[IMP] estate: stat button on property type for related offers

- Implemented `property_type_id` to `estate.property.offer` as a related field.
- Implemented `offer_ids` and `offer_count` to `estate.property.type` to track
  related offers.
- Implemented a stat button on `estate.property.type` to view related offers
  with a filtered domain.

estate/models/estate_property.py

@@ -44,8 +44,7 @@ class EstateProperty(models.Model):
         required=True,
         copy=False,
         default='new',
-        readonly=True,
-        track_visibility='onchange'
+        readonly=True
     )
     property_type_id = fields.Many2one('estate.property.type', string='Property Type')
     buyer_id = fields.Many2one('res.partner', string='Buyer')

estate/models/estate_property_offer.py

@@ -19,8 +19,14 @@ class EstatePropertyOffer(models.Model):
         ('refused', 'Refused'),
         ('draft', 'Draft')
     ], default='draft', copy=False)
+
     partner_id = fields.Many2one('res.partner', string='Partner', required=True)
     property_id = fields.Many2one('estate.property', string='Property', required=True, ondelete='cascade')
+    property_type_id = fields.Many2one(
+        related='property_id.property_type_id',
+        store=True,
+        string='Property Type'
+    )
     validity = fields.Integer(string='Validity (days)', default=7)
     date_deadline = fields.Date(string='Deadline', compute="_compute_date_deadline", inverse="_inverse_date_deadline", store=True)
 

estate/models/estate_property_type.py

@@ -1,4 +1,4 @@
-from odoo import models, fields
+from odoo import models, fields, api
 
 
 class EstatePropertyType(models.Model):
@@ -9,6 +9,30 @@ class EstatePropertyType(models.Model):
     sequence = fields.Integer(string="Sequence", default=10)
     name = fields.Char('Name', required=True)
     property_ids = fields.One2many('estate.property', 'property_type_id', string='Properties')
+    offer_ids = fields.One2many(
+        'estate.property.offer',
+        'property_type_id',
+        string='Offers'
+    )
+    offer_count = fields.Integer(
+        string='  Offers Count',
+        compute='_compute_offer_count'
+    )
+
+    @api.depends('offer_ids')
+    def _compute_offer_count(self):
+        for record in self:
+            record.offer_count = len(record.offer_ids)
+
+    def action_open_offers(self):
+        self.ensure_one()
+        return {
+            'type': 'ir.actions.act_window',
+            'name': 'Property Offers',
+            'res_model': 'estate.property.offer',
+            'view_mode': 'tree,form',
+            'domain': [('property_type_id', '=', self.id)],
+        }
 
     _sql_constraints = [
         ('unique_type_name', 'UNIQUE(name)', 'The property type name must be unique.')

estate/views/estate_menus.xml

@@ -1,7 +1,7 @@
 <?xml version="1.0"?>
 <odoo>
     <menuitem id="estate_menu_root" name="Estate">
-        <menuitem id="estate_menu_properties" name="Properties">
+        <menuitem id="estate_menu_properties" name="Property">
             <menuitem id="estate_property_menu" action="estate_property_action"/>
         </menuitem>
         <menuitem id="estate_menu_properties_types" name="Settings">

estate/views/estate_property_offers_views.xml

@@ -32,5 +32,11 @@
             </tree>
         </field>
     </record>
+    <record id="estate_property_offer_action" model="ir.actions.act_window">
+        <field name="name">Property Offers</field>
+        <field name="res_model">estate.property.offer</field>
+        <field name="view_mode">tree,form</field>
+        <field name="domain">[('property_type_id', '=', active_id)]</field>
+    </record>
 
 </odoo>

estate/views/estate_property_types_views.xml

@@ -9,17 +9,27 @@
         <field name="model">estate.property.type</field>
         <field name="arch" type="xml">
             <form string="Property Type">
+                <header>
+                    <button name="action_open_offers" type="object" string=" Open Offers"
+                        class="oe_stat_button" icon="fa-list-alt">
+                        <field name="offer_count" widget="statinfo" class="oe_inline" />
+                    </button>
+                </header>
                 <sheet>
                     <group>
-                        <field name="name"/>
+                        <field name='name' />
                     </group>
-                        <field name="property_ids">                            
-                            <tree>
-                                <field name="name"/>
-                                <field name="expected_price"/>
-                                <field name="state"/>
-                            </tree>
-                        </field>
+                    <notebook>
+                        <page string="Properties">
+                            <field name="property_ids">
+                                <tree string='Property'>
+                                    <field name='name' />
+                                    <field name='expected_price' />
+                                    <field name='state' />
+                                </tree>
+                            </field>
+                        </page>
+                    </notebook>
                 </sheet>
             </form>
         </field>
@@ -29,8 +39,9 @@
         <field name="model">estate.property.type</field>
         <field name="arch" type="xml">
             <tree string="Property Types">
-                <field name="sequence" widget="handle"/>
-                <field name="name"/>
+                <field name="sequence" widget="handle" />
+                <field name="name" />
+                <field name="offer_count" />
             </tree>
         </field>
     </record>