[IMP] Estate: Enhance property management with relations, views, and access

estate/__init__.py

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+from . import models

estate/__manifest__.py

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+{
+    'name': 'Real Estate',
+    'category': 'Real Estate',
+    'version': '1.0',
+    'author': 'Radhey Detroja(RADET)',
+    'license': 'LGPL-3',
+    'summary': 'Manage real estate properties',
+    'depends': ['base'],
+    'application': True,
+    'data': [
+        'security/ir.model.access.csv',
+        'views/estate_property_views.xml',
+        'views/estate_property_offer_views.xml',
+        'views/estate_property_type_views.xml',
+        'views/estate_property_tag_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
+from . import res_users

estate/models/estate_property.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import _, api, exceptions, fields, models
+from odoo.tools.float_utils import float_compare, float_is_zero
+
+
+class EstateProperty(models.Model):
+    _name = "estate.property"
+    _description = "Estate Property Model"
+    _order = "id desc"
+
+    name = fields.Char(required=True)
+    description = fields.Text()
+    postcode = fields.Char()
+    date_availability = fields.Date(
+        copy=False,
+        default=lambda self: fields.Date.today() + relativedelta(months=3),
+    )
+    expected_price = fields.Float(required=True)
+    selling_price = fields.Float(
+        readonly=True,
+        copy=False,
+    )
+    best_price = fields.Float(compute="_compute_best_price", string="Best Offer")
+    bedrooms = fields.Integer(default=2)
+    living_area = fields.Integer()
+    facades = fields.Integer()
+    garage = fields.Boolean()
+    garden = fields.Boolean()
+    garden_area = fields.Integer()
+    active = fields.Boolean(default=True)
+    garden_orientation = fields.Selection(
+        [('north', 'North'), ('south', 'South'), ('east', 'East'), ('west', 'West')]
+    )
+    total_area = fields.Integer(compute="_compute_total_area", string="Total Area (sqm)")
+    state = fields.Selection(
+        [
+            ('new', 'New'),
+            ('offer_received', 'Offer Received'),
+            ('offer_accepted', 'Offer Accepted'),
+            ('sold', 'Sold'),
+            ('cancelled', 'Cancelled'),
+        ],
+        required=True,
+        copy=False,
+        default='new',
+    )
+    property_type_id = fields.Many2one("estate.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")
+
+    _expected_price_positive = models.Constraint(
+        'CHECK(expected_price > 0)',
+        'The expected price 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 or 0) + (record.garden_area or 0)
+
+    @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 = None
+
+    def action_sold(self):
+        if self.filtered(lambda r: r.state == 'cancelled'):
+            raise exceptions.UserError(_("Cancelled properties cannot be sold."))
+        self.write({'state': 'sold'})
+        return True
+
+    def action_cancel(self):
+        if self.filtered(lambda x: x.state == 'sold'):
+            raise exceptions.UserError(_("Sold properties cannot be cancelled."))
+        self.write({'state': 'cancelled'})
+        return True
+
+    @api.constrains("selling_price", "expected_price", "buyer_id")
+    def _check_selling_price(self):
+        for record in self:
+            if float_is_zero(record.selling_price, precision_digits=2):
+                if record.buyer_id:
+                    raise exceptions.ValidationError("The selling price must be greater than 0.")
+                continue
+            if float_compare(record.selling_price, 0.0, precision_digits=2) <= 0:
+                raise exceptions.ValidationError("The selling price must be positive.")
+            min_selling_price = record.expected_price * 0.9
+            if float_compare(record.selling_price, min_selling_price, precision_digits=2) < 0:
+                raise exceptions.ValidationError(
+                    f"Minimum selling price: {min_selling_price:.2f}"
+                )
+
+    @api.ondelete(at_uninstall=False)
+    def _unlink_if_not_new_or_cancelled(self):
+        forbidden = self.filtered(lambda r: r.state not in ("new", "cancelled"))
+        if forbidden:
+            raise exceptions.UserError(_("Only properties in 'New' or 'Cancelled' state can be deleted."))

