[FIX] hr_holidays: allocation list with leave type in hours

When a leave type is in hours, before this commit, in the allocation
list the allocation is shown in days. The problem is that the number of
days its calculated with the average hour per day. If in the company
each day have different working hour, then the number of days calculated
with the average didn't represent the actual number of days that the
employee can take.

Now, in the allocation list, the allocation is shown either with days or
hours depending on the leave type.

opw-1972133

addons/hr_holidays/models/hr_leave_allocation.py

@@ -12,6 +12,7 @@ from odoo import api, fields, models
 from odoo.addons.resource.models.resource import HOURS_PER_DAY
 from odoo.exceptions import AccessError, UserError
 from odoo.tools.translate import _
+from odoo.tools.float_utils import float_round
 
 _logger = logging.getLogger(__name__)
 
@@ -71,6 +72,8 @@ class HolidaysAllocation(models.Model):
     number_of_hours_display = fields.Float(
         'Duration (hours)', compute='_compute_number_of_hours_display',
         help="UX field allowing to see and modify the allocation duration, computed in hours.")
+    duration_display = fields.Char('Allocated (Days/Hours)', compute='_compute_duration_display',
+        help="Field allowing to see the allocation duration in days or hours depending on the type_request_unit")
     # details
     parent_id = fields.Many2one('hr.leave.allocation', string='Parent')
     linked_request_ids = fields.One2many('hr.leave.allocation', 'parent_id', string='Linked Requests')
@@ -205,6 +208,16 @@ class HolidaysAllocation(models.Model):
         for allocation in self:
             allocation.number_of_hours_display = allocation.number_of_days * (allocation.employee_id.resource_calendar_id.hours_per_day or HOURS_PER_DAY)
 
+    @api.multi
+    @api.depends('number_of_hours_display', 'number_of_days_display')
+    def _compute_duration_display(self):
+        for allocation in self:
+            allocation.duration_display = '%g %s' % (
+                (float_round(allocation.number_of_hours_display, precision_digits=2)
+                if allocation.type_request_unit == 'hour'
+                else float_round(allocation.number_of_days_display, precision_digits=2)),
+                _('hours') if allocation.type_request_unit == 'hour' else _('days'))
+
     @api.multi
     @api.depends('state', 'employee_id', 'department_id')
     def _compute_can_reset(self):

addons/hr_holidays/views/hr_leave_allocation_views.xml

@@ -175,7 +175,7 @@
                 <field name="department_id" invisible="1"/>
                 <field name="holiday_status_id"/>
                 <field name="name"/>
-                <field name="number_of_days" string="Allocated Days" sum="Total allocated days"/>
+                <field name="duration_display"/>
                 <field name="message_needaction" invisible="1"/>
                 <field name="state"/>
                 <button string="Approve" name="action_approve" type="object"