index 77bdc216728..ecf03c3c5a3 100644
--- a/addons/mail/models/mail_alias.py
+++ b/addons/mail/models/mail_alias.py
@@ -220,7 +220,6 @@ class AliasMixin(models.AbstractModel):
         aliases.unlink()
         return res
 
-    @api.model_cr_context
     def _init_column(self, name):
         """ Create aliases for existing rows. """
         super(AliasMixin, self)._init_column(name)
diff --git a/addons/mail/models/mail_channel.py b/addons/mail/models/mail_channel.py
index 524f3763d93..7912a856ca4 100644
--- a/addons/mail/models/mail_channel.py
+++ b/addons/mail/models/mail_channel.py
@@ -410,7 +410,6 @@ class Channel(models.Model):
             return True
         return super(Channel, self)._alias_check_contact(message, message_dict, alias)
 
-    @api.model_cr
     def init(self):
         self._cr.execute('SELECT indexname FROM pg_indexes WHERE indexname = %s', ('mail_channel_partner_seen_message_id_idx',))
         if not self._cr.fetchone():
diff --git a/addons/mail/models/mail_message.py b/addons/mail/models/mail_message.py
index 1b9e8b41fa4..e90249e9533 100644
--- a/addons/mail/models/mail_message.py
+++ b/addons/mail/models/mail_message.py
@@ -585,7 +585,6 @@ class Message(models.Model):
     # mail_message internals
     #------------------------------------------------------
 
-    @api.model_cr
     def init(self):
         self._cr.execute("""SELECT indexname FROM pg_indexes WHERE indexname = 'mail_message_model_res_id_idx'""")
         if not self._cr.fetchone():
diff --git a/addons/mail/models/mail_notification.py b/addons/mail/models/mail_notification.py
index b687633a86d..3397342a818 100644
--- a/addons/mail/models/mail_notification.py
+++ b/addons/mail/models/mail_notification.py
@@ -37,7 +37,6 @@ class Notification(models.Model):
             ], string='Failure type')
     failure_reason = fields.Text('Failure reason', copy=False)
 
-    @api.model_cr
     def init(self):
         self._cr.execute('SELECT indexname FROM pg_indexes WHERE indexname = %s', ('mail_notification_res_partner_id_is_read_email_status_mail_message_id',))
         if not self._cr.fetchone():
diff --git a/addons/mail/wizard/mail_compose_message.py b/addons/mail/wizard/mail_compose_message.py
index f5ad45c0a56..e88c11cbc84 100644
--- a/addons/mail/wizard/mail_compose_message.py
+++ b/addons/mail/wizard/mail_compose_message.py
@@ -430,9 +430,6 @@ class MailComposer(models.TransientModel):
             values['body'] = values.pop('body_html')
 
         # This onchange should return command instead of ids for x2many field.
-        # ORM handle the assignation of command list on new onchange (api.v8),
-        # this force the complete replacement of x2many field with
-        # command and is compatible with onchange api.v7
         values = self._convert_to_write(values)
 
         return {'value': values}
diff --git a/addons/mass_mailing/models/mass_mailing_report.py b/addons/mass_mailing/models/mass_mailing_report.py
index 13f8c873d6e..de63344389c 100644
--- a/addons/mass_mailing/models/mass_mailing_report.py
+++ b/addons/mass_mailing/models/mass_mailing_report.py
@@ -22,7 +22,6 @@ class MassMailingReport(models.Model):
         string='Status', readonly=True)
     email_from = fields.Char('From', readonly=True)
 
-    @api.model_cr
     def init(self):
         """Mass Mail Statistical Report: based on mail.mail.statistics that models the various
         statistics collected for each mailing, and mail.mass_mailing model that models the
diff --git a/addons/membership/report/report_membership.py b/addons/membership/report/report_membership.py
index 1734bc045f5..bab4b67a7b1 100644
--- a/addons/membership/report/report_membership.py
+++ b/addons/membership/report/report_membership.py
@@ -37,7 +37,6 @@ class ReportMembership(models.Model):
     company_id = fields.Many2one('res.company', string='Company', readonly=True)
     quantity = fields.Integer(readonly=True)
 
