[REF] purchase_requisition: sequence handling

When creating a draft purchase agreement, a reference number was generated even if
we do not click the 'Save' button.
Now, the reference is filled with 'New' at the creation and overided with a proper
reference number after clicking on 'Save'. Also, the prefix depends now of the
requisition type. BOxxxxx for blanket orders, TExxxxx for call for tenders.

addons/purchase_requisition/data/purchase_requisition_data.xml

@@ -17,11 +17,18 @@
             <field name="quantity_copy">copy</field>
         </record>
 
-        <record id="seq_purchase_requisition" model="ir.sequence">
-            <field name="name">Purchase Requisition Order</field>
-            <field name="code">purchase.order.requisition</field>
+        <record id="seq_purchase_tender" model="ir.sequence">
+            <field name="name">Purchase Tender</field>
+            <field name="code">purchase.requisition.purchase.tender</field>
             <field name="prefix">TE</field>
             <field name="padding">5</field>
         </record>
+
+        <record id="seq_blanket_order" model="ir.sequence">
+            <field name="name">Blanket Order</field>
+            <field name="code">purchase.requisition.blanket.order</field>
+            <field name="prefix">BO</field>
+            <field name="padding">5</field>
+        </record>
     </data>
 </odoo>

addons/purchase_requisition/models/purchase_requisition.py

@@ -45,7 +45,7 @@ class PurchaseRequisition(models.Model):
     def _get_type_id(self):
         return self.env['purchase.requisition.type'].search([], limit=1)
 
-    name = fields.Char(string='Agreement Reference', required=True, copy=False, default= lambda self: self.env['ir.sequence'].next_by_code('purchase.order.requisition'))
+    name = fields.Char(string='Agreement Reference', required=True, copy=False, default='New', readonly=True)
     origin = fields.Char(string='Source Document')
     order_count = fields.Integer(compute='_compute_orders_number', string='Number of Orders')
     vendor_id = fields.Many2one('res.partner', string="Vendor")
@@ -68,6 +68,16 @@ class PurchaseRequisition(models.Model):
     picking_type_id = fields.Many2one('stock.picking.type', 'Operation Type', required=True, default=_get_picking_in)
     is_quantity_copy = fields.Selection(related='type_id.quantity_copy', readonly=True)
 
+    @api.model
+    def create(self, vals):
+        rec = super(PurchaseRequisition, self).create(vals)
+        if rec.name == 'New':
+            if rec.is_quantity_copy != 'none':
+                rec.name = self.env['ir.sequence'].next_by_code('purchase.requisition.purchase.tender')
+            else:
+                rec.name = self.env['ir.sequence'].next_by_code('purchase.requisition.blanket.order')
+        return rec
+
     @api.onchange('vendor_id')
     def _onchange_vendor(self):
         requisitions = self.env['purchase.requisition'].search([

addons/purchase_requisition/views/purchase_requisition_views.xml

@@ -144,7 +144,7 @@
                 <div class="pull-left">
                     <label for="name" class="oe_edit_only oe_inline"/>
                     <h1>
-                        <field name="name" attrs="{'readonly': [('state','not in',('draft'))]}"/>
+                        <field name="name"/>
                     </h1>
                 </div>
                 <group>