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Diffstat (limited to 'guides/source/active_record_migrations.md')
| -rw-r--r-- | guides/source/active_record_migrations.md | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/guides/source/active_record_migrations.md b/guides/source/active_record_migrations.md index 4d195988f8..905c76e5c1 100644 --- a/guides/source/active_record_migrations.md +++ b/guides/source/active_record_migrations.md @@ -126,7 +126,7 @@ generator to handle making it for you: $ rails generate migration AddPartNumberToProducts ``` -This will create an empty but appropriately named migration: +This will create an appropriately named empty migration: ```ruby class AddPartNumberToProducts < ActiveRecord::Migration[5.0] @@ -135,9 +135,14 @@ class AddPartNumberToProducts < ActiveRecord::Migration[5.0] end ``` -If the migration name is of the form "AddXXXToYYY" or "RemoveXXXFromYYY" and is -followed by a list of column names and types then a migration containing the -appropriate `add_column` and `remove_column` statements will be created. +This generator can do much more than append a timestamp to the file name. +Based on naming conventions and additional (optional) arguments it can +also start fleshing out the migration. + +If the migration name is of the form "AddColumnToTable" or +"RemoveColumnFromTable" and is followed by a list of column names and +types then a migration containing the appropriate `add_column` and +`remove_column` statements will be created. ```bash $ rails generate migration AddPartNumberToProducts part_number:string |