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Diffstat (limited to 'guides/source/migrations.md')
| -rw-r--r-- | guides/source/migrations.md | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/guides/source/migrations.md b/guides/source/migrations.md index 7c6c2ee18e..9840e7694f 100644 --- a/guides/source/migrations.md +++ b/guides/source/migrations.md @@ -334,7 +334,7 @@ end removes the `description` and `name` columns, creates a `part_number` string column and adds an index on it. Finally it renames the `upccode` column. -### When Helpers Aren't Enough +### When Helpers aren't Enough If the helpers provided by Active Record aren't enough you can use the `execute` method to execute arbitrary SQL: @@ -433,7 +433,7 @@ no such migrations, it exits. It will run these migrations in order based on the date of the migration. Note that running the `db:migrate` also invokes the `db:schema:dump` task, which -will update your db/schema.rb file to match the structure of your database. +will update your `db/schema.rb` file to match the structure of your database. If you specify a target version, Active Record will run the required migrations (up, down or change) until it has reached the specified version. The version @@ -585,8 +585,8 @@ Occasionally you will make a mistake when writing a migration. If you have already run the migration then you cannot just edit the migration and run the migration again: Rails thinks it has already run the migration and so will do nothing when you run `rake db:migrate`. You must rollback the migration (for -example with `rake db:rollback`), edit your migration and then run `rake -db:migrate` to run the corrected version. +example with `rake db:rollback`), edit your migration and then run +`rake db:migrate` to run the corrected version. In general, editing existing migrations is not a good idea. You will be creating extra work for yourself and your co-workers and cause major headaches |