implement chapters 1-5 of technical tutorial

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'Real Estate',
+    'author': 'mila',
+    'license': 'LGPL-3',
+    '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',
+    ],
+    'application': True,
+}

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 datetime import date
+from dateutil.relativedelta import relativedelta
+from odoo.tools.float_utils import float_compare, float_is_zero
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Real Estate Property"
+    _order = "id desc"
+
+    name = fields.Char(string="Title", required=True)
+    description = fields.Text(string="Description")
+    postcode = fields.Char(string="Postcode")
+    date_availability = fields.Date(string="Available From", copy=False, default=lambda self: date.today() + relativedelta(months=3))
+    expected_price = fields.Float(string="Expected Price", required=True)
+    _check_expected_price = models.Constraint(
+        "CHECK(expected_price > 0)", "Expected price should be positive."
+    )
+    selling_price = fields.Float(string="Selling Price", readonly=True, copy=False)
+    _check_selling_price = models.Constraint(
+        "CHECK(selling_price > 0)", "Selling price must be positive."
+    )
+    bedrooms = fields.Integer(string="Bedrooms", default=2)
+    living_area = fields.Integer(string="Living Area")
+    facades = fields.Integer(string="Facades")
+    garage = fields.Boolean(string="Garage")
+    garden = fields.Boolean(string="Garden")
+    garden_area = fields.Integer(string="Garden Area")
+
+    garden_orientation = fields.Selection(
+        selection=[
+            ('north', 'North'),
+            ('south', 'South'),
+            ('east', 'East'),
+            ('west', 'West'),
+        ],
+        string="Garden Orientation"
+    )
+
+    active = fields.Boolean(string="Active", default=True)
+
+    state = fields.Selection(
+        selection=[
+            ('new', 'New'),
+            ('offer_received', 'Offer Received'),
+            ('offer_accepted', 'Offer Accepted'),
+            ('sold', 'Sold'),
+            ('cancelled', 'Cancelled'),
+        ],
+        string="Status",
+        required=True,
+        copy=False,
+        default='new'
+    )
+    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(string="Total Area (sqm)", compute="_compute_total_area")
+    best_price = fields.Float(string="Best Offer", compute="_compute_best_price")
+
+    @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:
+            prices = record.offer_ids.mapped("price")
+            record.best_price = max(prices) if prices else 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
+
+    def action_cancel_property(self):
+        for property in self:
+            if property.state == "sold":
+                raise UserError("Sold properties cannot be cancelled.")
+            property.state = "cancelled"
+        return True
+
+    def action_sold_property(self):
+        for property in self:
+            if property.state == "cancelled":
+                raise UserError("Cancelled properties cannot be sold.")
+            property.state = "sold"
+        return True
+
+    @api.constrains("expected_price", "selling_price")
+    def _check_selling_price(self):
+        for property in self:
+            if not float_is_zero(property.selling_price, precision_digits=2) and (
+                float_compare(
+                    property.selling_price,
+                    0.9 * property.expected_price,
+                    precision_digits=2,
+                )
+                == -1
+            ):
+                raise ValidationError("Selling price must be at least 90% of the expected price.")
+
+    @api.ondelete(at_uninstall=False)
+    def _check_offers_before_delete(self):
+        for property in self:
+            if property.state not in ['new', 'cancelled']:
+                raise UserError("Cannot delete a property that is currently active or sold.")

