Up to chapter 3

.vscode/settings.json

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+{
+    "python.languageServer": "None"
+}

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'Estate',
+    'version': '1.0',
+    'author': 'Odoo S.A.',
+    'license': 'AGPL-3',
+    'application': True,
+    'installable': True,
+
+    'depends': ['base'],
+
+    'data': [
+        'security/ir.model.access.csv',
+        'views/estate_property_offers_views.xml',
+        'views/estate_property_types_views.xml',
+        'views/estate_property_views.xml',
+        'views/estate_menus.xml',
+        'views/res_users_views.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
+from . import res_users

estate/models/estate_property.py

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+from odoo import api, fields, models, exceptions
+from odoo.tools.float_utils import float_compare, float_is_zero
+from dateutil.relativedelta import relativedelta
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Estate property"
+    _order = "id desc"
+
+    name = fields.Char(required=True, string="Title")
+    description = fields.Text(string="Description")
+    postcode = fields.Char(string="Postcode")
+    date_availability = fields.Date(
+        default=lambda self: fields.Date.today() + relativedelta(months=3),
+        copy=False,
+        string="Available From",
+    )
+    expected_price = fields.Float(required=True, string="Expected Price")
+    selling_price = fields.Float(
+        readonly=True, copy=False, string="Selling Price")
+    bedrooms = fields.Integer(default=2, string="Bedrooms")
+    living_area = fields.Integer(string="Living Area (sqm)")
+    facades = fields.Integer(string="Facades")
+    garage = fields.Boolean(string="Garage")
+    garden = fields.Boolean(string="Garden")
+    garden_area = fields.Integer(string="Garden Area (sqm)")
+    garden_orientation = fields.Selection(
+        selection=[
+            ('north', "North"),
+            ('south', "South"),
+            ('east', "East"),
+            ('west', "West")
+        ],
+        string="Garden Orientation",
+    )
+    active = fields.Boolean(default=True)
+    state = fields.Selection(
+        selection=[
+            ('new', "New"),
+            ('offer received', "Offer Received"),
+            ('offer accepted', "Offer Accepted"),
+            ('sold', "Sold"),
+            ('canceled', "Canceled")
+        ],
+        default='new',
+        required=True,
+        copy=False,
+        string="Status",
+    )
+    property_type_id = fields.Many2one(
+        'estate.property.type', string='Property Type')
+    seller_id = fields.Many2one(
+        'res.users', string='Salesman', default=lambda self: self.env.user)
+    buyer_id = fields.Many2one('res.partner', string='Buyer', copy=False)
+
+    tag_ids = fields.Many2many('estate.property.tag', string='Tags')
+
+    offer_ids = fields.One2many(
+        'estate.property.offer', 'property_id', string="Offers")
+
+    total_area = fields.Float(
+        compute="_compute_total_area", string="Total Area (sqm)")
+    best_offer = fields.Float(
+        compute="_compute_best_offer", string="Best Offer")
+
+    _check_expected_price = models.Constraint(
+        'CHECK(expected_price > 0)',
+        'The expected price of a property must be strictly positive!'
+    )
+    _check_selling_price = models.Constraint(
+        'CHECK(selling_price >= 0)',
+        'The selling price of a property must be strictly 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')
+    def _compute_best_offer(self):
+        for record in self:
+            if record.offer_ids:
+                record.best_offer = max(record.offer_ids.mapped('price'))
+            else:
+                record.best_offer = 0
+
+    @api.constrains('selling_price', 'expected_price')
+    def _check_price(self):
+        for record in self:
+            if float_is_zero(record.selling_price, 3):
+                continue
+            if float_compare(record.selling_price, 0.9 * record.expected_price, 3) == -1:
+                raise exceptions.ValidationError(
+                    "The selling price cannot be less than 90% of the expected price")
+
+    @api.onchange('offer_ids')
+    def _onchange_receive_offer(self):
+        for record in self.filtered(lambda record: record.state == 'new'):
+            if record.offer_ids:
+                record.state = 'offer received'
+
+    @api.onchange('garden')
+    def _onchange_garden(self):
+        if self.garden:
+            self.garden_area = 10
+            self.garden_orientation = 'north'
+        else:
+            self.garden_area = False
+            self.garden_orientation = False
+
+    @api.ondelete(at_uninstall=False)
+    def _unlike_property(self):
+        for record in self:
+            if record.state != 'new' and record.state != 'canceled':
+                raise exceptions.UserError(
+                    "You cannot delete this property: only new and canceled properities can be deleted.")
+
+    def action_mark_as_sold(self):
+        for record in self:
+            if record.state != 'canceled':
+                record.state = 'sold'
+            else:
+                raise exceptions.UserError(
+                    "Canceled properties cannot be sold!")
+
+    def action_mark_as_canceled(self):
+        for record in self:
+            if record.state != 'sold':
+                record.state = 'canceled'
+            else:
+                raise exceptions.UserError(
+                    "Sold properties cannot be canceled!")

