[ADD] estate, estate_account: create Real Estate and Real Estate Account modules for managing real estate business.

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',
+        '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
+from odoo.exceptions import UserError
+from odoo.tools.float_utils import float_compare, float_is_zero
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "It's free real estate"
+
+    # Order attributes
+    _order = "id desc"
+
+    name = fields.Char(required=True,)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(
+        default=lambda self: 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,
+        )
+
+    # Reserved fields
+    active = fields.Boolean(default=True, string='Active',)
+
+    # 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",
+    )
+
+    # -------------------------------------------------------------------------
+    # SQL 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.',
+    )
+
+    # -------------------------------------------------------------------------
+    # COMPUTE METHODS
+    # -------------------------------------------------------------------------
+    @api.depends("living_area", "garden_area",)
+    def _compute_total_area(self,):
+        for property in self:
+            property.total_area = property.living_area + property.garden_area
+
+    @api.depends("offer_ids.price",)
+    def _compute_best_price(self,):
+        for property in self:
+            if property.offer_ids:
+                property.best_price = max(property.offer_ids.mapped("price"), default=0.0)
+            else:
+                property.best_price = 0.0
+
+    # -------------------------------------------------------------------------
+    # CONSTRAINTs METHODS
+    # -------------------------------------------------------------------------
+    @api.constrains('expected_price', 'selling_price',)
+    def _check_selling_price(self,):
+        for property in self:
+            # Selling price = 0 => Do nothing
+            if float_is_zero(property.selling_price, precision_digits=2):
+                continue
+
+            minimum_price = property.expected_price * 0.90
+
+            if float_compare(property.selling_price, minimum_price, precision_digits=2) < 0:
+                raise UserError(self.env._("The selling price cannot be lower than 90% of the expected price."))
+
+    # -------------------------------------------------------------------------
+    # 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
+
+    # -------------------------------------------------------------------------
+    # CRUD METHODS
+    # -------------------------------------------------------------------------
+    @api.ondelete(at_uninstall=False,)
+    def _unlink_except_new_or_canceled(self,):
+        for property in self:
+            if property.state not in ('new', 'canceled',):
+                raise UserError(self.env._("You can only delete properties that are New or Canceled."))
+
+    # -------------------------------------------------------------------------
+    # ACTIONS
+    # -------------------------------------------------------------------------
+    def action_sold(self,):
+        for property in self:
+            if property.state == 'canceled':
+                raise UserError(self.env._("You cannot sell a canceled property."))
+        self.state = 'sold'
+        return True
+
+    def action_cancel(self,):
+        for property in self:
+            if property.state == 'sold':
+                raise UserError(self.env._("You cannot cancel a sold property."))
+        self.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"
+
+    # Order attributes
+    _order = "price desc"
+
+    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,)
+    property_type_id = fields.Many2one(
+        "estate.property.type",
+        related="property_id.property_type_id",
+        string="Property Type",
+        store=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 or fields.Datetime.now()).date()
+            offer.date_deadline = base_date + timedelta(days=offer.validity,)
+
+    def _inverse_date_deadline(self,):
+        for offer in self:
+            base_date = (offer.create_date or fields.Datetime.now()).date()
+            if offer.date_deadline:
+                offer.validity = (offer.date_deadline - base_date).days
+
+    # -------------------------------------------------------------------------
+    # CRUD methods
+    # -------------------------------------------------------------------------
+    @api.model_create_multi
+    def create(self, vals_list,):
+        for vals in vals_list:
+            property_record = self.env['estate.property'].browse(vals['property_id'])
+
+            if property_record.offer_ids:
+                best_price = max(property_record.offer_ids.mapped('price'))
+                if vals.get('price', 0) < best_price:
+                    raise UserError(self.env._("You cannot create an offer with a price lower than the current best offer."))
+
+            property_record.state = 'offer_received'
+
+        return super().create(vals_list)
+
+    # -------------------------------------------------------------------------
+    # ACTIONS
+    # -------------------------------------------------------------------------
+    def action_accept(self,):
+        for offer in self:
+            if offer.property_id.state in ('sold', 'canceled',):
+                raise UserError(self.env._("You cannot accept an offer on a sold or canceled property."))
+
+            if offer.property_id.offer_ids.filtered(lambda o: o.status == "accepted"):
+                raise UserError(self.env._("An offer has already been accepted for this property."))
+
+            offer.status = 'accepted'
+            offer.property_id.selling_price = offer.price
+            offer.property_id.buyer_id = offer.partner_id
+
+            other_offers = offer.property_id.offer_ids - offer
+            other_offers.status = 'refused'
+
+        return True
+
+    def action_refuse(self,):
+        for offer in self:
+            if offer.property_id.state in ('sold', 'canceled',):
+                raise UserError(self.env._("You cannot refuse an offer on a sold or canceled property."))
+
+        self.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"
+
+    # Order attributes
+    _order = "name"
+
+    name = fields.Char(required=True,)
+    color = fields.Integer(string="Color",)
+
+    # -------------------------------------------------------------------------
+    # 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 api, fields, models
+
+class EstatePropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Property's type"
+
+    # Order attributes
+    _order = "sequence, name"
+
+    name = fields.Char(required=True,)
+
+    sequence = fields.Integer(string="Sequence", default=1, help="Used to order stages. Lower is better.",)
+
+    # Relations
+    property_ids = fields.One2many(
+        "estate.property", 
+        "property_type_id", 
+        string="Properties",
+    )
+
+    offer_ids = fields.One2many(
+        "estate.property.offer", 
+        "property_type_id", 
+        string="Offers",
+    )
+
+    # -------------------------------------------------------------------------
+    # COMPUTED FIELDS
+    # -------------------------------------------------------------------------
+    offer_count = fields.Integer(
+        string="Offers Count", 
+        compute="_compute_offer_count",
+    )
+
+
+    # -------------------------------------------------------------------------
+    # CONSTRAINTS
+    # -------------------------------------------------------------------------
+    _unique_type_name = models.Constraint(
+        'UNIQUE(name)', 
+        'A property type name must be unique.',
+    )
+
+
+    @api.depends('offer_ids')
+    def _compute_offer_count(self):
+        for property_type in self:
+            property_type.offer_count = len(property_type.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="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
+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>