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estate/__init__.py

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+# -*- coding: utf-8 -*-
+from . import models

estate/__manifest__.py

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+# -*- coding: utf-8 -*-
+{
+    "name": "Estate",
+    "summary": """
+        Tutorial starting module
+    """,
+    "description": """
+        Tutorial starting module
+    """,
+    "author": "",
+    "category": "Real Estate/Brokerage",
+    "version": "0.1",
+    "depends": ["base"],
+    "application": True,
+    "demo": [
+        "demo/estate.property.type.csv",
+        "demo/estate_property_demo.xml",
+        "demo/estate_property_offer_demo.xml",
+    ],
+    "data": [
+        "security/security.xml",
+        "security/ir.model.access.csv",
+        "security/ir_rule.xml",
+        "views/estate_property_tag_views.xml",
+        "views/estate_property_offer_views.xml",
+        "views/estate_property_type_views.xml",
+        "views/estate_property_views.xml",
+        "views/estate_salesperson_views.xml",
+        "views/estate_menus.xml",
+        "report/estate_property_reports.xml",
+        "report/estate_property_templates.xml",
+    ],
+    "license": "AGPL-3",
+}

estate/demo/estate.property.type.csv

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+"id","name","property_ids:id","sequence","offer_ids:id","offer_count"
+property_type_1,"Residential",,"6",,"0"
+property_type_2,"Commercial",,"1",,"0"
+property_type_3,"Industrial",,"3",,"0"
+property_type_4,"Land",,"16",,"0"

estate/demo/estate_property_demo.xml

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+<odoo>
+    <data>
+        <record id="estate_property_1" model="estate.property">
+            <field name="name">Big Villa</field>
+            <field name="property_type_id" ref="property_type_1"></field>
+            <field name="state">received</field>
+            <field name="description">A nice and big villa</field>
+            <field name="postcode">12345</field>
+            <field name="date_availability">1970-01-01</field>
+            <field name="expected_price">1600000</field>
+            <field name="bedrooms">6</field>
+            <field name="living_area">100</field>
+            <field name="facades">4</field>
+            <field name="garage">True</field>
+            <field name="garden">True</field>
+            <field name="garden_area">100000</field>
+            <field name="garden_orientation">south</field>
+            <field name="salesperson_id"></field>
+            <field name="company_id" ref="base.main_company"></field>
+        </record>
+
+        <record id="estate_property_2" model="estate.property">
+            <field name="name">trailer home</field>
+            <field name="property_type_id" ref="property_type_1"></field>
+            <field name="state">received</field>
+            <field name="description">Home in a trailer park</field>
+            <field name="postcode">54321</field>
+            <field name="date_availability">1970-01-01</field>
+            <field name="expected_price">100000</field>
+            <field name="selling_price">120000</field>
+            <field name="bedrooms">1</field>
+            <field name="living_area">10</field>
+            <field name="facades">4</field>
+            <field name="garage">False</field>
+            <field name="salesperson_id"></field>
+            <field name="company_id" ref="base.main_company"></field>
+        </record>
+
+        <record id="estate_property_3" model="estate.property">
+            <field name="name">Fancy Apartment</field>
+            <field name="property_type_id" ref="property_type_1"></field>
+            <field name="state">new</field>
+            <field name="description">A nice and big apartment</field>
+            <field name="postcode">12345</field>
+            <field name="date_availability">1970-01-01</field>
+            <field name="expected_price">1600000</field>
+            <field name="bedrooms">6</field>
+            <field name="living_area">100</field>
+            <field name="facades">4</field>
+            <field name="garage">True</field>
+            <field name="garden">True</field>
+            <field name="garden_area">100000</field>
+            <field name="garden_orientation">south</field>
+            <field name="salesperson_id"></field>
+            <field name="offer_ids" eval="[
+                Command.create({
+                    'price': 1500000,
+                    'partner_id': ref('base.res_partner_12'),
+                    'validity': 14
+                })
+            ]"/>
+            <field name="company_id" ref="base.main_company"></field>
+        </record>
+    </data>
+</odoo>

