diff options
| author | Vijay Dev <vijaydev.cse@gmail.com> | 2011-04-26 23:40:47 +0530 |
|---|---|---|
| committer | Vijay Dev <vijaydev.cse@gmail.com> | 2011-04-26 23:40:47 +0530 |
| commit | c1132f7093b29e6acb95be4d262a07d5b04082d3 (patch) | |
| tree | e4393e8de8a5030592ffd0c44149d26db11d2187 /railties/guides/source/migrations.textile | |
| parent | b105dc441b078e3b0db1affc94f970c6233ee709 (diff) | |
| download | rails-c1132f7093b29e6acb95be4d262a07d5b04082d3.tar.gz rails-c1132f7093b29e6acb95be4d262a07d5b04082d3.tar.bz2 rails-c1132f7093b29e6acb95be4d262a07d5b04082d3.zip | |
added the list of reversible commands in the newer migrations
Diffstat (limited to 'railties/guides/source/migrations.textile')
| -rw-r--r-- | railties/guides/source/migrations.textile | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/railties/guides/source/migrations.textile b/railties/guides/source/migrations.textile index 18ae8a2251..27f8a9303e 100644 --- a/railties/guides/source/migrations.textile +++ b/railties/guides/source/migrations.textile @@ -342,10 +342,14 @@ h4. Writing Your +change+ Method The +change+ method removes the need to write both +up+ and +down+ methods in those cases that Rails know how to revert the changes automatically. Currently, the +change+ method supports only these migration definitions: -* +create_table+ * +add_column+ -* +rename_column+ * +add_index+ +* +add_timestamp+ +* +create_table+ +* +remove_timestamps+ +* +rename_column+ +* +rename_index+ +* +rename_table+ If you're going to use other methods, you'll have to write the +up+ and +down+ methods normally. |