[WIP]

service_event_base/__init__.py

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+from . import models
+from . import controllers

service_event_base/__manifest__.py

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+{
+    'name': 'Service Event Base',
+    'version': '1.0.0',
+    'summary': 'Base module for service event management',
+    'description': 'This module provides the foundational models and views for managing service events within the Odoo framework.',
+    'category': 'Services',
+    'depends': ['base', 'mail', 'event'],
+    'data': [
+        'views/event_service_menu_view.xml',
+        'views/event_service.xml',
+        'security/ir.model.access.csv'
+    ],
+    'installable': True,
+    'application': True,
+    'author': 'Garvish',
+    'license': 'LGPL-3',
+}

service_event_base/models/__init__.py

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+from . import event_registration
+from . import event_service

service_event_base/models/event_registration.py

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+from odoo import api, fields, models, _
+from odoo.exceptions import ValidationError
+
+
+class EventRegistration(models.Model):
+    _name = 'event.registrations'
+    _description = 'Event Registration'
+
+    attendee_name = fields.Char(string='Attendee Name', required=True)
+    partner_id = fields.Many2one('res.partner', string='Partner', index=True)
+    service_id = fields.Many2one('event.management', string='Event Service', ondelete='cascade', required=True)
+    state = fields.Selection([
+        ('draft', 'Draft'),
+        ('confirmed', 'Confirmed'),
+        ('cancelled', 'Cancelled')
+    ], string='Status', default='draft', required=True)
+    booking_date = fields.Datetime(string='Booking Date', default=fields.Datetime.now)
+    booking_amount = fields.Monetary(string='Booking Amount', currency_field='currency_id', compute='_compute_booking_amount', store=True, readonly=True)
+    currency_id = fields.Many2one('res.currency', string='Currency', related='service_id.currency_id', readonly=True)
+    company_id = fields.Many2one('res.company', string='Company', related='service_id.company_id', store=True, readonly=True)
+
+    _booking_service_check = models.Constraint(
+        'unique (service_id, partner_id)',
+        "Each partner can register only once for the same event service."
+    )
+
+    # Compute fields
+    @api.depends('service_id')
+    def _compute_booking_amount(self):
+        for record in self:
+            record.booking_amount = record.service_id.price
+
+    # Python constrains
+    @api.constrains('booking_date')
+    def _check_booking_date(self):
+        for record in self:
+            if record.booking_date and record.booking_date < fields.Datetime.now():
+                raise ValidationError(_("Booking date cannot be in the past."))

service_event_base/models/event_service.py

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+from odoo import api, fields, models, _
+
+
+class EventService(models.Model):
+    _name = 'event.management'
+    _description = 'Event Management Service'
+
+    name = fields.Char(string='Event Name', required=True)
+    description = fields.Html(string='Description')
+    price = fields.Monetary(string='Price', currency_field='currency_id')
+    active = fields.Boolean(string='Active', default=True)
+    # Many2one relationship to event type from odoo standard event module
+    event_type_id = fields.Many2one('event.type', string='Event Type', ondelete='set null', index=True)
+    tag_ids = fields.Many2many('event.tag', string='Tags', compute='_compute_tag_ids')
+    company_id = fields.Many2one('res.company', required=True, default=lambda self: self.env.company)
+    booking_ids = fields.One2many('event.registrations', 'service_id', string='Bookings')
+    # You are never going to use multi-currency in a single company or change it either.
+    currency_id = fields.Many2one('res.currency', string='Currency', default=lambda self: self.company_id.currency_id, readonly=True)
+
+    @api.depends('event_type_id')
+    def _compute_tag_ids(self):
+        """If you are changing the event type, also your tags are empty. In that
+        Case just assign the tags from event_type_id to current record. Already
+        done in standard event module."""
+        for record in self:
+            if not record.tag_ids and record.event_type_id:
+                record.tag_ids = record.event_type_id.tag_ids

service_event_base/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_event_management_user,access.event.management.user,model_event_management,base.group_user,1,1,1,1
+access_event_registrations_user,access.event.registrations.user,model_event_registrations,base.group_user,1,1,1,1

service_event_base/views/event_service.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="view_service_event_list" model="ir.ui.view">
+        <field name="name">event.management.list</field>
+        <field name="model">event.management</field>
+        <field name="arch" type="xml">
+            <list string="Service Events">
+                <field name="name"/>
+                <field name="company_id"/>
+                <field name="tag_ids"/>
+                <field name="event_type_id"/>
+            </list>
+        </field>
+    </record>
+
+    <record id="view_service_event_form" model="ir.ui.view">
+        <field name="name">event.management.form</field>
+        <field name="model">event.management</field>
+        <field name="arch" type="xml">
+            <form string="Service Event">
+                <sheet>
+                    <group>
+                        <field name="name"/>
+                        <field name="description"/>
+                        <field name="price" widget="monetary" options="{'currency_field': 'currency_id'}"/>
+                        <field name="company_id"/>
+                        <field name="tag_ids" widget="many2many_tags"/>
+                        <field name="event_type_id"/>
+                        <field name="booking_ids"/>
+                    </group>
+                </sheet>
+            </form>
+        </field>
+    </record>
+
+</odoo>

service_event_base/views/event_service_menu_view.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<odoo>
+
+    <record id="action_service_event_list" model="ir.actions.act_window">
+        <field name="name">Service Events</field>
+        <field name="res_model">event.management</field>
+        <field name="view_mode">list,form</field>
+        <field name="help" type="html">
+            <p class="o_view_nocontent_smiling_face">
+                No service events found. Create your first one!
+            </p>
+        </field>
+    </record>
+
+    <menuitem id="menu_service_event_base"
+        name="Event Services"
+        sequence="10"
+        web_icon="service_event_base,static/description/icon.png"/>
+
+    <menuitem
+        id="menu_service_events"
+        name="Service Events"
+        parent="menu_service_event_base"
+        sequence="10"
+        action="action_service_event_list"/>
+
+</odoo>