-    @api.model_cr
     def init(self):
         '''Create the view'''
         tools.drop_view_if_exists(self._cr, self._table)
diff --git a/addons/point_of_sale/report/pos_order_report.py b/addons/point_of_sale/report/pos_order_report.py
index 3111dc7fd3c..33684c818c7 100644
--- a/addons/point_of_sale/report/pos_order_report.py
+++ b/addons/point_of_sale/report/pos_order_report.py
@@ -94,7 +94,6 @@ class PosOrderReport(models.Model):
                 SUM(l.qty * u.factor) != 0
         """
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self._cr, self._table)
         self._cr.execute("""
diff --git a/addons/purchase/report/purchase_bill.py b/addons/purchase/report/purchase_bill.py
index 0a9609144b8..8517cc6ad5b 100644
--- a/addons/purchase/report/purchase_bill.py
+++ b/addons/purchase/report/purchase_bill.py
@@ -20,7 +20,6 @@ class PurchaseBillUnion(models.Model):
     vendor_bill_id = fields.Many2one('account.move', string='Vendor Bill', readonly=True)
     purchase_order_id = fields.Many2one('purchase.order', string='Purchase Order', readonly=True)
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self.env.cr, 'purchase_bill_union')
         self.env.cr.execute("""
diff --git a/addons/purchase/report/purchase_report.py b/addons/purchase/report/purchase_report.py
index d3a04e7d06e..1385d7c12bd 100644
--- a/addons/purchase/report/purchase_report.py
+++ b/addons/purchase/report/purchase_report.py
@@ -50,7 +50,6 @@ class PurchaseReport(models.Model):
     qty_billed = fields.Float('Qty Billed', readonly=True)
     qty_to_be_billed = fields.Float('Qty to be Billed', readonly=True)
 
-    @api.model_cr
     def init(self):
         # self._table = sale_report
         tools.drop_view_if_exists(self.env.cr, self._table)
diff --git a/addons/sale/report/report_all_channels_sales.py b/addons/sale/report/report_all_channels_sales.py
index 473ab1f1362..1aa6e96006d 100644
--- a/addons/sale/report/report_all_channels_sales.py
+++ b/addons/sale/report/report_all_channels_sales.py
@@ -82,7 +82,6 @@ class PosSaleReport(models.Model):
                 AS foo""" % (self._table, self._from())
         return request
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self.env.cr, self._table)
         self.env.cr.execute(self.get_main_request())
diff --git a/addons/sale/report/sale_report.py b/addons/sale/report/sale_report.py
index 4936a9401ed..e1fa1ce8620 100644
--- a/addons/sale/report/sale_report.py
+++ b/addons/sale/report/sale_report.py
@@ -144,7 +144,6 @@ class SaleReport(models.Model):
 
         return '%s (SELECT %s FROM %s WHERE l.product_id IS NOT NULL GROUP BY %s)' % (with_, select_, from_, groupby_)
 
-    @api.model_cr
     def init(self):
         # self._table = sale_report
         tools.drop_view_if_exists(self.env.cr, self._table)
diff --git a/addons/stock/models/stock_move.py b/addons/stock/models/stock_move.py
index 531324a45c0..14e62ac4e58 100644
--- a/addons/stock/models/stock_move.py
+++ b/addons/stock/models/stock_move.py
@@ -354,7 +354,6 @@ class StockMove(models.Model):
             user_warning += _('\n\nBlocking: %s') % ' ,'.join(moves_error.mapped('name'))
             raise UserError(user_warning)
 
-    @api.model_cr
     def init(self):
         self._cr.execute('SELECT indexname FROM pg_indexes WHERE indexname = %s', ('stock_move_product_location_index',))
         if not self._cr.fetchone():
diff --git a/addons/stock/report/report_stock_forecast.py b/addons/stock/report/report_stock_forecast.py
index 1bf69ab5719..b3cca6a6ecb 100644
--- a/addons/stock/report/report_stock_forecast.py
+++ b/addons/stock/report/report_stock_forecast.py
@@ -17,7 +17,6 @@ class ReportStockForecat(models.Model):
     picking_id = fields.Many2one('stock.picking', string='Picking', readonly=True)
     reference = fields.Char('Reference')
 
-    @api.model_cr
     def init(self):
         tools.drop_view_if_exists(self._cr, 'report_stock_forecast')
         query = """
diff --git a/addons/website/models/res_users.py b/addons/website/models/res_users.py
index 8902e4c34b6..c5fb684888c 100644
--- a/addons/website/models/res_users.py
+++ b/addons/website/models/res_users.py
@@ -47,7 +47,6 @@ class ResUsers(models.Model):
         current_website = self.env['website'].get_current_website()
         return current_website.auth_signup_uninvited or super(ResUsers, self)._get_signup_invitation_scope()
 
-    @api.model_cr_context
     def _auto_init(self):
         result = super(ResUsers, self)._auto_init()
         # Use unique index to implement unique constraint per website, even if website_id is null
diff --git a/addons/website_crm_partner_assign/report/crm_partner_report.py b/addons/website_crm_partner_assign/report/crm_partner_report.py
index d78f1b1dd67..05043f7b313 100644
--- a/addons/website_crm_partner_assign/report/crm_partner_report.py
+++ b/addons/website_crm_partner_assign/report/crm_partner_report.py
@@ -30,7 +30,6 @@ class CrmPartnerReportAssign(models.Model):
                         'grade_id', 'parent_id', 'team_id', 'user_id'],
     }
 
-    @api.model_cr
     def init(self):
         """
             CRM Lead Report
diff --git a/addons/website_event_questions/report/report_event_registrations_questions.py b/addons/website_event_questions/report/report_event_registrations_questions.py
index 8d229c55469..6bbd52d043f 100644
--- a/addons/website_event_questions/report/report_event_registrations_questions.py
+++ b/addons/website_event_questions/report/report_event_registrations_questions.py
@@ -14,7 +14,6 @@ class ReportEventRegistrationQuestions(models.Model):
     answer_id = fields.Many2one(comodel_name='event.answer', string='Answer')
     event_id = fields.Many2one(comodel_name='event.event', string='Event')
 
