[ADD] real_estate: Add required fields for property details

- Introduce essential fields to the estate_property model for comprehensive property detail storage.
- Set name and expected_price fields as always required to ensure data integrity.
- Implement an API constraint to validate that expected_price is always greater than zero.

Chapter 3

Author: Arbaaz-Khan-Tech

estate/__init__.py

@@ -0,0 +1 @@
+from . import models

estate/__manifest__.py

@@ -7,6 +7,7 @@
     'description': """
     A module so that customers can bid on real estates
     """,
+    'license': 'LGPL-3',  # Default License
     'application': True,
     'installable': True,
     # data files always loaded at installation

estate/models/__init__.py

@@ -0,0 +1 @@
+from . import estate_property

estate/models/estate_property.py

@@ -0,0 +1,31 @@
+from odoo import fields, models, api
+from odoo.exceptions import ValidationError
+
+
+class estate_property(models.Model):
+
+    _name = "estate.property"
+    _description = "A real estate model with many fields"
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Integer()
+    date_availability = fields.Datetime()
+    expected_price = fields.Float(required=True)
+    selling_price = fields.Float()
+    bedrooms = fields.Integer()
+    living_area = fields.Integer()
+    facades = fields.Integer()
+    garage = fields.Boolean()
+    garden = fields.Boolean()
+    garden_area = fields.Integer()
+    garden_orientation = fields.Selection(
+        string='Type',
+        selection=[('north', 'North'), ('south', 'South'),
+                   ('east', 'East'), ('west', 'West')],
+        help="Type is used to specify the garden orientation")
+
+    @api.constrains('expected_price')
+    def _check_price(self):
+        for rec in self:
+            if rec.expected_price <= 0:
+                raise ValidationError("Price must be positive")