estate/models/estate_property_offer.py

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+from odoo import models, fields, api
+from odoo.exceptions import UserError
+from datetime import date, timedelta
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Real Estate Property Offer"
+    _order = "price desc"
+
+    price = fields.Float(string="Price")
+    _check_price = models.Constraint(
+        "CHECK(price > 0)", "Offer price must be positive."
+    )
+    status = fields.Selection(
+        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_date_deadline", inverse="_inverse_date_deadline")
+
+    @api.depends("create_date", "validity")
+    def _compute_date_deadline(self):
+        for record in self:
+            base_date = record.create_date.date() if record.create_date else date.today()
+            record.date_deadline = base_date + timedelta(days=record.validity)
+
+    def _inverse_date_deadline(self):
+        for record in self:
+            base_date = record.create_date.date() if record.create_date else date.today()
+            if record.date_deadline:
+                record.validity = (record.date_deadline - base_date).days
+            else:
+                record.validity = 7
+
+    def action_accept_offer(self):
+        for offer in self:
+            if any(status == "accepted" for status in offer.property_id.offer_ids.mapped("status")):
+                raise UserError("An offer has already been accepted for this property.")
+
+            offer.status = "accepted"
+            offer.property_id.buyer_id = offer.partner_id
+            offer.property_id.selling_price = offer.price
+            offer.property_id.state = "offer_accepted"
+        return True
+
+    def action_reject_offer(self):
+        for offer in self:
+            offer.status = "refused"
+        return True
+
+    @api.model_create_multi
+    def create(self, vals_list):
+        for vals in vals_list:
+            property_record = self.env['estate.property'].browse(vals.get('property_id'))
+
+            if property_record:
+                if property_record.offer_ids:
+                    highest_existing_offer = max(property_record.offer_ids.mapped('price'))
+
+                    if vals.get('price', 0) < highest_existing_offer:
+                        raise UserError(("The offer price cannot be lower than an existing offer of %s.") % highest_existing_offer)
+
+                property_record.state = 'offer_received'
+
+        return super().create(vals_list)

estate/models/estate_property_tag.py

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

estate/models/estate_property_type.py

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+from odoo import models, fields, api
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Real Estate Property Type"
+    _order = "name"
+
+    active = fields.Boolean(default=True)
+    name = fields.Char(string="Name", required=True)
+    sequence = fields.Integer(string="Sequence", default=1, help="Used to order property types.")
+    _check_name_uniq = models.Constraint(
+        "unique (name)",
+        "Each property type name must be unique.",
+    )
+    property_ids = fields.One2many("estate.property", "property_type_id", string="Properties")
+    offer_ids = fields.One2many("estate.property.offer", "property_type_id", string="Offers")
+    offer_count = fields.Integer(string="Offers Count", compute="_compute_offer_count")
+
+    @api.depends("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 models, fields
+
+class ResUsers(models.Model):
+    _inherit = "res.users"
+
+    property_ids = fields.One2many(
+        "estate.property", 
+        "salesperson_id", 
+        string="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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+<odoo>
+    <data>
+        <!-- <menuitem id="estate_menu_root" name="Real Estate"/>
+
+        <menuitem id="estate_first_level_menu" name="Advertisements" parent="estate_menu_root"/>
+        <menuitem id="estate_model_menu_action" name="Properties" action="estate_property_action" parent="estate_first_level_menu"/>
+
+        <menuitem id="estate_menu_settings" name="Settings" parent="estate_menu_root"/>
+        <menuitem id="estate_menu_property_type" name="Property Types" action="estate_property_type_action" parent="estate_menu_settings"/>
+        <menuitem id="estate_menu_property_tag" name="Property Tags" action="estate_property_tag_action" parent="estate_menu_settings"/> -->
+
+        <menuitem id="estate_menu_root" name="Real Estate">
+            <menuitem id="estate_menu_advertisements" name="Advertisements">
+                <menuitem id="estate_model_menu_action" action="estate_property_action"/>
+            </menuitem>
+            <menuitem id="estate_menu_settings" name="Settings">
+                <menuitem id="estate_menu_property_type" action="estate_property_type_action"/>
+                <menuitem id="estate_menu_property_tag" action="estate_property_tag_action"/>
+            </menuitem>
+        </menuitem>
+    </data>
+</odoo>

estate/views/estate_property_offer_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <data>
+
+        <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" 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 or property_id.state in ['sold', 'cancelled']"/>
+                    <button name="action_reject_offer" string="Refuse" type="object" icon="fa-times" invisible="status or property_id.state in ['sold', 'cancelled']"/>
+
+                    <field name="status" string="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="Offer">
+                    <sheet>
+                        <group>
+                            <field name="price"/>
+                            <field name="partner_id"/>
+                            <field name="validity"/>
+                            <field name="date_deadline"/>
+                            <field name="status"/>
+                        </group>
+                    </sheet>
+                </form>
+            </field>
+        </record>
+
+    </data>
+</odoo>

estate/views/estate_property_tag_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <data>
+        <record id="estate_property_tag_action" model="ir.actions.act_window">
+            <field name="name">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_list" 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" string="Title"/>
+                    <field name="color" widget="color_picker"/>
+                </list>
+            </field>
+        </record>
+    </data>
+</odoo>