[MIG] web_widget_x2many_2d_matrix_example: Migration to 12.0.

web_widget_x2many_2d_matrix_example/wizard/x2m_matrix.py

@@ -0,0 +1,29 @@
+# License AGPL-3.0 or later (http://www.gnu.org/licenses/agpl).
+from odoo import fields, models
+
+
+class X2mMatrixDemoWiz(models.TransientModel):
+    _name = 'x2m.matrix.demo.wiz'
+    _description = 'X2Many Matrix Demo Wizard'
+
+    line_ids = fields.Many2many(
+        'x2m.demo.line', default=lambda self: self._default_line_ids())
+
+    def _default_line_ids(self):
+        recs = self.env['x2m.demo'].search([])
+        # same with users
+        users = self.env['x2m.demo.line'].search([]).mapped('user_id')
+        return [
+            (0, 0, {
+                'name': "{}'s task on {}".format(usr.name, rec.name),
+                'demo_id': rec.id,
+                'user_id': usr.id,
+                'value': 0,
+            })
+            # if the project doesn't have a task for the user, create a new one
+            if not rec.line_ids.filtered(lambda x: x.user_id == usr) else
+            # otherwise, return the task
+            (4, rec.line_ids.filtered(lambda x: x.user_id == usr)[0].id)
+            for rec in recs
+            for usr in users
+        ]