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💅 for migrations guide from #15457 [ci skip]

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1 parent 1cfa4cc commit 87cc918daab39174c82b0aeb617fb8e4b4f107fb @zzak zzak committed Jun 1, 2014
Showing with 8 additions and 7 deletions.
  1. +8 −7 guides/source/migrations.md
@@ -417,25 +417,26 @@ column and adds an index on it. Finally it renames the `upccode` column.
### Changing Columns
-Like the `remove_column` and `add_column` Rails provides the `change_column`.
+Like the `remove_column` and `add_column` Rails provides the `change_column`
+migration method.
```ruby
change_column :products, :part_number, :text
```
-This changes the column part_number on products table to be a text.
+This changes the column `part_number` on products table to be a `:text` field.
-Besides the `change_column`, the `change_column_null` and
-`change_column_default` are used specifically to change the null and default
-values of a column.
+Besides `change_column`, the `change_column_null` and `change_column_default`
+methods are used specifically to change the null and default values of a
+column.
```ruby
change_column_null :products, :name, false
change_column_default :products, :approved, false
```
-This sets name on products to a NOT NULL column and the default value
-of approved as false.
+This sets `:name` field on products to a `NOT NULL` column and the default
+value of the `:approved` field to false.
### When Helpers aren't Enough

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