-    @api.model_cr
     def init(self):
         """ Event Question main report """
         tools.drop_view_if_exists(self._cr, 'event_question_report')
diff --git a/addons/website_form/models/models.py b/addons/website_form/models/models.py
index 8f7f148de75..c3755143daa 100644
--- a/addons/website_form/models/models.py
+++ b/addons/website_form/models/models.py
@@ -79,7 +79,6 @@ class website_form_model_fields(models.Model):
     _description = 'Fields'
     _inherit = 'ir.model.fields'
 
-    @api.model_cr
     def init(self):
         # set all existing unset website_form_blacklisted fields to ``true``
         #  (so that we can use it as a whitelist rather than a blacklist)
diff --git a/addons/website_slides/models/slide_channel.py b/addons/website_slides/models/slide_channel.py
index c157f692599..d3614c4a845 100644
--- a/addons/website_slides/models/slide_channel.py
+++ b/addons/website_slides/models/slide_channel.py
@@ -294,7 +294,6 @@ class Channel(models.Model):
     # ORM Overrides
     # ---------------------------------------------------------
 
-    @api.model_cr_context
     def _init_column(self, column_name):
         """ Initialize the value of the given column for existing rows.
             Overridden here because we need to generate different access tokens
diff --git a/doc/reference/orm.rst b/doc/reference/orm.rst
index f0c0452c8d5..20440d5c414 100644
--- a/doc/reference/orm.rst
+++ b/doc/reference/orm.rst
@@ -1205,20 +1205,6 @@ Porting from the old API to the new API
   :attr:`~odoo.models.Model.write_date` fields: they are now created as
   regular "legitimate" fields, and can be read and written like any other
   field out-of-the-box
-* when straight conversion is impossible (semantics can not be bridged) or the
-  "old API" version is not desirable and could be improved for the new API, it
-  is possible to use completely different "old API" and "new API"
-  implementations for the same method name using :func:`~odoo.api.v7` and
-  :func:`~odoo.api.v8`. The method should first be defined using the
-  old-API style and decorated with :func:`~odoo.api.v7`, it should then be
-  re-defined using the exact same name but the new-API style and decorated
-  with :func:`~odoo.api.v8`. Calls from an old-API context will be
-  dispatched to the first implementation and calls from a new-API context will
-  be dispatched to the second implementation. One implementation can call (and
-  frequently does) call the other by switching context.
-
-  .. danger:: using these decorators makes methods extremely difficult to
-              override and harder to understand and document
 * uses of :attr:`~odoo.models.Model._columns` or
   :attr:`~odoo.models.Model._all_columns` should be replaced by
   :attr:`~odoo.models.Model._fields`, which provides access to instances of
@@ -1277,28 +1263,3 @@ decorating the old-style method:
 * disabling it entirely, by decorating a method with
   :func:`~odoo.api.noguess` there will be no bridging and methods will be
   called the exact same way from the new and old API styles
-* defining the bridge explicitly, this is mostly for methods which are matched
-  incorrectly (because parameters are named in unexpected ways):
-
-  :func:`~odoo.api.cr`
-     will automatically prepend the current cursor to explicitly provided
-     parameters, positionally
-  :func:`~odoo.api.cr_uid`
-     will automatically prepend the current cursor and user's id to explictly
-     provided parameters
-  :func:`~odoo.api.cr_uid_ids`
-     will automatically prepend the current cursor, user's id and recordset's
-     ids to explicitly provided parameters
-  :func:`~odoo.api.cr_uid_id`
-     will loop over the current recordset and call the method once for each
-     record, prepending the current cursor, user's id and record's id to
-     explicitly provided parameters.
-
-     .. danger:: the result of this wrapper is *always a list* when calling
-                 from a new-API context
-
-  All of these methods have a ``_context``-suffixed version
-  (e.g. :func:`~odoo.api.cr_uid_context`) which also passes the current
-  context *by keyword*.
-* dual implementations using :func:`~odoo.api.v7` and
-  :func:`~odoo.api.v8` will be ignored as they provide their own "bridging"
diff --git a/odoo/addons/base/models/decimal_precision.py b/odoo/addons/base/models/decimal_precision.py
index 9d1e67a22b3..dec400b1328 100644
--- a/odoo/addons/base/models/decimal_precision.py
+++ b/odoo/addons/base/models/decimal_precision.py
@@ -32,11 +32,6 @@ class DecimalPrecision(models.Model):
         res = self.env.cr.fetchone()
         return res[0] if res else 2
 
