# Base Many2many Custom Field

This module adds a new Many2many custom field with a create_table attribute.

Table of contents

- Usage
- Bug Tracker
- Credits
  - Authors
  - Contributors
  - Maintainers

# 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>

# Bug Tracker

Bugs are tracked on GitHub Issues. In case of trouble, please check there if your issue has already been reported. If you spotted it first, help us to smash it by providing a detailed and welcomed feedback.

Do not contact contributors directly about support or help with technical issues.

# Credits

## Authors

- Camptocamp

## Contributors

- Akim Juillerat <akim.juillerat@camptocamp.com>
- Fernando La Chica <fernandolachica@gmail.com>
- Denis Roussel <denis.roussel@acsone.eu>

## 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.