Add mysql and pg specific attributes to Column#== and hash

2 files changed, 20 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
index e4cfe843a8..c5dd93ee89 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb
@@ -91,6 +91,13 @@ module ActiveRecord
           collation && !collation.match(/_ci$/)
         end
 
+        def ==(other)
+          super &&
+            collation == other.collation &&
+            strict == other.strict &&
+            extra == other.extra
+        end
+
         private
 
         # MySQL misreports NOT NULL column default when none is given.
@@ -109,6 +116,10 @@ module ActiveRecord
             raise ArgumentError, "#{type} columns cannot have a default value: #{default.inspect}"
           end
         end
+
+        def attributes_for_hash
+          super + [collation, strict, extra]
+        end
       end
 
       ##
diff --git a/activerecord/lib/active_record/connection_adapters/column.rb b/activerecord/lib/active_record/connection_adapters/column.rb
index 01f06af348..dd303c73d5 100644
--- a/activerecord/lib/active_record/connection_adapters/column.rb
+++ b/activerecord/lib/active_record/connection_adapters/column.rb
@@ -62,12 +62,19 @@ module ActiveRecord
           other.default == default &&
           other.cast_type == cast_type &&
           other.sql_type == sql_type &&
-          other.null == null
+          other.null == null &&
+          other.default_function == default_function
       end
       alias :eql? :==
 
       def hash
-        [self.class, name, default, cast_type, sql_type, null].hash
+        attributes_for_hash.hash
+      end
+
+      private
+
+      def attributes_for_hash
+        [self.class, name, default, cast_type, sql_type, null, default_function]
       end
     end
   end