[FIX] mrp: manufacturing vignette in inventory dashboard

When clicking on the "manufacturing" vignette in the inventory
dashboard, the records were not filtered correctly (example: add a new
warehouse, a new "manufacturing" vignette appears for this warehouse in
the inventory dashboard, clicking on it would display the MO of all the
warehouses).

With this fix, as with the pickings, it will only show the count of MO
filtered to that specific picking type in the vignette, and clicking on
it will displayed the filtered ones.

We implementent the method of the compute field the same way the similar
method for the picking is implemented.

fixes #15008

addons/mrp/models/stock_picking.py

@@ -16,12 +16,15 @@ class StockPickingType(models.Model):
         mrp_picking_types = self.filtered(lambda picking: picking.code == 'mrp_operation')
         if not mrp_picking_types:
             return
-
-        MrpProduction = self.env['mrp.production']
-        count_mo_waiting = MrpProduction.search_count([('availability', '=', 'waiting')])
-        count_mo_todo = MrpProduction.search_count([('state', 'in', ('confirmed', 'planned', 'progress'))])
-        count_mo_late = MrpProduction.search_count(['&', ('date_planned_start', '<', fields.Date.today()), ('state', '=', 'confirmed')])
-        for picking in mrp_picking_types:
-            picking.count_mo_waiting = count_mo_waiting
-            picking.count_mo_todo = count_mo_todo
-            picking.count_mo_late = count_mo_late
+        domains = {
+            'count_mo_waiting': [('availability', '=', 'waiting')],
+            'count_mo_todo': [('state', 'in', ('confirmed', 'planned', 'progress'))],
+            'count_mo_late': [('date_planned_start', '<', fields.Date.today()), ('state', '=', 'confirmed')],
+        }
+        for field in domains:
+            data = self.env['mrp.production'].read_group(domains[field] +
+                [('state', 'not in', ('done', 'cancel')), ('picking_type_id', 'in', self.ids)],
+                ['picking_type_id'], ['picking_type_id'])
+            count = dict(map(lambda x: (x['picking_type_id'] and x['picking_type_id'][0], x['picking_type_id_count']), data))
+            for record in mrp_picking_types:
+                record[field] = count.get(record.id, 0)

addons/mrp/views/mrp_production_views.xml

@@ -307,7 +307,8 @@
             <field name="view_mode">tree,form</field>
             <field name="view_id" eval="False"/>
             <field name="search_view_id" ref="view_mrp_production_filter"/>
-            <field name="context">{}</field>
+            <field name="domain">[('picking_type_id', '=', active_id)]</field>
+            <field name="context">{'default_picking_type_id': active_id}</field>
         </record>