Move logic for "bulk-delete row objects" into MasterView

i guess so far it has only been needed for batch, but some day surely
it will be needed for something else..?

some of the template logic is still batch only i think..

tailbone/views/batch/core.py

@@ -1264,22 +1264,19 @@ class BatchMasterView(MasterView):
         """
         self.handler.do_remove_row(row)
 
-    def bulk_delete_rows(self):
+    def delete_row_objects(self, rows):
-        """
+        deleted = super(BatchMasterView, self).delete_row_objects(rows)
-        "Delete" all rows matching the current row grid view query.  This sets
-        the ``removed`` flag on the rows but does not truly delete them.
-        """
         batch = self.get_instance()
-        query = self.get_effective_row_data(sort=False)
 
-        # TODO: this should surely be handled by the handler...
+        # decrement rowcount for batch
         if batch.rowcount is not None:
-            batch.rowcount -= query.count()
+            batch.rowcount -= deleted
-        query.update({'removed': True}, synchronize_session=False)
+
+        # refresh batch status
         self.Session.refresh(batch)
         self.handler.refresh_batch_status(batch)
 
-        return self.redirect(self.get_action_url('view', batch))
+        return deleted
 
     def execute(self):
         """
@@ -1505,14 +1502,6 @@ class BatchMasterView(MasterView):
             config.add_tailbone_permission(permission_prefix, '{}.refresh'.format(permission_prefix),
                                            "Refresh data for {}".format(model_title))
 
-        # bulk delete rows
-        if cls.rows_bulk_deletable:
-            config.add_route('{}.delete_rows'.format(route_prefix), '{}/{{uuid}}/rows/delete'.format(url_prefix))
-            config.add_view(cls, attr='bulk_delete_rows', route_name='{}.delete_rows'.format(route_prefix),
-                            permission='{}.delete_rows'.format(permission_prefix))
-            config.add_tailbone_permission(permission_prefix, '{}.delete_rows'.format(permission_prefix),
-                                           "Bulk-delete data rows from {}".format(model_title))
-
         # toggle complete
         config.add_route('{}.toggle_complete'.format(route_prefix), '{}/{{{}}}/toggle-complete'.format(url_prefix, model_key))
         config.add_view(cls, attr='toggle_complete', route_name='{}.toggle_complete'.format(route_prefix),

tailbone/views/master.py

@@ -4182,6 +4182,30 @@ class MasterView(View):
         self.delete_row_object(row)
         return self.redirect(self.get_action_url('view', self.get_parent(row)))
 
+    def bulk_delete_rows(self):
+        """
+        Delete all row objects matching the current row grid query.
+        """
+        obj = self.get_instance()
+        rows = self.get_effective_row_data(sort=False).all()
+
+        # TODO: this should use a separate thread with progress
+        self.delete_row_objects(rows)
+        self.Session.refresh(obj)
+
+        return self.redirect(self.get_action_url('view', obj))
+
+    def delete_row_objects(self, rows):
+        """
+        Perform the actual deletion of given row objects.
+        """
+        deleted = 0
+        for row in rows:
+            if self.row_deletable(row):
+                self.delete_row_object(row)
+                deleted += 1
+        return deleted
+
     def get_parent(self, row):
         raise NotImplementedError
 
@@ -4940,6 +4964,22 @@ class MasterView(View):
                 config.add_view(cls, attr='create_row', route_name='{}.create_row'.format(route_prefix),
                                 permission='{}.create_row'.format(permission_prefix))
 
+        # bulk-delete rows
+        # nb. must be defined before view_row b/c of url similarity
+        if cls.rows_bulk_deletable:
+            config.add_tailbone_permission(permission_prefix,
+                                           '{}.delete_rows'.format(permission_prefix),
+                                           "Bulk-delete {} from {}".format(
+                                               row_model_title_plural, model_title))
+            config.add_route('{}.delete_rows'.format(route_prefix),
+                             '{}/rows/delete'.format(instance_url_prefix),
+                             # TODO: should enforce this
+                             # request_method='POST'
+            )
+            config.add_view(cls, attr='bulk_delete_rows',
+                            route_name='{}.delete_rows'.format(route_prefix),
+                            permission='{}.delete_rows'.format(permission_prefix))
+
         # view row
         if cls.has_rows:
             if cls.rows_viewable: