[ADD] estate: add estate model for tutorials

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'Real Estate',
+    'depends': ['base'],
+    'data': [
+        'security/ir.model.access.csv',
+        'views/estate_property_offer_views.xml',
+        'views/estate_property_views.xml',
+        'views/estate_property_type_views.xml',
+        'views/estate_property_tag_views.xml',
+        'views/res_users_views.xml',
+        'views/estate_menus.xml',
+    ],
+    'application': True,
+    'author': 'Dilya Anvarbekova',
+    'license': 'LGPL-3',
+}

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 models, fields, api
+from odoo.exceptions import UserError, ValidationError
+from odoo.tools.float_utils import float_compare, float_is_zero
+
+
+class EstateProperty(models.Model):
+    _name = 'estate.property'
+    _description = 'Estate Property Information'
+    _order = 'id desc'
+
+    name = fields.Char(string='Property Name', required=True)
+    description = fields.Text(string='Description')
+    postcode = fields.Char(string='Postcode')
+    date_availability = fields.Date(string='Available From', copy=False, default=(fields.Date.add(fields.Date.today(), months=3)))
+    expected_price = fields.Float(string='Expected Price', required=True)
+    selling_price = fields.Float(string='Selling Price', readonly=True, copy=False)
+    bedrooms = fields.Integer(string='Bedrooms', default=2)
+    living_area = fields.Integer(string='Living Area (sqm)')
+    facades = fields.Integer(string='Number of Facades')
+    garage = fields.Boolean(string='Garage')
+    garden = fields.Boolean(string='Garden')
+    garden_area = fields.Integer(string='Garden Area')
+    garden_orientation = fields.Selection([('north', 'North'), ('south', 'South'), ('east', 'East'), ('west', 'West')], string='Garden Orientation')
+    active = fields.Boolean(string='Active', default=True)
+    state = fields.Selection(
+        [
+            ('new', 'New'),
+            ('offer_received', 'Offer Received'),
+            ('offer_accepted', 'Offer Accepted'),
+            ('sold', 'Sold'),
+            ('cancelled', 'Cancelled')
+        ],
+        string='Status',
+        default='new',
+        required=True,
+        copy=False
+    )
+    property_type_id = fields.Many2one('estate.property.type', string='Property Type')
+    buyer_id = fields.Many2one('res.partner', string='Buyer', copy=False)
+    salesperson_id = fields.Many2one('res.users', string='Salesperson', default=lambda self: self.env.user)
+    tag_ids = fields.Many2many('estate.property.tag', string='Tags')
+    offer_ids = fields.One2many('estate.property.offer', 'property_id', string='Offers')
+
+    total_area = fields.Integer(compute="_compute_total_area")
+    best_price = fields.Float(compute="_compute_best_price")
+
+    _check_expected_price = models.Constraint(
+        'CHECK(expected_price > 0)',
+        "The property expected selling price must be strictly positive."
+    )
+    _check_selling_price = models.Constraint(
+        'CHECK(selling_price >= 0)',
+        "The property selling price must be positive."
+    )
+
+    @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
+
+    @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
+
+    @api.constrains('selling_price', 'expected_price')
+    def _check_selling_price_expected_price(self):
+        for record in self:
+            if not float_is_zero(record.selling_price, precision_digits=2) \
+                and float_compare(record.selling_price, 0.9 * record.expected_price, precision_digits=2) < 0:
+                raise ValidationError("The selling price must be at least 90% of the expected price.")
+
+    @api.ondelete(at_uninstall=False)
+    def _check_state_on_delete(self):
+        for record in self:
+            if record.state not in ["new", "cancelled"]:
+                raise UserError("Cannot delete a property that is not new or cancelled.")
+
+    def action_cancel_property(self):
+        for record in self:
+            if record.state == 'sold':
+                raise UserError("Sold properties cannot be cancelled.")
+            else:
+                record.state = 'cancelled'
+
+    def action_sell_property(self):
+        for record in self:
+            if record.state == 'cancelled':
+                raise UserError("Cancelled properties cannot be sold.")
+            else:
+                record.state = 'sold'

