Group by feature for Many2Many Odoo Fields

One of the most essential applications of the Many2Many field in Odoo development is to allow entries in models to have associations with other tables. However, developers struggle to group records based on many2many fields. In this post, we will look at how to improve the use of Many2Many fields in Odoo 17, specifically how to utilize Group By efficiently.

What is Many2Many Odoo Fields

However, before you proceed with the grouping, you must first comprehend the fundamentals of Many2Many fields. These variables are used to define the relationship between one record and several records in their model or multiple records in another model. Unlike Many2Many fields, which provide many-to-many interactions, Many2One fields give many-to-one relationships, making the model design considerably simpler and more versatile in the data model.

Step-by-Step Implementation

Assume you have a sales order model with a Many2Many variable named tag_ids that contains several tags for each order. Your purpose is to enable the grouping of sales orders based on these tags.

1 Define the computed field.

First, build a calculated field with the aggregated tag names for each sales order. In this example, let’s call it product_tags.

product_tags = fields.Char(string='Tags', compute='_get_tags', store=True)

2 Implement the Computed Method

Next, write a calculated method that fills the product_tags field with a comma-separated string of tag names

@api.model
    @api.depends('tag_ids')
    def _get_tags(self):
        for rec in self:
            if rec.tag_ids:
                product_tags = ','.join([p.name for p in rec.tag_ids])
            else:
                product_tags = ''
            rec.product_tags = product_tags

3 Update the View

Finally, update the corresponding XML view to include the product_tags field and enable the Group By functionality

<?xml version=”1.0″ encoding=”utf-8″?>

<odoo>

   <record id=”view_order_form” model=”ir.ui.view”>

       <field name=”name”>sale.order.view.form.inherit.custom_module</field>

       <field name=”model”>sale.order</field>

        <field name=”inherit_id” ref=”sale.view_order_form”/>

        <field name=”arch” type=”xml”>

              <xpath expr=”//field[@name=’payment_term_id’]” position=”after”>

                 <field name=”product_tags”/>

              </xpath>

        </field>

   </record>

   <record id=”view_sales_order_filter” model=”ir.ui.view”>

        <field name=”name”>sale.order.view.list.inherit.custom_module</field>

       <field name=”model”>sale.order</field>

       <field name=”inherit_id” ref=”sale.view_sales_order_filter”/>

       <field name=”arch” type=”xml”>

       <xpath expr=”//search/group/filter[@name=’customer’]”

                     position=”after”>

                <separator/>

                  <filter name=”tag_ids” string=”Tags” domain=”[]”

                          context=”{‘group_by’: ‘product_tags’}”/>

              <separator/>

             </xpath>

      </field>

   </record>

</odoo>

With these changes in place, users can now group sales orders by the product_tags field, effectively grouping them based on the associated tags.

here is the group by tags

Learning the ideal use case for Many2Many fields and how to utilize the Group by feature in Odoo 17 will not only enhance data organization but also provide superior insights. With the advice provided in this comprehensive book, you should be well-prepared to break free from the constraints of the past and properly embrace the potential of Many2Many fields in your Odoo development efforts.

To simplify grouping and filtering, you should utilize calculated fields, develop efficient computed methods, and update the views accordingly. Furthermore, using OOP ideas, coding standards, and collaborative programming will improve your Odoo development abilities and allow you to design a foundational and scalable code for any project. for more blogs visit our website