2D matrix for x2many fields

Use this widget by saying:

This assumes that my_field refers to a model with the fields x, y and value. If your fields are named differently, pass the correct names as attributes:

<field name="my_field" widget="x2many_2d_matrix" field_x_axis="my_field1" field_y_axis="my_field2" field_value="my_field3">
    <list>
        <field name="my_field"/>
        <field name="my_field1"/>
        <field name="my_field2"/>
        <field name="my_field3"/>
    </list>
</field>

You can pass the following parameters:

field_x_axis The field that indicates the x value of a point

field_y_axis The field that indicates the y value of a point

field_value Show this field as value

show_row_totals If field_value is a numeric field, it indicates if you want to calculate row totals. True by default

show_column_totals If field_value is a numeric field, it indicates if you want to calculate column totals. True by default

x_axis_clickable If the x axis field is a many2one field, render the values as links to the record in question

y_axis_clickable If the y axis field is a many2one field, render the values as links to the record in question

For the value field, you can set any attributes you'd set in a normal list view, ie if your value field is a many2one field and you want to disable creating records via this field, you'd write

<field name="my_field3" options="{'no_create': true}"/>

or if you want to have a custom domain or context

<field name="my_field3" domain="[('some_field', '=', my_field1)]" context="{'default_some_field': my_field1}" />

Note that to be able to refer to other fields than the ones used as coordinates or value, you have to add them inside the list node.

Example

You need a data structure already filled with values. Let's assume we want to use this widget in a wizard that lets the user fill in planned hours for one task per project per user. In this case, we can use project.task as our data model and point to it from our wizard. The crucial part is that we fill the field in the default function:

from odoo import fields, models

class MyWizard(models.TransientModel):
    _name = 'my.wizard'

    def _default_task_ids(self):
        # your list of project should come from the context, some selection
        # in a previous wizard or wherever else
        projects = self.env['project.project'].browse([1, 2, 3])
        # same with users
        users = self.env['res.users'].browse([1, 2, 3])
        return [
            (0, 0, {
                'name': 'Sample task name',
                'project_id': p.id,
                'user_id': u.id,
                'planned_hours': 0,
                'message_needaction': False,
                'date_deadline': fields.Date.today(),
            })
            # if the project doesn't have a task for the user,
            # create a new one
            if not p.task_ids.filtered(lambda x: x.user_id == u) else
            # otherwise, return the task
            (4, p.task_ids.filtered(lambda x: x.user_id == u)[0].id)
            for p in projects
            for u in users
        ]

    task_ids = fields.Many2many('project.task', default=_default_task_ids)

Now in our wizard, we can use:

<field name="task_ids" widget="x2many_2d_matrix" field_x_axis="project_id" field_y_axis="user_id" field_value="planned_hours">
    <list>
        <field name="task_ids"/>
        <field name="project_id"/>
        <field name="user_id"/>
        <field name="planned_hours"/>
    </list>
</field>