estate/models/estate_property_offer.py

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+from dateutil.relativedelta import relativedelta
+
+from odoo import _, api, exceptions, fields, models
+
+
+class EstatePropertyOffer(models.Model):
+    _name = "estate.property.offer"
+    _description = "Estate Property Offer Model"
+    _order = "price desc"
+
+    price = fields.Float()
+    status = fields.Selection(
+        [
+            ('accepted', 'Accepted'),
+            ('refused', 'Refused'),
+        ],
+        copy=False,
+    )
+    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", store=True, string="Property Type")
+    validity = fields.Integer(default=7)
+    date_deadline = fields.Date(compute="_compute_date_deadline", inverse="_inverse_date_deadline", store=True)
+
+    _offer_price_positive = models.Constraint(
+        'CHECK(price > 0)',
+        'The offer price must be strictly positive.',
+    )
+
+    @api.model
+    def create(self, vals_list):
+        for vals in vals_list:
+            property_id = vals.get("property_id")
+            price = vals.get("price", 0.0)
+            if property_id:
+                property_record = self.env["estate.property"].browse(property_id)
+                if property_record:
+                    existing_prices = property_record.offer_ids.mapped("price")
+                    if existing_prices and price < max(existing_prices):
+                        raise exceptions.UserError(_("You cannot create an offer with a lower amount than an existing offer."))
+        offers = super().create(vals_list)
+        properties = offers.mapped("property_id").filtered(lambda p: p.state == "new")
+        if properties:
+            properties.write({"state": "offer_received"})
+        return offers
+
+    @api.depends("create_date", "validity")
+    def _compute_date_deadline(self):
+        for record in self:
+            if record.create_date:
+                record.date_deadline = record.create_date.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:
+            if record.date_deadline and record.create_date:
+                delta = record.date_deadline - record.create_date.date()
+                record.validity = delta.days
+            elif record.date_deadline:
+                delta = record.date_deadline - fields.Date.today()
+                record.validity = delta.days
+
+    def action_accept(self):
+        for record in self:
+            if record.property_id.buyer_id:
+                raise exceptions.UserError(_("An offer has already been accepted for this property."))
+            record.status = "accepted"
+            other_offers = record.property_id.offer_ids.filtered(lambda o: o.id != record.id)
+            other_offers.write({"status": "refused"})
+            record.property_id.selling_price = record.price
+            record.property_id.buyer_id = record.partner_id
+            record.property_id.state = "offer_accepted"
+        return True
+
+    def action_refuse(self):
+        for record in self:
+            if record.property_id.buyer_id == record.partner_id and record.property_id.state == "offer_accepted":
+                other_offers = record.property_id.offer_ids - record
+                has_other_offers = other_offers.filtered(lambda o: o.status != "refused")
+                record.property_id.write({
+                    'selling_price': 0.0,
+                    'buyer_id': False,
+                    'state': 'offer_received' if has_other_offers else 'new'
+                })
+            record.status = "refused"
+        return True

estate/models/estate_property_tag.py

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+from odoo import fields, models
+
+
+class PropertyTag(models.Model):
+    _name = "estate.property.tag"
+    _description = "Property Tags"
+    _order = "name"
+
+    name = fields.Char(string="Name")
+    color = fields.Integer(string="Color")
+
+    _tag_name_unique = models.Constraint(
+        'UNIQUE(name)',
+        'The property tag name must be unique.',
+    )

estate/models/estate_property_type.py

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+from odoo import api, fields, models
+
+
+class PropertyType(models.Model):
+    _name = "estate.property.type"
+    _description = "Defines types of property"
+    _order = "sequence, name"
+
+    name = fields.Char(string="Name", required=True)
+    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(compute="_compute_offer_count", string="Number of Offers")
+    sequence = fields.Integer(string="Sequence", default=1)
+
+    _type_name_unique = models.Constraint(
+        'UNIQUE(name)',
+        'The property type name must be unique.',
+    )
+
+    @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"
+
+    property_ids = fields.One2many(
+        "estate.property",
+        "salesperson_id",
+        string="Active Properties",
+        domain=[('active', '=', True)],
+    )

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"?>
+<odoo>
+    <menuitem id="estate_menu_root" name="Real Estate">
+        <menuitem id="estate_properties_menu" name="Properties">
+            <menuitem id="estate_properties_menu_action" action="estate_property_action" />
+        </menuitem>
+        <menuitem id="estate_setting" name="Setting">
+            <menuitem id="estate_setting_type_action" action="estate_property_type_action" />
+            <menuitem id="estate_properties_menu_tag" action="estate_property_tag_action" />
+        </menuitem>
+    </menuitem>
+</odoo>

estate/views/estate_property_offer_views.xml

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+<?xml version="1.0" encoding="UTF-8"?>
+<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="Offers" editable="bottom" decoration-danger="status == 'refused'" decoration-success="status == 'accepted'">
+                <field name="price" />
+                <field name="partner_id" />
+                <field name="validity" />
+                <field name="date_deadline" />
+            </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 Form">
+                <sheet>
+                    <group>
+                        <field name="price" />
+                        <field name="partner_id" />
+                        <field name="validity" />
+                        <field name="date_deadline" />
+                        <field name="status" />
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+    <record id="estate_property_offer_action" model="ir.actions.act_window">
+        <field name="name">Offers</field>
+        <field name="res_model">estate.property.offer</field>
+        <field name="view_mode">list,form</field>
+    </record>
+</odoo>

estate/views/estate_property_tag_views.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+    <record id="estate_property_tag_action" model="ir.actions.act_window">
+        <field name="name">Tag Name</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="Type" />
+            </list>
+        </field>
+    </record>
+</odoo>