Base Many2many Custom Field
by Camptocamp https://github.com/OCA/server-tools , Odoo Community Association (OCA) https://github.com/OCA/server-toolsAvailability |
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Lines of code | 11 |
Technical Name |
base_m2m_custom_field |
License | AGPL-3 |
Website | https://github.com/OCA/server-tools |
Versions | 16.0 12.0 13.0 14.0 |
Base Many2many Custom Field
This module adds a new Many2many custom field with a create_table attribute.
Table of contents
Usage
Many2manyCustom field is useful when a direct access to the relational table is needed, for example to be editable in a dedicated tree view.
Let’s consider following models:
class MyModelA(models.Model): _name = 'my.model.a' my_model_b_ids = fields.Many2manyCustom( 'my.model.b', 'my_model_a_b_rel', 'my_model_a_id', 'my_model_b_id', create_table=False, ) class MyModelB(models.Model): _name = 'my.model.b' my_model_a_ids = fields.Many2manyCustom( 'my.model.a', 'my_model_a_b_rel', 'my_model_b_id', 'my_model_a_id', create_table=False, ) class MyModelABRel(models.Model): _name = 'my.model.a.b.rel' my_model_a_id = fields.Many2one( 'my.model.a', required=True, index=True, # Index is mandatory here ) my_model_b_id = fields.Many2one( 'my.model.b', required=True, index=True, # Index is mandatory here )
By setting create_table=False on the Many2manyCustom field, and using the relational table name, as _name for the relational model, we’re able to define a dedicated tree view for my.model.a.b.rel.
<record id="my_model_a_b_rel_tree_view" model="ir.ui.view"> <field name="name">my.model.a.b.rel.tree.view</field> <field name="model">my.model.a.b.rel</field> <field name="arch" type="xml"> <tree editable="top"> <field name="my_model_a_id" /> <field name="my_model_b_id" /> </tree> </field> </record>
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Credits
Authors
- Camptocamp
Contributors
- Akim Juillerat <akim.juillerat@camptocamp.com>
Maintainers
This module is maintained by the OCA.
OCA, or the Odoo Community Association, is a nonprofit organization whose mission is to support the collaborative development of Odoo features and promote its widespread use.
This module is part of the OCA/server-tools project on GitHub.
You are welcome to contribute. To learn how please visit https://odoo-community.org/page/Contribute.
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Very interesting possibilities
One question. In Odoo 11 and prior the ORM would completely replace all of the xxx_rel join table records using a (6, _, ids) form of update whenever the set of linked records was changed. Did this behavior change in Odoo 12+? If not then the most powerful potential of this addon is lost because metadata attached to the custom join table records would be lost whenever a new record was linked. If the join table records are preserved then this will be a very useful addon, so thanks.