[ADD] real estate: add basic module

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'Real Estate',
+    'application': True,
+    'depends': [
+        'base'
+    ],
+    'data': [
+        'security/ir.model.access.csv',
+        'views/estate_property_offer_views.xml',
+        'views/estate_property_tag_views.xml',
+        'views/estate_property_type_views.xml',
+        'views/estate_property_views.xml',
+        'views/estate_menus.xml'
+    ],
+}

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

estate/models/estate_property.py

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+from odoo import api, fields, models
+from odoo.exceptions import UserError
+from odoo.exceptions import ValidationError
+from odoo.tools.float_utils import float_compare, float_is_zero
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "It's free real estate"
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(default=fields.Date.add(fields.Date.today(), months=3), copy=False)
+    expected_price = fields.Float(required=True)
+    selling_price = fields.Float(readonly=True, copy=False)
+    bedrooms = fields.Integer(default=2)
+    living_area = fields.Integer()
+    facades = fields.Integer()
+    garage = fields.Boolean()
+    garden = fields.Boolean()
+    garden_area = fields.Integer()
+    garden_orientation = fields.Selection(
+        string='Garden Orientation',
+        selection=[('north', 'North'), ('south', 'South'), ('east', 'East'), ('west', 'West')])
+    state = fields.Selection(
+            string='State',
+            selection=[
+                ('new', 'New'),
+                ('offer_received', 'Offer Received'),
+                ('offer_accepted', 'Offer Accepted'),
+                ('sold', 'Sold'),
+                ('canceled', 'Cancelled'),
+            ],
+            default='new',
+            required=True,
+            copy=False
+        )
+
+    # Relations
+    property_type_id = fields.Many2one("estate.property.type")
+    property_tag_ids = fields.Many2many("estate.property.tag")
+    salesperson_id = fields.Many2one('res.users', string='Salesman', default=lambda self: self.env.user)
+    buyer_id = fields.Many2one('res.partner', copy=False)
+    offer_ids = fields.One2many("estate.property.offer", "property_id", string="Offers")
+
+    # -------------------------------------------------------------------------
+    # COMPUTED FIELDS
+    # -------------------------------------------------------------------------
+    total_area = fields.Integer(
+        string="Total Area (sqm)", 
+        compute="_compute_total_area"
+    )
+
+    best_price = fields.Float(
+        string="Best Offer", 
+        compute="_compute_best_price"
+    )
+
+    # -------------------------------------------------------------------------
+    # RESERVED FIELDS
+    # -------------------------------------------------------------------------
+    active = fields.Boolean(default=True, string='Active')
+
+    # -------------------------------------------------------------------------
+    # CONSTRAINTS
+    # -------------------------------------------------------------------------
+    _check_expected_price = models.Constraint(
+        'CHECK(expected_price > 0)', 
+        'A property expected price must be strictly positive.'
+    )
+
+    _check_selling_price = models.Constraint(
+        'CHECK(selling_price >= 0)', 
+        'A property selling price must be positive.'
+    )
+
+    @api.constrains('expected_price', 'selling_price')
+    def _check_selling_price(self):
+        for record in self:
+            # Selling price = 0 => Do nothing
+            if float_is_zero(record.selling_price, precision_digits=2):
+                continue
+
+            minimum_price = record.expected_price * 0.90
+
+            if float_compare(record.selling_price, minimum_price, precision_digits=2) < 0:
+                raise ValidationError("The selling price cannot be lower than 90% of the expected price.")
+
+    # -------------------------------------------------------------------------
+    # COMPUTE METHODS
+    # -------------------------------------------------------------------------
+    @api.depends("living_area", "garden_area")
+    def _compute_total_area(self):
+        for record in self:
+            record.total_area = record.living_area + record.garden_area
+
+    @api.depends("offer_ids.price")
+    def _compute_best_price(self):
+        for record in self:
+            if record.offer_ids:
+                record.best_price = max(record.offer_ids.mapped("price"))
+            else:
+                record.best_price = 0.0
+
+    # -------------------------------------------------------------------------
+    # ONCHANGE METHODS
+    # -------------------------------------------------------------------------
+    @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 = False
+
+    # -------------------------------------------------------------------------
+    # ACTIONS
+    # -------------------------------------------------------------------------
+    def action_sold(self):
+        for record in self:
+            if record.state == 'canceled':
+                raise UserError("You cannot sell a canceled property.")
+            record.state = 'sold'
+        return True
+
+    def action_cancel(self):
+        for record in self:
+            if record.state == 'sold':
+                raise UserError("You cannot cancel a sold property.")
+            record.state = 'canceled'
+        return True

