[IMP] (Chapter: 8) estate: compute fields and onchange behavior for estate

Add compute, inverse, and onchange methods to the estate model.
Introduce @api.depends to compute the total area and best price, and use @api.onchange to automatically fill garden_area and orientation when the garden field is modified.

Author: snrav-odoo

estate/models/estate_property.py

@@ -1,4 +1,4 @@
-from odoo import models, fields
+from odoo import models, api, fields
 from dateutil.relativedelta import relativedelta
 
 
@@ -46,3 +46,27 @@ class EstateProperty(models.Model):
     )
     tag_ids = fields.Many2many("estate.property.tag", string="Property Tags")
     offer_ids = fields.One2many("estate.property.offer", "property_id", string="Offer")
+    total_area = fields.Integer(compute="_compute_area")
+    best_price = fields.Integer(compute="_compute_highest")
+
+    @api.depends("living_area", "garden_area")
+    def _compute_area(self):
+        for record in self:
+            record.total_area = record.living_area + record.garden_area
+
+    @api.depends("offer_ids.price")
+    def _compute_highest(self):
+        for record in self:
+            if not record.mapped("offer_ids.price"):
+                record.best_price = 0
+            else:
+                record.best_price = max(record.mapped("offer_ids.price"))
+
+    @api.onchange("garden")
+    def _onchange_garden(self):
+        if self.garden:
+            self.garden_area = 10
+            self.garden_orientation = "north"
+        else:
+            self.garden_area = 0
+            self.garden_orientation = None

estate/models/estate_property_offer.py

@@ -1,4 +1,5 @@
-from odoo import models, fields
+from odoo import models, api, fields
+from dateutil.relativedelta import relativedelta
 
 
 class EstatePropertyOffer(models.Model):
@@ -11,3 +12,16 @@ class EstatePropertyOffer(models.Model):
     )
     partner_id = fields.Many2one("res.partner", string="Partner", required=True)
     property_id = fields.Many2one("estate.property", string="Property", required=True)
+    validity = fields.Integer(default=7)
+    date_deadline = fields.Date(compute="_compute_deadline", inverse="_inverse_date")
+
+    @api.depends("validity")
+    def _compute_deadline(self):
+        for record in self:
+            base_date = record.create_date or fields.Date.today()
+            record.date_deadline = base_date + relativedelta(days=record.validity)
+
+    def _inverse_date(self):
+        for record in self:
+            base_date = record.create_date or fields.Date.today()
+            record.validity = (record.date_deadline - fields.Date.to_date(base_date)).days

estate/views/estate_property_offer_views.xml

@@ -14,6 +14,8 @@
                 <field name="price"/>
                 <field name="partner_id"/>
                 <field name="status"/> 
+                <field name="validity" string="Validity(days)"/>
+                <field name="date_deadline"/>
             </list>
         </field>
     </record>
@@ -28,6 +30,8 @@
                         <field name="price" />
                         <field name="partner_id" />
                         <field name="status" />
+                        <field name="validity" string="Validity(days)"/>
+                        <field name="date_deadline"/>
                     </group>
                 </sheet>
             </form>

estate/views/estate_property_views.xml

@@ -23,20 +23,21 @@
         <field name="model">estate.property</field>
         <field name="arch" type="xml">
            <form string="Property">
-                <sheet>
-                    <h1>    
-                        <field name="name" string="Title"/>
+                 <sheet>
+                    <h1>
+                        <field name="name" string="Title" />
                     </h1>
                     <field name="tag_ids" widget="many2many_tags" />
                     <group>
                         <group>
-                            <field name="postcode"/>    
-                            <field name="expected_price"/>
-                            <field name="selling_price"/>
+                            <field name="property_type_id" string="Property Type" options="{'no_create': true}"/>
+                            <field name="postcode" />
+                            <field name="date_availability" string="Available From" />
                         </group>
                         <group>
-                            <field name="property_type_id" options="{'no_create': true}"/>
-                            <field name="date_availability" string="Available From"/>
+                            <field name="expected_price" />
+                            <field name="selling_price" />
+                            <field name="best_price"/>
                         </group>
                     </group>
                     <notebook>
@@ -51,8 +52,11 @@
                                 <field name="garden"/>
                                 <field name="garden_area" string="Garden Area(sqm)"/>
                                 <field name="garden_orientation"/>
+                                <field name="total_area" string="Total Area(sqm)"/>                                                   
+                        </group>
+                        <group>
                                 <field name="active"/>
-                                <field name="state"/>        
+                                <field name="state"/>
                         </group>
                         </group>
                         </page>