-    @api.model_cr
-    def clear_cache(self):
-        """ Deprecated, use `clear_caches` instead. """
-        self.clear_caches()
-
     @api.model_create_multi
     def create(self, vals_list):
         res = super(DecimalPrecision, self).create(vals_list)
diff --git a/odoo/addons/base/models/ir_actions.py b/odoo/addons/base/models/ir_actions.py
index 94d1abbd940..66d11d4bd6e 100644
--- a/odoo/addons/base/models/ir_actions.py
+++ b/odoo/addons/base/models/ir_actions.py
@@ -283,7 +283,6 @@ class IrActionsActWindowView(models.Model):
     act_window_id = fields.Many2one('ir.actions.act_window', string='Action', ondelete='cascade')
     multi = fields.Boolean(string='On Multiple Doc.', help="If set to true, the action will not be displayed on the right toolbar of a form view.")
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(IrActionsActWindowView, self)._auto_init()
         tools.create_unique_index(self._cr, 'act_window_view_unique_mode_per_action',
diff --git a/odoo/addons/base/models/ir_actions_report.py b/odoo/addons/base/models/ir_actions_report.py
index 51ef9b9e32b..22807bdb6a0 100644
--- a/odoo/addons/base/models/ir_actions_report.py
+++ b/odoo/addons/base/models/ir_actions_report.py
@@ -765,7 +765,6 @@ class IrActionsReport(models.Model):
             return None
         return render_func(res_ids, data=data)
 
-    @api.noguess
     def report_action(self, docids, data=None, config=True):
         """Return an action of type ir.actions.report.
 
diff --git a/odoo/addons/base/models/ir_attachment.py b/odoo/addons/base/models/ir_attachment.py
index 734be5f88e9..8b191edb210 100644
--- a/odoo/addons/base/models/ir_attachment.py
+++ b/odoo/addons/base/models/ir_attachment.py
@@ -300,7 +300,6 @@ class IrAttachment(models.Model):
     mimetype = fields.Char('Mime Type', readonly=True)
     index_content = fields.Text('Indexed Content', readonly=True, prefetch=False)
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(IrAttachment, self)._auto_init()
         tools.create_index(self._cr, 'ir_attachment_res_idx',
diff --git a/odoo/addons/base/models/ir_config_parameter.py b/odoo/addons/base/models/ir_config_parameter.py
index 75be28c9359..32e7a838854 100644
--- a/odoo/addons/base/models/ir_config_parameter.py
+++ b/odoo/addons/base/models/ir_config_parameter.py
@@ -39,7 +39,6 @@ class IrConfigParameter(models.Model):
         ('key_uniq', 'unique (key)', 'Key must be unique.')
     ]
 
-    @api.model_cr
     @mute_logger('odoo.addons.base.models.ir_config_parameter')
     def init(self, force=False):
         """
diff --git a/odoo/addons/base/models/ir_filters.py b/odoo/addons/base/models/ir_filters.py
index 547302be38b..75845870224 100644
--- a/odoo/addons/base/models/ir_filters.py
+++ b/odoo/addons/base/models/ir_filters.py
@@ -150,7 +150,6 @@ class IrFilters(models.Model):
         ('name_model_uid_unique', 'unique (name, model_id, user_id, action_id)', 'Filter names must be unique'),
     ]
 
-    @api.model_cr_context
     def _auto_init(self):
         result = super(IrFilters, self)._auto_init()
         # Use unique index to implement unique constraint on the lowercase name (not possible using a constraint)
diff --git a/odoo/addons/base/models/ir_logging.py b/odoo/addons/base/models/ir_logging.py
index 30fcaf3bd1d..567b95264d2 100644
--- a/odoo/addons/base/models/ir_logging.py
+++ b/odoo/addons/base/models/ir_logging.py
@@ -32,7 +32,6 @@ class IrLogging(models.Model):
     func = fields.Char(string='Function', required=True)
     line = fields.Char(required=True)
 
-    @api.model_cr
     def init(self):
         super(IrLogging, self).init()
         self._cr.execute("select 1 from information_schema.constraint_column_usage where table_name = 'ir_logging' and constraint_name = 'ir_logging_write_uid_fkey'")
diff --git a/odoo/addons/base/models/ir_model.py b/odoo/addons/base/models/ir_model.py
index a0337f85182..269091f2843 100644
--- a/odoo/addons/base/models/ir_model.py
+++ b/odoo/addons/base/models/ir_model.py
@@ -1191,7 +1191,7 @@ class IrModelAccess(models.Model):
         self._cr.execute(query, (model_name, tuple(group_ids)))
         return bool(self._cr.rowcount)
 
-    @api.model_cr
+    @api.model
     def group_names_with_access(self, model_name, access_mode):
         """ Return the names of visible groups which have been granted
             ``access_mode`` on the model ``model_name``.
@@ -1288,7 +1288,7 @@ class IrModelAccess(models.Model):
     def unregister_cache_clearing_method(cls, model, method):
         cls.__cache_clearing_methods.discard((model, method))
 
