Ensure we always use instances of the adapter specific column class

- Create a consistent API across adapters for building new columns
- Use it for custom properties so we don't get `UndefinedMethodError`s
  in stuff I'm implementing elsewhere.

1 files changed, 5 insertions, 1 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
index 484c44dc8d..b4d53eba26 100644
--- a/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/postgresql/schema_statements.rb
@@ -181,10 +181,14 @@ module ActiveRecord
             oid = get_oid_type(oid.to_i, fmod.to_i, column_name, type)
             default_value = extract_value_from_default(default)
             default_function = extract_default_function(default_value, default)
-            PostgreSQLColumn.new(column_name, default_value, oid, type, notnull == 'f', default_function)
+            new_column(column_name, default_value, oid, type, notnull == 'f', default_function)
           end
         end
 
+        def new_column(name, default, cast_type, sql_type = nil, null = true, default_function = nil) # :nodoc:
+          PostgreSQLColumn.new(name, default, cast_type, sql_type, null, default_function)
+        end
+
         # Returns the current database name.
         def current_database
           query('select current_database()', 'SCHEMA')[0][0]