estate/models/estate_property_offer.py

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+from odoo import api, fields, models
+from odoo.exceptions import UserError
+
+
+class EstatePropertyOffer(models.Model):
+    _name = 'estate.property.offer'
+    _description = 'Estate Property Offer Information'
+    _order = 'price desc'
+
+    price = fields.Float(string='Price')
+    status = fields.Selection([('accepted', 'Accepted'), ('refused', 'Refused')], string='Status', copy=False)
+    partner_id = fields.Many2one('res.partner', string='Partner', required=True)
+    property_id = fields.Many2one('estate.property', string='Property', required=True)
+    property_type_id = fields.Many2one('estate.property.type', related='property_id.property_type_id', string='Property Type', store=True)
+    validity = fields.Integer(string="Validity (days)", default=7)
+    date_deadline = fields.Date(string="Deadline", compute="_compute_deadline", inverse="_inverse_deadline")
+
+    _check_offer_price = models.Constraint(
+        'CHECK(price > 0)',
+        'The offer price must be strictly positive.'
+    )
+
+    @api.model
+    def create(self, vals_list):
+        for vals in vals_list:
+            prop = self.env['estate.property'].browse(vals.get('property_id'))
+            if prop.offer_ids:
+                if vals.get('price') < min(prop.offer_ids.mapped('price')):
+                    raise UserError("The new offer price cannot be lower than existing offers.")
+            prop.state = 'offer_received'
+        return super().create(vals_list)
+
+    @api.depends('validity')
+    def _compute_deadline(self):
+        for record in self:
+            start_date = record.create_date.date() if record.create_date else fields.Date.today()
+            record.date_deadline = fields.Date.add(start_date, days=record.validity)
+
+    def _inverse_deadline(self):
+        for record in self:
+            start_date = record.create_date.date() if record.create_date else fields.Date.today()
+            record.validity = (record.date_deadline - start_date).days
+
+    def action_accept_offer(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.state = 'offer_accepted'
+            record.property_id.buyer_id = record.partner_id
+
+    def action_refuse_offer(self):
+        for record in self:
+            if record.status == 'accepted':
+                raise UserError("You cannot refuse an accepted offer.")
+            record.status = 'refused'

estate/models/estate_property_tag.py

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+from odoo import models, fields
+
+
+class EstatePropertyTag(models.Model):
+    _name = 'estate.property.tag'
+    _description = 'Estate Property Tag Information'
+    _order = 'name asc'
+
+    name = fields.Char(string='Tag Name', required=True)
+    color = fields.Integer(string="Color")
+
+    _check_tag_name_unique = models.Constraint(
+        'UNIQUE(name)',
+        'The tag name must be unique.'
+    )

estate/models/estate_property_type.py

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+from odoo import api, fields, models
+
+
+class EstatePropertyType(models.Model):
+    _name = 'estate.property.type'
+    _description = 'Estate Property Type Information'
+    _order = 'sequence, name asc'
+
+    name = fields.Char(string='Property Type', required=True)
+    property_ids = fields.One2many('estate.property', 'property_type_id', string='Properties')
+    sequence = fields.Integer(string='Sequence', default=1)
+    offer_ids = fields.One2many("estate.property.offer", "property_type_id", string="Offers")
+
+    offer_count = fields.Integer(compute='_compute_offer_count', string='Offer Count')
+
+    _check_type_name_unique = models.Constraint(
+        'UNIQUE(name)',
+        'The property type name must be unique.'
+    )
+
+    @api.depends('property_ids.offer_ids')
+    def _compute_offer_count(self):
+        for record in self:
+            record.offer_count = len(record.offer_ids)

estate/models/res_users.py

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+from odoo import fields, models
+
+
+class ResUsers(models.Model):
+    _inherit = 'res.users'
+
+    property_ids = fields.One2many(
+        'estate.property',
+        'salesperson_id',
+        string='Assigned Properties',
+        domain=[('state', 'in', ['new', 'offer_received'])]
+    )

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
+access_estate_property,access_estate_property,model_estate_property,base.group_user,1,1,1,1
+access_estate_property_type,access_estate_property_type,model_estate_property_type,base.group_user,1,1,1,1
+access_estate_property_tag,access_estate_property_tag,model_estate_property_tag,base.group_user,1,1,1,1
+access_estate_property_offer,access_estate_property_offer,model_estate_property_offer,base.group_user,1,1,1,1

estate/views/estate_menus.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <menuitem id="estate_menu_root" name="Real Estate">
+        <menuitem id="estate_menu_advertisements" name="Advertisements">
+            <menuitem id="estate_property_menu_action" action="estate_property_action_view"/>
+        </menuitem>
+
+        <menuitem id="estate_menu_settings" name="Settings">
+            <menuitem id="estate_property_type_menu_action" action="estate_property_type_action_view"/>
+            <menuitem id="estate_property_tag_menu_action" action="estate_property_tag_action_view"/>
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_offer_views.xml