-    @api.model_cr
+    @api.model
     def call_cache_clearing_methods(self):
         self.invalidate_cache()
         self.check.clear_cache(self)    # clear the cache of check function
@@ -1352,7 +1352,6 @@ class IrModelData(models.Model):
         for res in self:
             res.reference = "%s,%s" % (res.model, res.res_id)
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(IrModelData, self)._auto_init()
         tools.create_unique_index(self._cr, 'ir_model_data_module_name_uniq_index',
diff --git a/odoo/addons/base/models/ir_translation.py b/odoo/addons/base/models/ir_translation.py
index 373e5f5e8b0..b4fcfc1481f 100644
--- a/odoo/addons/base/models/ir_translation.py
+++ b/odoo/addons/base/models/ir_translation.py
@@ -247,7 +247,6 @@ class IrTranslation(models.Model):
         ''' the source term is stored on 'src' field '''
         return [('src', operator, value)]
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(IrTranslation, self)._auto_init()
         # Add separate md5 index on src (no size limit on values, and good performance).
@@ -759,7 +758,6 @@ class IrTranslation(models.Model):
         """ Return a cursor-like object for fast inserting translations """
         return IrTranslationImport(self)
 
-    @api.model_cr_context
     def load_module_terms(self, modules, langs):
         """ Load PO files of the given modules for the given languages. """
         # make sure the given languages are active
diff --git a/odoo/addons/base/models/ir_ui_view.py b/odoo/addons/base/models/ir_ui_view.py
index 622f4de1645..8a8d88bc17a 100644
--- a/odoo/addons/base/models/ir_ui_view.py
+++ b/odoo/addons/base/models/ir_ui_view.py
@@ -101,7 +101,6 @@ class ViewCustom(models.Model):
             return self.browse(view_ids).name_get()
         return super(ViewCustom, self)._name_search(name, args=args, operator=operator, limit=limit, name_get_uid=name_get_uid)
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(ViewCustom, self)._auto_init()
         tools.create_index(self._cr, 'ir_ui_view_custom_user_id_ref_id',
@@ -408,7 +407,6 @@ actual arch.
          "Invalid key: QWeb view should have a key"),
     ]
 
-    @api.model_cr_context
     def _auto_init(self):
         res = super(View, self)._auto_init()
         tools.create_index(self._cr, 'ir_ui_view_model_type_inherit_id',
diff --git a/odoo/addons/base/models/res_company.py b/odoo/addons/base/models/res_company.py
index 2b69228c655..fb9146aea6b 100644
--- a/odoo/addons/base/models/res_company.py
+++ b/odoo/addons/base/models/res_company.py
@@ -102,7 +102,6 @@ class Company(models.Model):
     ]
 
 
-    @api.model_cr
     def init(self):
         for company in self.search([('paperformat_id', '=', False)]):
             paperformat_euro = self.env.ref('base.paperformat_euro', False)
diff --git a/odoo/addons/base/models/res_config.py b/odoo/addons/base/models/res_config.py
index e5b584a5768..b8617a09d5a 100644
--- a/odoo/addons/base/models/res_config.py
+++ b/odoo/addons/base/models/res_config.py
@@ -695,7 +695,7 @@ class ResConfigSettings(models.TransientModel, ResConfigModuleInstallationMixin)
         model_name, field_name = full_field_name.rsplit('.', 1)
         return self.env[model_name].fields_get([field_name])[field_name]['string']
 
-    @api.model_cr_context
+    @api.model
     def get_config_warning(self, msg):
         """
         Helper: return a Warning exception with the given message where the %(field:xxx)s
diff --git a/odoo/addons/base/models/res_lang.py b/odoo/addons/base/models/res_lang.py
index 9e37a5b7963..6fcd82354b6 100644
--- a/odoo/addons/base/models/res_lang.py
+++ b/odoo/addons/base/models/res_lang.py
@@ -82,7 +82,6 @@ class Lang(models.Model):
             except Exception:
                 raise ValidationError(warning)
 
-    @api.model_cr
     def _register_hook(self):
         # check that there is at least one active language
         if not self.search_count([]):
diff --git a/odoo/addons/base/models/res_partner.py b/odoo/addons/base/models/res_partner.py
index 1fdcd5afe5b..d6677b972ac 100644
--- a/odoo/addons/base/models/res_partner.py
+++ b/odoo/addons/base/models/res_partner.py
@@ -241,7 +241,6 @@ class Partner(models.Model):
         ('check_name', "CHECK( (type='contact' AND name IS NOT NULL) or (type!='contact') )", 'Contacts require a name.'),
     ]
 
-    @api.model_cr
     def init(self):
         self._cr.execute("""SELECT indexname FROM pg_indexes WHERE indexname = 'res_partner_vat_index'""")
         if not self._cr.fetchone():
diff --git a/odoo/addons/test_performance/models/models.py b/odoo/addons/test_performance/models/models.py
index f1c51453b47..5874d0a784e 100644
--- a/odoo/addons/test_performance/models/models.py
+++ b/odoo/addons/test_performance/models/models.py
@@ -35,7 +35,6 @@ class LineModel(models.Model):
     base_id = fields.Many2one('test_performance.base', required=True, ondelete='cascade')
     value = fields.Integer()
 
