Delegation Inheritance In Odoo 14
DELEGATION INHERITANCE
In Odoo, we use ‘_inherits’ attribute for delegation inheritance. The purpose is for extending a model with your new model without affecting it’s views. So, the database tables will contain fields in your model and also a field representing the inherited object.
This blog will provide insight on How to use Delegation inheritance in odoo 14
DELEGATION INHERITANCE IN ODOO 14
*: Create a existing class in models directory python file and add fields
Syntax as follows:
class<ClassName>(models.Model):”
_name=”existing model name”
<field name>=fields.<type>(string='<label name>’)
*: Now you need to create one child class for extending the existing class
eg: class<ClassName>(models.Model):”
_name=”new model name”
_inherit={‘existing model name’:’many2one field name‘}
<field name>=fields.<type>(string='<label name>’)
field_name = fields.Many2one(‘estimate.contract’, ‘Estimate Id’, required=True, ondelete=”cascade”)
- *: Here one many2one field is mandatory to connect with parent class;while inheriting the parent class we have to give the many2one field.
In practical case:
class EstimateContract(models.Model):
_name = ‘estimate.contract’
p_type = fields.Many2one(‘res.partner’)
location = fields.Char()
class SampleModel(models.Model):
_name = ‘sample.model’
_inherits = {‘estimate.contract’: ‘estimate_id’}
name = fields.Char(‘Engineer’)
estimate_id = fields.Many2one(‘estimate.contract’, ‘Estimate Id’, required=True, ondelete=”cascade”)
- Here estimate_id is the Many2one field
*: Now create a corresponding xml file in views
Syntax as follows:
<record id=”record _id” model=”ir.ui.view”>
<field name=”name”>mension any name</field>
<field name=”model”>new model name</field>
<field name=”arch” type=”xml”>
<form>
<sheet>
<group>
<field name=”field”/>
</group>
</sheet>
</form>
</field>
</record>
In practical case:
<record id=”sample_id” model=”ir.ui.view”>
<field name=”name”>sample.model</field>
<field name=”model”>sample.model</field>
<field name=”arch” type=”xml”>
<form>
<sheet>
<group>
<field name=”name”/>
<field name=”estimate_id” required=”0″/>
<field name=”location”/>
</group>
</sheet>
</form>
</field>
</record>
- Here you can add field in ‘estimate.contract’ model which stores same value in both views
- do not forget to add xml file in __manifest__.py then run the module
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