estate/models/estate_property_offer.py

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+from datetime import timedelta
+from odoo import api, fields, models
+from odoo.exceptions import UserError
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Real Estate Property Offer"
+
+    price = fields.Float()
+    status = fields.Selection(
+        selection=[
+            ('accepted', 'Accepted'),
+            ('refused', 'Refused')
+        ],
+        copy=False
+    )
+    validity = fields.Integer(default=7)
+    date_deadline = fields.Date(
+        compute="_compute_date_deadline",
+        inverse="_inverse_date_deadline"
+    )
+    partner_id = fields.Many2one("res.partner", required=True)
+    property_id = fields.Many2one("estate.property", required=True)
+
+    # -------------------------------------------------------------------------
+    # CONSTRAINTS
+    # -------------------------------------------------------------------------
+    _check_price = models.Constraint(
+        'CHECK(price > 0)', 
+        'An offer price must be strictly positive.'
+    )
+
+    @api.depends("create_date", "validity")
+    def _compute_date_deadline(self):
+        for offer in self:
+            base_date = offer.create_date.date() if offer.create_date else fields.Date.today()
+            offer.date_deadline = base_date + timedelta(days=offer.validity)
+
+    def _inverse_date_deadline(self):
+        for offer in self:
+            base_date = offer.create_date.date() if offer.create_date else fields.Date.today()
+            if offer.date_deadline:
+                offer.validity = (offer.date_deadline - base_date).days
+
+    # -------------------------------------------------------------------------
+    # ACTIONS
+    # -------------------------------------------------------------------------
+    def action_accept(self):
+        for record in self:
+            if "accepted" in record.property_id.offer_ids.mapped("status"):
+                raise UserError("An offer has already been accepted for this property.")
+
+            record.status = 'accepted'
+            record.property_id.selling_price = record.price
+            record.property_id.buyer_id = record.partner_id
+        return True
+
+    def action_refuse(self):
+        for record in self:
+            record.status = 'refused'
+        return True

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Property's tag"
+
+    name = fields.Char(required=True)
+
+    # -------------------------------------------------------------------------
+    # CONSTRAINTS
+    # -------------------------------------------------------------------------
+    _unique_tag_name = models.Constraint(
+        'UNIQUE(name)', 
+        'A property tag name must be unique.'
+    )

estate/models/estate_property_type.py

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+from odoo import fields, models
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Property's type"
+
+    name = fields.Char(required=True)
+
+    # -------------------------------------------------------------------------
+    # CONSTRAINTS
+    # -------------------------------------------------------------------------
+    _unique_type_name = models.Constraint(
+        'UNIQUE(name)', 
+        'A property type name must be unique.'
+    )

estate/security/ir.model.access.csv

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+id,name,model_id:id,group_id:id,perm_read,perm_write,perm_create,perm_unlink
+estate.access_estate_property,access_estate_property,estate.model_estate_property,base.group_user,1,1,1,1
+estate.access_estate_property_type,access_estate_property_type,estate.model_estate_property_type,base.group_user,1,1,1,1
+estate.access_estate_property_tag,access_estate_property_tag,estate.model_estate_property_tag,base.group_user,1,1,1,1
+estate.access_estate_property_offer,access_estate_property_offer,estate.model_estate_property_offer,base.group_user,1,1,1,1

estate/views/estate_menus.xml

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+<?xml version="1.0"?>
+<odoo>
+    <menuitem id="estate_menu_root" name="Real Estate">
+        <menuitem id="estate_advertisements_menu" name="Advertisements">
+            <menuitem id="estate_model_menu_action" action="estate_property_action" name="Properties"/>
+        </menuitem>
+        <menuitem id="estate_settings_menu" name="Settings">
+            <menuitem id="estate_property_type_model_menu_action" action="estate_property_type_action" name="Property Types"/>
+            <menuitem id="estate_property_tag_model_menu_action" action="estate_property_tag_action" name="Property Tags"/>
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_offer_views.xml

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+<?xml version="1.0"?>
+<odoo>
+
+    <record id="estate_property_offer_view_list" model="ir.ui.view">
+        <field name="name">estate.property.offer.list</field>
+        <field name="model">estate.property.offer</field>
+        <field name="arch" type="xml">
+            <list string="Property Offers">
+                <field name="price"/>
+                <field name="partner_id"/>
+                <field name="validity" string="Validity (days)"/>
+                <field name="date_deadline" string="Deadline"/>
+                <button name="action_accept" type="object" title="Accept" icon="fa-check"/>
+                <button name="action_refuse" type="object" title="Refuse" icon="fa-times"/>
+                <field name="status"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="estate_property_offer_view_form" model="ir.ui.view">
+        <field name="name">estate.property.offer.form</field>
+        <field name="model">estate.property.offer</field>
+        <field name="arch" type="xml">
+            <form string="Property Offer">
+                <sheet>
+                    <group>
+                        <field name="price"/>
+                        <field name="partner_id"/>
+                        <field name="validity" string="Validity (days)"/>
+                        <field name="date_deadline" string="Deadline"/>
+                        <field name="status"/>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+</odoo>

estate/views/estate_property_tag_views.xml

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+<?xml version="1.0"?>
+<odoo>
+    <record id="estate_property_tag_action" model="ir.actions.act_window">
+        <field name="name">Property Tag</field>
+        <field name="res_model">estate.property.tag</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>

estate/views/estate_property_type_views.xml

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+<?xml version="1.0"?>
+<odoo>
+    <record id="estate_property_type_action" model="ir.actions.act_window">
+        <field name="name">Property Types</field>
+        <field name="res_model">estate.property.type</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>