-    @api.model_cr
     def init(self):
         # line values should be unique per "base" - useful for testing corner cases with unique lines
         tools.create_unique_index(self._cr, 'test_performance_line_uniq', self._table, ['base_id', 'value'])
diff --git a/odoo/api.py b/odoo/api.py
index 99fcdcaa6e2..ab96c9f64fd 100644
--- a/odoo/api.py
+++ b/odoo/api.py
@@ -33,14 +33,8 @@
 
 __all__ = [
     'Environment',
-    'Meta', 'guess', 'noguess',
+    'Meta',
     'model', 'multi',
-    'model_cr', 'model_cr_context',
-    'cr', 'cr_context',
-    'cr_uid', 'cr_uid_context',
-    'cr_uid_id', 'cr_uid_id_context',
-    'cr_uid_ids', 'cr_uid_ids_context',
-    'cr_uid_records', 'cr_uid_records_context',
     'constrains', 'depends', 'onchange', 'returns',
     'call_kw',
 ]
@@ -48,7 +42,7 @@ __all__ = [
 import logging
 from collections import defaultdict, Mapping
 from contextlib import contextmanager
-from inspect import currentframe, getargspec
+from inspect import getargspec
 from pprint import pformat
 from weakref import WeakSet
 
@@ -69,12 +63,8 @@ _logger = logging.getLogger(__name__)
 #
 # On wrapping method only:
 #  - method._api: decorator function, used for re-applying decorator
-#  - method._orig: original method
 #
 
-WRAPPED_ATTRS = ('__module__', '__name__', '__doc__', '_constrains',
-                 '_depends', '_onchange', '_returns', 'clear_cache')
-
 INHERITED_ATTRS = ('_returns',)
 
 
@@ -82,6 +72,7 @@ class Params(object):
     def __init__(self, args, kwargs):
         self.args = args
         self.kwargs = kwargs
+
     def __str__(self):
         params = []
         for arg in self.args:
@@ -106,13 +97,6 @@ class Meta(type):
                 # make the method inherit from decorators
                 value = propagate(getattr(parent, key, None), value)
 
-                # guess calling convention if none is given
-                if not hasattr(value, '_api'):
-                    try:
-                        value = guess(value)
-                    except TypeError:
-                        pass
-
                 if (getattr(value, '_api', None) or '').startswith('cr'):
                     _logger.warning("Deprecated method %s.%s in module %s", name, key, attrs.get('__module__'))
 
@@ -324,50 +308,6 @@ def multi(method):
     return method
 
 
-def model_cr(method):
-    """ Decorate a record-style method where ``self`` is a recordset, but its
-        contents is not relevant, only the model is. Such a method::
-
-            @api.model_cr
-            def method(self, args):
-                ...
-
-        may be called in both record and traditional styles, like::
-
-            # recs = model.browse(cr, uid, ids, context)
-            recs.method(args)
-
-            model.method(cr, args)
-
-        Notice that no ``uid``, ``ids``, ``context`` are passed to the method in
-        the traditional style.
-    """
-    method._api = 'model_cr'
-    return method
-
-
-def model_cr_context(method):
-    """ Decorate a record-style method where ``self`` is a recordset, but its
-        contents is not relevant, only the model is. Such a method::
-
-            @api.model_cr_context
-            def method(self, args):
-                ...
-
-        may be called in both record and traditional styles, like::
-
-            # recs = model.browse(cr, uid, ids, context)
-            recs.method(args)
-
-            model.method(cr, args, context=context)
-
-        Notice that no ``uid``, ``ids`` are passed to the method in the
-        traditional style.
-    """
-    method._api = 'model_cr_context'
-    return method
-
-
 _create_logger = logging.getLogger(__name__ + '.create')
 
