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Diffstat (limited to 'guides/source/association_basics.md')
| -rw-r--r-- | guides/source/association_basics.md | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/guides/source/association_basics.md b/guides/source/association_basics.md index d215d8b30f..8b6d70f1ad 100644 --- a/guides/source/association_basics.md +++ b/guides/source/association_basics.md @@ -916,8 +916,8 @@ TIP: In any case, Rails will not create foreign key columns for you. You need to ##### `:primary_key` -By convention, Rails assumes that the `id` column is used to hold the primary key of it's table. -The `:primary_key` option allows you to specify a different column. +By convention, Rails assumes that the `id` column is used to hold the primary key +of its tables. The `:primary_key` option allows you to specify a different column. For example, given we have a `users` table with `guid` as the primary key. If we want a separate `todos` table to hold the foreign key `user_id` in the `guid` column, then we can use `primary_key` to achieve this like so: @@ -931,7 +931,8 @@ class Todo < ActiveRecord::Base end ``` -When we execute `@user.todos.create` then the `@todo` record will have `user_id` value as the `guid` value of `@user`. +When we execute `@user.todos.create` then the `@todo` record will have its +`user_id` value as the `guid` value of `@user`. ##### `:inverse_of` |