Allow bulk-delete, merge for Brands table

tailbone/templates/master/index.mako

@@ -147,7 +147,7 @@
   % if master.mergeable and request.has_perm('{}.merge'.format(permission_prefix)):
 
       % if use_buefy:
-      ${h.form(url('{}.merge'.format(route_prefix)), **{'@submit': 'submitMergeForm'})}
+      ${h.form(url('{}.merge'.format(route_prefix)), class_='control', **{'@submit': 'submitMergeForm'})}
       % else:
       ${h.form(url('{}.merge'.format(route_prefix)), name='merge-things')}
       % endif

tailbone/views/brands.py

@@ -37,6 +37,16 @@ class BrandsView(MasterView):
     """
     model_class = model.Brand
     has_versions = True
+    bulk_deletable = True
+
+    mergeable = True
+    merge_additive_fields = [
+        'product_count',
+    ]
+    merge_fields = merge_additive_fields + [
+        'uuid',
+        'name',
+    ]
 
     grid_columns = [
         'name',
@@ -60,6 +70,26 @@ class BrandsView(MasterView):
         # confirmed
         g.set_type('confirmed', 'boolean')
 
+    def get_merge_data(self, brand):
+        product_count = self.Session.query(model.Product)\
+                                    .filter(model.Product.brand == brand)\
+                                    .count()
+        return {
+            'uuid': brand.uuid,
+            'name': brand.name,
+            'product_count': product_count,
+        }
+
+    def merge_objects(self, removing, keeping):
+        products = self.Session.query(model.Product)\
+                               .filter(model.Product.brand == removing)\
+                               .all()
+        for product in products:
+            product.brand = keeping
+
+        self.Session.flush()
+        self.Session.delete(removing)
+
 
 class BrandsAutocomplete(AutocompleteView):