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-rw-r--r--guides/source/active_record_migrations.md35
1 files changed, 21 insertions, 14 deletions
diff --git a/guides/source/active_record_migrations.md b/guides/source/active_record_migrations.md
index 67cd86c19b..c5ac70143d 100644
--- a/guides/source/active_record_migrations.md
+++ b/guides/source/active_record_migrations.md
@@ -522,20 +522,27 @@ majority of cases, where Active Record knows how to reverse the migration
automatically. Currently, the `change` method supports only these migration
definitions:
-* `add_column`
-* `add_index`
-* `add_reference`
-* `add_timestamps`
-* `add_foreign_key`
-* `create_table`
-* `create_join_table`
-* `drop_table` (must supply a block)
-* `drop_join_table` (must supply a block)
-* `remove_timestamps`
-* `rename_column`
-* `rename_index`
-* `remove_reference`
-* `rename_table`
+* add_column
+* add_foreign_key
+* add_index
+* add_reference
+* add_timestamps
+* change_column_default (must supply a :from and :to option)
+* change_column_null
+* create_join_table
+* create_table
+* disable_extension
+* drop_join_table
+* drop_table (must supply a block)
+* enable_extension
+* remove_column (must supply a type)
+* remove_foreign_key (must supply a second table)
+* remove_index
+* remove_reference
+* remove_timestamps
+* rename_column
+* rename_index
+* rename_table
`change_table` is also reversible, as long as the block does not call `change`,
`change_default` or `remove`.