estate/models/estate_property_offer.py

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+from odoo import api, fields, models, exceptions
+from dateutil.relativedelta import relativedelta
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Estate property offer"
+    _order = "price desc"
+
+    price = fields.Float(string="Price")
+    status = fields.Selection(
+        copy=False,
+        selection=[
+            ('accepted', 'Accepted'),
+            ('refused', 'Refused'),
+        ],
+        string="Status",
+    )
+    partner_id = fields.Many2one(
+        'res.partner', string="Partner", required=True
+    )
+    property_id = fields.Many2one(
+        'estate.property', string="Property", required=True
+    )
+    validity = fields.Integer(default=7, string="Validity (Days)")
+    date_deadline = fields.Date(
+        compute="_compute_date_deadline",
+        inverse="_inverse_date_deadline",
+        string="Deadline",
+    )
+    property_type_id = fields.Many2one(
+        related="property_id.property_type_id", store=True
+    )
+
+    _check_price = models.Constraint(
+        'CHECK(price > 0)',
+        'The offer price of must be strictly positive!'
+    )
+
+    @api.depends('validity')
+    def _compute_date_deadline(self):
+        for record in self:
+            if record.create_date:
+                record.date_deadline = record.create_date + \
+                    relativedelta(days=record.validity)
+            else:
+                record.date_deadline = fields.Date.today() + relativedelta(days=record.validity)
+
+    def _inverse_date_deadline(self):
+        for record in self:
+            record.validity = (record.date_deadline -
+                               fields.Date.to_date(record.create_date)).days
+
+    @api.model
+    def create(self, vals_list):
+        for vals in vals_list:
+            related_property = self.env['estate.property'].browse(
+                vals['property_id'])
+            for offer in related_property.offer_ids:
+                if offer.price > vals['price']:
+                    raise exceptions.UserError(
+                        "This offer price is lower than the current ones")
+
+        return super().create(vals_list)
+
+    def action_accept_offer(self):
+        for record in self:
+            if record.status == 'accepted':
+                continue
+            for offer in record.property_id.offer_ids:
+                if offer.status == 'accepted':
+                    offer.status = 'refused'
+            record.status = 'accepted'
+            record.property_id.buyer_id = record.partner_id
+            record.property_id.selling_price = record.price
+            record.property_id.state = 'offer accepted'
+
+    def action_refuse_offer(self):
+        for record in self:
+            record.status = 'refused'

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class EstatePropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Estate property tag"
+    _order = "name"
+
+    name = fields.Char(required=True)
+    color = fields.Integer('Color')
+    _check_unique_tag_name = models.Constraint(
+        'UNIQUE(name)',
+        'This property tag already exists.'
+    )

estate/models/estate_property_type.py

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+from odoo import fields, models, api
+
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Estate property Tag"
+    _order = "sequence, name"
+
+    name = fields.Char(required=True)
+    sequence = fields.Integer('Sequence', default=1,
+                              help="Used to order stages, Lower is better.")
+    property_ids = fields.One2many('estate.property', 'property_type_id')
+    offer_ids = fields.One2many('estate.property.offer', 'property_type_id')
+    offer_count = fields.Integer(compute="_compute_offer_count")
+
+    _check_unique_type_name = models.Constraint(
+        'UNIQUE(name)',
+        'This property type already exists.'
+    )
+
+    @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 fields, models
+
+
+class ResUsers(models.Model):
+    _inherit = 'res.users'
+    _name = 'res.users'
+
+    property_ids = fields.One2many('estate.property', 'seller_id',
+                                   domain=['|', ('state', '=', 'new'), ('state', '=', '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_test_model,access_test_model,model_estate_property,base.group_user,1,1,1,1
+access_test_model2,access_test_model2,model_estate_property_type,base.group_user,1,1,1,1
+access_test_model3,access_test_model3,model_estate_property_tag,base.group_user,1,1,1,1
+access_test_model4,access_test_model4,model_estate_property_offer,base.group_user,1,1,1,1

estate/views/estate_menus.xml

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+<odoo>
+    <menuitem id="menu_real_estate" name="Real Estate" action="estate_property_action">
+        <menuitem id="menu_real_estate_settings" name="Settings">
+            <menuitem id="menu_real_estate_settings_property_types" name="Property Types" action="estate_property_type_action"/>
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_offers_views.xml

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+<odoo>   
+    <record id="estate_property_offers_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 decoration-success="status == 'accepted'" decoration-danger="status == 'refused'" editable="bottom" string="Offers">
+                <field name="price"/>
+                <field name="partner_id"/>
+                <field name="validity"/>
+                <field name="date_deadline"/>
+                <field name="property_id" nolabel="1"/> <!-- just to use it in the offer creation constraints-->
+                <button name="action_accept_offer" string=" " type="object" icon="fa-check" invisible="status"/>
+                <button name="action_refuse_offer" string=" " type="object" icon="fa-times" invisible="status"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="estate_property_offers_view_form" model="ir.ui.view">
+        <field name="name">estate.property.offerform</field>
+        <field name="model">estate.property.offer</field>
+        <field name="arch" type="xml">
+            <form string="Offers">
+                <sheet>
+                    <group>
+                        <field name="price"/>
+                    </group>
+                    <group>
+                        <field name="partner_id"/>
+                    </group>
+                    <group>
+                        <field name="validity"/>
+                    </group>
+                    <group>
+                        <field name="date_deadline"/>
+                    </group>
+                    <group>
+                        <field name="property_id" nolabel="1"/> <!-- it's invisible because I just need to load it to accept an offer before it's saved/-->
+                        <button name="action_accept_offer" string='accept' type="object" icon="fa-check" invisible="status"/>
+                        <button name="action_refuse_offer" string='reject' type="object" icon="fa-times" invisible="status"/>
+                    </group>
+                    <group>
+                        <field name="status" readonly="1"/>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <record id="estate_property_offer_action" model="ir.actions.act_window">
+        <field name="name">Estate 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>
+
+</odoo>