 
@@ -412,252 +352,6 @@ def model_create_multi(method):
     return wrapper
 
 
-def cr(method):
-    """ Decorate a traditional-style method that takes ``cr`` as a parameter.
-        Such a method may be called in both record and traditional styles, like::
-
-            # recs = model.browse(cr, uid, ids, context)
-            recs.method(args)
-
-            model.method(cr, args)
-    """
-    method._api = 'cr'
-    return method
-
-
-def cr_context(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``context`` as parameters. """
-    method._api = 'cr_context'
-    return method
-
-
-def cr_uid(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``uid`` as parameters. """
-    method._api = 'cr_uid'
-    return method
-
-
-def cr_uid_context(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``uid``, ``context`` as
-        parameters. Such a method may be called in both record and traditional
-        styles, like::
-
-            # recs = model.browse(cr, uid, ids, context)
-            recs.method(args)
-
-            model.method(cr, uid, args, context=context)
-    """
-    method._api = 'cr_uid_context'
-    return method
-
-
-def cr_uid_id(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``uid``, ``id`` as
-        parameters. Such a method may be called in both record and traditional
-        styles. In the record style, the method automatically loops on records.
-    """
-    method._api = 'cr_uid_id'
-    return method
-
-
-def cr_uid_id_context(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``uid``, ``id``,
-        ``context`` as parameters. Such a method::
-
-            @api.cr_uid_id
-            def method(self, cr, uid, id, args, context=None):
-                ...
-
-        may be called in both record and traditional styles, like::
-
-            # rec = model.browse(cr, uid, id, context)
-            rec.method(args)
-
-            model.method(cr, uid, id, args, context=context)
-    """
-    method._api = 'cr_uid_id_context'
-    return method
-
-
-def cr_uid_ids(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``uid``, ``ids`` as
-        parameters. Such a method may be called in both record and traditional
-        styles.
-    """
-    method._api = 'cr_uid_ids'
-    return method
-
-
-def cr_uid_ids_context(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``uid``, ``ids``,
-        ``context`` as parameters. Such a method::
-
-            @api.cr_uid_ids_context
-            def method(self, cr, uid, ids, args, context=None):
-                ...
-
-        may be called in both record and traditional styles, like::
-
-            # recs = model.browse(cr, uid, ids, context)
-            recs.method(args)
-
-            model.method(cr, uid, ids, args, context=context)
-
-        It is generally not necessary, see :func:`guess`.
-    """
-    method._api = 'cr_uid_ids_context'
-    return method
-
-
-def cr_uid_records(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``uid``, a
-        recordset of model ``self`` as parameters. Such a method::
-
-            @api.cr_uid_records
-            def method(self, cr, uid, records, args):
-                ...
-
-        may be called in both record and traditional styles, like::
-
-            # records = model.browse(cr, uid, ids, context)
-            records.method(args)
-
-            model.method(cr, uid, records, args)
-    """
-    method._api = 'cr_uid_records'
-    return method
-
-
-def cr_uid_records_context(method):
-    """ Decorate a traditional-style method that takes ``cr``, ``uid``, a
-        recordset of model ``self``, ``context`` as parameters. Such a method::
-
-            @api.cr_uid_records_context
-            def method(self, cr, uid, records, args, context=None):
-                ...
-
-        may be called in both record and traditional styles, like::
-
-            # records = model.browse(cr, uid, ids, context)
-            records.method(args)
-
-            model.method(cr, uid, records, args, context=context)
-    """
-    method._api = 'cr_uid_records_context'
-    return method
-
-
-def v7(method_v7):
-    """ Decorate a method that supports the old-style api only. A new-style api
-        may be provided by redefining a method with the same name and decorated
-        with :func:`~.v8`::
-
-            @api.v7
-            def foo(self, cr, uid, ids, context=None):
-                ...
-
-            @api.v8
-            def foo(self):
-                ...
-
-        Special care must be taken if one method calls the other one, because
-        the method may be overridden! In that case, one should call the method
-        from the current class (say ``MyClass``), for instance::
-
-            @api.v7
-            def foo(self, cr, uid, ids, context=None):
-                # Beware: records.foo() may call an overriding of foo()
-                records = self.browse(cr, uid, ids, context)
-                return MyClass.foo(records)
-
-        Note that the wrapper method uses the docstring of the first method.
-    """
-    # retrieve method_v8 from the caller's frame
-    frame = currentframe().f_back
-    return frame.f_locals.get(method_v7.__name__, method_v7)
-
-
-def v8(method_v8):
-    """ Decorate a method that supports the new-style api only. An old-style api
-        may be provided by redefining a method with the same name and decorated
-        with :func:`~.v7`::
-
-            @api.v8
-            def foo(self):
-                ...
-
-            @api.v7
-            def foo(self, cr, uid, ids, context=None):
-                ...
-
-        Note that the wrapper method uses the docstring of the first method.
-    """
-    if method_v8.__name__ == 'read':
-        return multi(method_v8)
-    method_v8._api = 'v8'
-    return method_v8
-
-
-def noguess(method):
-    """ Decorate a method to prevent any effect from :func:`guess`. """
-    method._api = None
-    return method
-
-
-def guess(method):
-    """ Decorate ``method`` to make it callable in both traditional and record
-        styles. This decorator is applied automatically by the model's
-        metaclass, and has no effect on already-decorated methods.
-
-        The API style is determined by heuristics on the parameter names: ``cr``
-        or ``cursor`` for the cursor, ``uid`` or ``user`` for the user id,
-        ``id`` or ``ids`` for a list of record ids, and ``context`` for the
-        context dictionary. If a traditional API is recognized, one of the
-        decorators :func:`cr`, :func:`cr_context`, :func:`cr_uid`,
-        :func:`cr_uid_context`, :func:`cr_uid_id`, :func:`cr_uid_id_context`,
-        :func:`cr_uid_ids`, :func:`cr_uid_ids_context` is applied on the method.
-
-        Method calls are considered traditional style when their first parameter
-        is a database cursor.
-    """
-    if hasattr(method, '_api'):
-        return method
-
-    # introspection on argument names to determine api style
-    args, vname, kwname, defaults = getargspec(method)
-    names = tuple(args) + (None,) * 4
-
-    if names[0] == 'self':
-        if names[1] in ('cr', 'cursor'):
-            if names[2] in ('uid', 'user'):
-                if names[3] == 'ids':
-                    if 'context' in names or kwname:
-                        return cr_uid_ids_context(method)
-                    else:
-                        return cr_uid_ids(method)
-                elif names[3] == 'id' or names[3] == 'res_id':
-                    if 'context' in names or kwname:
-                        return cr_uid_id_context(method)
-                    else:
-                        return cr_uid_id(method)
-                elif 'context' in names or kwname:
-                    return cr_uid_context(method)
-                else:
-                    return cr_uid(method)
-            elif 'context' in names:
-                return cr_context(method)
-            else:
-                return cr(method)
-
-    # no wrapping by default
-    return noguess(method)
-
-
-def expected(decorator, func):
-    """ Decorate ``func`` with ``decorator`` if ``func`` is not wrapped yet. """
-    return decorator(func) if not hasattr(func, '_api') else func
-
-
 def _call_kw_model(method, self, args, kwargs):
     context, args, kwargs = split_context(method, args, kwargs)
     recs = self.with_context(context or {})
diff --git a/odoo/models.py b/odoo/models.py
index 0ffac157bc6..e9c09e5625f 100644
--- a/odoo/models.py
+++ b/odoo/models.py
@@ -298,7 +298,6 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
         """
         pass
 