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+<odoo>
+    <record id="action_estate_property_offers" model="ir.actions.act_window">
+        <field name="name">Property Offers</field>
+        <field name="res_model">estate.property.offer</field>
+        <field name="view_mode">list,form</field>
+        <field name="domain">[('property_type_id', '=', active_id)]</field>
+    </record>
+
+    <record id="estate_property_offer_view_tree" 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="Estate Property Offers" editable="bottom" decoration-success="status == 'accepted'" decoration-danger="status == 'refused'">
+                <field name="price" string="Price"/>
+                <field name="partner_id" string="Partner"/>
+                <field name="validity" string="Validity (days)"/>
+                <field name="date_deadline" string="Deadline"/>
+                <button name="action_accept_offer" string="Accept" type="object" icon="fa-check" invisible="status != False"/>
+                <button name="action_refuse_offer" string="Refuse" type="object" icon="fa-times" invisible="status != False"/>
+            </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>
+                <sheet>
+                    <group>
+                        <field name="price"/>
+                        <field name="partner_id"/>
+                        <field name="status"/>
+                    </group>
+                    <group>
+                        <field name="validity" />
+                        <field name="date_deadline" />
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+</odoo>

estate/views/estate_property_tag_views.xml

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+<odoo>
+    <record id="estate_property_tag_action_view" model="ir.actions.act_window">
+        <field name="name">Estate Property Tags</field>
+        <field name="res_model">estate.property.tag</field>
+        <field name="view_mode">list,form</field>
+    </record>
+
+    <record id="estate_property_tag_view_tree" model="ir.ui.view">
+        <field name="name">estate.property.tag.list</field>
+        <field name="model">estate.property.tag</field>
+        <field name="arch" type="xml">
+            <list string="Property Tags" editable="bottom">
+                <field name="name"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="estate_property_tag_view_form" model="ir.ui.view">
+        <field name="name">estate.property.tag.form</field>
+        <field name="model">estate.property.tag</field>
+        <field name="arch" type="xml">
+            <form>
+                <sheet>
+                    <h1>
+                        <field name="name" string="Tag" />
+                    </h1>
+                </sheet>
+            </form>
+        </field>
+    </record>
+</odoo>

estate/views/estate_property_type_views.xml

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+<odoo>
+    <record id="estate_property_type_action_view" model="ir.actions.act_window">
+        <field name="name">Estate Property Types</field>
+        <field name="res_model">estate.property.type</field>
+        <field name="view_mode">list,form</field>
+    </record>
+
+    <record id="estate_property_type_list" model="ir.ui.view">
+        <field name="name">estate.property.type.list</field>
+        <field name="model">estate.property.type</field>
+        <field name="arch" type="xml">
+            <list string="Property Types" multi_edit="1">
+                <field name="sequence" widget="handle"/>
+                <field name="name" readonly="1"/>
+                <field name="offer_count" readonly="1"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="estate_property_type_view_form" model="ir.ui.view">
+        <field name="name">estate.property.type.form</field>
+        <field name="model">estate.property.type</field>
+        <field name="arch" type="xml">
+            <form>
+                <sheet>
+                    <div class="oe_button_box" name="button_box">
+                        <button name="%(action_estate_property_offers)d" 
+                                type="action" 
+                                class="oe_stat_button" 
+                                icon="fa-money">
+                            <field name="offer_count" string="Offers" widget="statinfo"/>
+                        </button>
+                    </div>
+                    <h1>
+                        <field name="name" string="Type" />
+                    </h1>
+                    <notebook>
+                        <page string="Properties">
+                            <field name="property_ids">
+                                <list string="Properties">
+                                    <field name="name"/>
+                                    <field name="expected_price"/>
+                                    <field name="state"/>
+                                </list>
+                            </field>
+                        </page>
+                    </notebook>
+                </sheet>
+            </form>
+        </field>
+    </record>
+</odoo>