estate/demo/estate_property_offer_demo.xml

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+<odoo>
+    <data>
+        <record id="estate_property_offer_1" model="estate.property.offer">
+            <field name="price">10000</field>
+            <field name="partner_id" ref="base.res_partner_2"/>
+            <field name="validity">14</field>
+            <field name="property_id" ref="estate_property_1"/>
+            <field name="date_deadline" eval="datetime.now() + timedelta(days=14)"></field>
+        </record>
+
+        <record id="estate_property_offer_2" model="estate.property.offer">
+            <field name="price">1500000</field>
+            <field name="partner_id" ref="base.res_partner_12"/>
+            <field name="validity">14</field>
+            <field name="property_id" ref="estate_property_1"/>
+            <field name="date_deadline" eval="datetime.now() + timedelta(days=14)"></field>
+        </record>
+
+        <record id="estate_property_offer_3" model="estate.property.offer">
+            <field name="price">1500001</field>
+            <field name="partner_id" ref="base.res_partner_2"/>
+            <field name="validity">14</field>
+            <field name="property_id" ref="estate_property_1"/>
+            <field name="date_deadline" eval="datetime.now() + timedelta(days=14)"></field>
+        </record>
+
+        <function model="estate.property.offer" name="action_refuse">
+            <value eval="[ref('estate_property_offer_1')]"/>
+        </function>
+
+        <function model="estate.property.offer" name="action_accept">
+            <value eval="[ref('estate_property_offer_2')]"/>
+        </function>
+
+        <function model="estate.property.offer" name="action_refuse">
+            <value eval="[ref('estate_property_offer_3')]"/>
+        </function>
+
+        <record id="estate_property_offer_4" model="estate.property.offer">
+            <field name="price">100000</field>
+            <field name="partner_id" ref="base.res_partner_2"/>
+            <field name="validity">14</field>
+            <field name="property_id" ref="estate_property_2"/>
+            <field name="date_deadline" eval="datetime.now() + timedelta(days=14)"></field>
+        </record>
+
+        <record id="estate_property_offer_5" model="estate.property.offer">
+            <field name="price">120000</field>
+            <field name="partner_id" ref="base.res_partner_12"/>
+            <field name="validity">14</field>
+            <field name="property_id" ref="estate_property_2"/>
+            <field name="date_deadline" eval="datetime.now() + timedelta(days=14)"></field>
+        </record>
+
+        <record id="estate_property_offer_6" model="estate.property.offer">
+            <field name="price">120001</field>
+            <field name="partner_id" ref="base.res_partner_2"/>
+            <field name="validity">14</field>
+            <field name="property_id" ref="estate_property_2"/>
+            <field name="date_deadline" eval="datetime.now() + timedelta(days=14)"></field>
+        </record>
+    </data>
+</odoo>

estate/models/__init__.py

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+from . import estate_property
+from . import estate_property_type
+from . import estate_property_tag
+from . import estate_property_offer
+from . import res_users