-    @api.model_cr_context
     def _reflect(self):
         """ Reflect the model and its fields in the models 'ir.model' and
         'ir.model.fields'. Also create entries in 'ir.model.data' if the key
@@ -2281,7 +2280,6 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
         else:
             return '"%s"."%s"' % (alias, fname)
 
-    @api.model_cr
     def _parent_store_compute(self):
         """ Compute parent_path field from scratch. """
         if not self._parent_store:
@@ -2320,7 +2318,6 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
         self.invalidate_cache(['parent_path'])
         return True
 
-    @api.model_cr
     def _check_removed_columns(self, log=False):
         # iterate on the database columns to drop the NOT NULL constraints of
         # fields which were required but have been removed (or will be added by
@@ -2343,7 +2340,6 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
             if row['attnotnull']:
                 tools.drop_not_null(cr, self._table, row['attname'])
 
-    @api.model_cr_context
     def _init_column(self, column_name):
         """ Initialize the value of the given column for existing rows. """
         # get the default value; ideally, we should use default_get(), but it
@@ -2375,7 +2371,6 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
         self.env.cr.execute('SELECT 1 FROM "%s" LIMIT 1' % self._table)
         return self.env.cr.rowcount
 
-    @api.model_cr_context
     def _auto_init(self):
         """ Initialize the database schema of ``self``:
             - create the corresponding table,
@@ -2446,14 +2441,12 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
         if parent_path_compute:
             self._parent_store_compute()
 
-    @api.model_cr
     def init(self):
         """ This method is called after :meth:`~._auto_init`, and may be
             overridden to create or modify a model's database schema.
         """
         pass
 
-    @api.model_cr
     def _create_parent_columns(self):
         tools.create_column(self._cr, self._table, 'parent_path', 'VARCHAR')
         if 'parent_path' not in self._fields:
@@ -2461,7 +2454,6 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
         elif not self._fields['parent_path'].index:
             _logger.error('parent_path field on model %s must be indexed! Add index=True to the field definition)', self._name)
 
-    @api.model_cr
     def _add_sql_constraints(self):
         """
 
@@ -2489,7 +2481,6 @@ class BaseModel(MetaModel('DummyModel', (object,), {'_register': False})):
             else:
                 process(key, definition)
 
-    @api.model_cr
     def _execute_sql(self):
         """ Execute the SQL code from the _sql attribute (if any)."""
         if hasattr(self, "_sql"):
@@ -4527,7 +4518,6 @@ Fields:
         """
         return cls._transient
 
-    @api.model_cr
     def _transient_clean_rows_older_than(self, seconds):
         assert self._transient, "Model %s is not transient, it cannot be vacuumed!" % self._name
         # Never delete rows used in last 5 minutes
@@ -4539,7 +4529,6 @@ Fields:
         ids = [x[0] for x in self._cr.fetchall()]
         self.sudo().browse(ids).unlink()
 
-    @api.model_cr
     def _transient_clean_old_rows(self, max_count):
         # Check how many rows we have in the table
         self._cr.execute("SELECT count(*) AS row_count FROM " + self._table)
@@ -4682,7 +4671,6 @@ Fields:
         for record in self:
             record.active = not record.active
 
-    @api.model_cr
     def _register_hook(self):
         """ stuff to do right after the registry is built """
         pass
@@ -4714,7 +4702,7 @@ Fields:
         origin = getattr(cls, name)
         method.origin = origin
         # propagate decorators from origin to method, and apply api decorator
-        wrapped = api.guess(api.propagate(origin, method))
+        wrapped = api.propagate(origin, method)
         wrapped.origin = origin
         setattr(cls, name, wrapped)