Initialize `column.table_name` immediately for `column.serial?` correctly working

Currently the results of `column.serial?` is not correct. For
`column.serial?` correctly working, initialize `column.table_name`
immediately.

1 files changed, 5 insertions, 2 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
index c65d33ccb3..cf2ad934a0 100644
--- a/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/sqlite3_adapter.rb
@@ -337,7 +337,8 @@ module ActiveRecord
       end
 
       # Returns an array of +Column+ objects for the table specified by +table_name+.
-      def columns(table_name) #:nodoc:
+      def columns(table_name) # :nodoc:
+        table_name = table_name.to_s
         table_structure(table_name).map do |field|
           case field["dflt_value"]
           when /^null$/i
@@ -351,7 +352,9 @@ module ActiveRecord
           collation = field['collation']
           sql_type = field['type']
           type_metadata = fetch_type_metadata(sql_type)
-          new_column(field['name'], field['dflt_value'], type_metadata, field['notnull'].to_i == 0, nil, collation)
+          new_column(field['name'], field['dflt_value'], type_metadata, field['notnull'].to_i == 0, nil, collation).tap do |column|
+            column.instance_variable_set(:@table_name, table_name)
+          end
         end
       end