estate/models/estate_property.py

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+from odoo import fields, models, api
+from dateutil.relativedelta import relativedelta
+from odoo.exceptions import UserError, ValidationError
+from odoo.tools import float_compare, float_is_zero
+
+
+class EstateProperty(models.Model):
+    _name = 'estate.property'
+    _description = "Estate Property"
+    _order = 'id desc'
+    _sql_constraints = [
+        (
+            'check_expected_price_strictly_positive',
+            'CHECK(expected_price > 0)',
+            "The expected price should be strictly positive.",
+        ),
+        (
+            'check_selling_price_positive',
+            'CHECK(selling_price >= 0)',
+            "The selling price should be positive.",
+        ),
+    ]
+
+    name = fields.Char("Title", required=True)
+
+    description = fields.Text("Description")
+
+    postcode = fields.Char("Postcode")
+
+    date_availability = fields.Date(
+        "Available From",
+        copy=False,
+        default=lambda self: fields.Date.today() + relativedelta(months=3),
+    )
+
+    expected_price = fields.Float("Expected Price", required=True)
+
+    selling_price = fields.Float("Selling Price", readonly=True, copy=False)
+
+    bedrooms = fields.Integer("Bedrooms", default=2)
+
+    living_area = fields.Integer("Living Area (sqm)")
+
+    facades = fields.Integer("Facades")
+
+    garage = fields.Boolean("Garage")
+
+    garden = fields.Boolean("Garden")
+
+    garden_area = fields.Integer("Garden Area (sqm)")
+
+    garden_orientation = fields.Selection(
+        string="Garden Orientation",
+        selection=[
+            ('north', "North"),
+            ('south', "South"),
+            ('east', "East"),
+            ('west', "West"),
+        ],
+    )
+
+    state = fields.Selection(
+        string="Status",
+        required=True,
+        copy=False,
+        default="new",
+        selection=[
+            ('new', "New"),
+            ('received', "Offer Received"),
+            ('accepted', "Offer Accepted"),
+            ('sold', "Sold"),
+            ('cancelled', "Cancelled"),
+        ],
+    )
+
+    active = fields.Boolean("Active", default=True)
+
+    property_type_id = fields.Many2one('estate.property.type', "Property Type")
+
+    buyer_id = fields.Many2one('res.partner', "Buyer", copy=False)
+
+    salesperson_id = fields.Many2one(
+        'res.users', "Salesperson", default=lambda self: self.env.user
+    )
+
+    tag_ids = fields.Many2many('estate.property.tag')
+
+    offer_ids = fields.One2many('estate.property.offer', 'property_id')
+
+    total_area = fields.Float(string="Total Area (sqm)", compute='_compute_total_area')
+
+    best_price = fields.Float(string="Best Price", compute='_compute_best_price')
+
+    company_id = fields.Many2one(
+        'res.company', "Agency", default=lambda self: self.env.company, required=True
+    )
+
+    @api.depends('living_area', 'garden_area')
+    def _compute_total_area(self):
+        for record in self:
+            record.total_area = record.garden_area + record.living_area
+
+    @api.depends('offer_ids.price')
+    def _compute_best_price(self):
+        for record in self:
+            record.best_price = max(record.offer_ids.mapped("price"), default=0)
+
+    @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
+
+    def action_sold(self):
+        for record in self:
+            if len(record.offer_ids) == 0:
+                raise UserError(self.env._("Properties without offers cannot be sold!"))
+            if record.state == 'cancelled':
+                raise UserError(self.env._("Cancelled properties cannot be sold!"))
+            else:
+                record.state = 'sold'
+            return True
+
+    def action_cancel(self):
+        for record in self:
+            if record.state == 'sold':
+                raise UserError(self.env._("Sold properties cannot be cancelled!"))
+            else:
+                record.state = 'cancelled'
+            return True
+
+    @api.constrains('selling_price')
+    def _check_compare_selling_price_to_expected_price(self):
+        for record in self:
+            if (
+                not float_is_zero(record.selling_price, precision_digits=5)
+                and float_compare(
+                    record.selling_price,
+                    record.expected_price * 0.9,
+                    precision_digits=5,
+                )
+                < 0
+            ):
+                raise ValidationError(
+                    self.env._(
+                        "Selling price of a property must not be less than 90 percent of the expected price."
+                    )
+                )
+
+    @api.ondelete(at_uninstall=False)
+    def _unlink_if_correct_states(self):
+        for record in self:
+            if record.state not in ('new', 'cancelled'):
+                raise UserError(
+                    self.env._(
+                        "Only records with status New and Cancelled may be deleted."
+                    )
+                )