feat: improve location restriction logic by expanding context key support and adding fallback to default source location

models/stock_location.py

@@ -12,26 +12,45 @@ class StockLocation(models.Model):
         """
         Helper to retrieve allowed locations based on the current context (picking type).
         Used by UI-level overrides in StockQuant and StockLot.
+        Returns:
+            list: IDs of allowed locations.
+            False: If no restriction should be applied (e.g. no picking type found).
         """
         ctx = self.env.context
         # 1. Identify the Picking Type (Operation Type)
-        picking_type_id = ctx.get('default_picking_type_id') or ctx.get('picking_type_id')
+        # Check multiple common context keys used by stock/mrp models
+        picking_type_id = (ctx.get('default_picking_type_id') or 
+                          ctx.get('picking_type_id') or 
+                          ctx.get('active_picking_type_id'))
         
-        # 2. Support for Manufacturing Orders: if we have an MO ID but no picking type, find it.
+        # 2. Advanced MO Support: find picking type from MO ID if needed
-        if not picking_type_id and ctx.get('active_mo_id'):
+        mo_id = (ctx.get('active_mo_id') or 
-            mo = self.env['mrp.production'].browse(ctx.get('active_mo_id'))
+                 ctx.get('default_mo_id') or 
+                 ctx.get('default_production_id') or 
+                 ctx.get('mo_id') or 
+                 ctx.get('production_id'))
+                 
+        if not picking_type_id and mo_id:
+            mo = self.env['mrp.production'].browse(mo_id)
             if mo.exists():
                 picking_type_id = mo.picking_type_id.id
 
         if not picking_type_id:
-            return []
+            # NO identification of operation type = NO restriction (safe fallback)
+            return False
 
         # 3. Retrieve allowed locations from the picking type
         picking_type = self.env['stock.picking.type'].browse(picking_type_id)
-        if picking_type.exists() and picking_type.default_location_src_ids:
+        if picking_type.exists():
+            # Priority 1: Use the M2M "Allowed Source Locations" if set
+            if picking_type.default_location_src_ids:
                 return picking_type.default_location_src_ids.ids
             
-        return []
+            # Priority 2: Fallback to the primary "Default Source Location" (M2O)
+            if picking_type.default_location_src_id:
+                return [picking_type.default_location_src_id.id]
+            
+        return False
 
 class StockQuant(models.Model):
     _inherit = 'stock.quant'
@@ -40,14 +59,12 @@ class StockQuant(models.Model):
     def web_search_read(self, domain, specification, offset=0, limit=None, order=None, count_limit=None):
         """
         UI-SURFACE OVERRIDE: Applies location filtering ONLY for the web interface.
-        This method is called by the M2M Catalog and list view searches.
-        Internal search() and _gather() will NOT be affected.
         """
         ctx = self.env.context
         if not ctx.get('skip_location_restriction') and ctx.get('uid'):
             allowed_location_ids = self.env['stock.location']._get_allowed_locations()
             if allowed_location_ids:
-                # Add location filter to the domain
+                # Add location filter to the domain ONLY if we have an explicit list
                 domain = expression.AND([domain, [('location_id', 'in', allowed_location_ids)]])
                 
         return super().web_search_read(domain, specification, offset=offset, limit=limit, order=order, count_limit=count_limit)
@@ -59,19 +76,17 @@ class StockLot(models.Model):
     def name_search(self, name='', args=None, operator='ilike', limit=100):
         """
         UI-SURFACE OVERRIDE: Filters the many2one lot selection dropdown.
-        This is ONLY used by the web client for autocomplete/dropdown lookups.
         """
         ctx = self.env.context
         if not ctx.get('skip_location_restriction') and ctx.get('uid'):
             allowed_location_ids = self.env['stock.location']._get_allowed_locations()
             
-            # If no explicit mapping found on the picking type, 
+            # If our custom helper failed to find a picking-type restriction,
-            # check if a default_location_id was passed to the view context.
+            # we check if a simple default_location_id filter was passed directly.
             if not allowed_location_ids and ctx.get('default_location_id'):
                 allowed_location_ids = [ctx.get('default_location_id')]
 
             if allowed_location_ids:
-                # Find quants in the allowed locations that have positive stock for this product
                 quant_domain = [
                     ('location_id', 'in', allowed_location_ids),
                     ('quantity', '>', 0),
@@ -81,8 +96,6 @@ class StockLot(models.Model):
                 if product_id:
                     quant_domain.append(('product_id', '=', product_id))
                 
-                # We sudo() the quant search to ensure we find quants even if there are record rules,
-                # as this is strictly for filtering the UI dropdown.
                 quants = self.env['stock.quant'].with_context(skip_location_restriction=True).sudo().search(quant_domain)
                 lot_ids = quants.mapped('lot_id').ids