Creating Odoo Models

Steps

1. •

   Create the Python file in models/ directory (e.g. models/my_model.py).

2. •

   Define the model class:

   python

   from odoo import models, fields, api, _
   from odoo.exceptions import ValidationError
   
   class MyModel(models.Model):
       _name = 'my.model'
       _description = 'My Model'
       _order = 'sequence, name'
   
       name = fields.Char(string='Name', required=True)
       sequence = fields.Integer(default=10)
       active = fields.Boolean(default=True)
       state = fields.Selection([
           ('draft', 'Draft'),
           ('confirmed', 'Confirmed'),
           ('done', 'Done'),
       ], default='draft', string='Status', tracking=True)
       partner_id = fields.Many2one('res.partner', string='Partner')
       line_ids = fields.One2many('my.model.line', 'model_id', string='Lines')
       tag_ids = fields.Many2many('my.model.tag', string='Tags')
       total = fields.Float(compute='_compute_total', store=True)
   
       @api.depends('line_ids.amount')
       def _compute_total(self):
           for record in self:
               record.total = sum(record.line_ids.mapped('amount'))
   
       @api.constrains('name')
       def _check_name(self):
           for record in self:
               if record.name and len(record.name) < 3:
                   raise ValidationError(_("Name must be at least 3 characters."))
   
       def action_confirm(self):
           self.write({'state': 'confirmed'})
   

3. •

   Register in __init__.py: Add from . import my_model in models/__init__.py.

4. •

   Add to manifest: Ensure models/ is imported in the module's root __init__.py.

5. •

   Add security: Create ACL in security/ir.model.access.csv.

6. •

   Create views: Add form and list views in views/my_model_views.xml.

Checklist

• • _name and _description set
• • Fields defined with proper types and attributes
• • Computed fields have @api.depends
• • Constraints use @api.constrains
• • Model registered in __init__.py chain
• • ACL entry in ir.model.access.csv
• • Views created (at minimum form + list)
• • Added to __manifest__.py data list