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add `(association)`_type to schema convetions in AR basics guide.

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1 parent d131c9a commit 7c69945c765e7704edc01b3910df28a4792da859 @senny senny committed Apr 3, 2013
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  1. +2 −0 guides/source/
2 guides/source/
@@ -117,6 +117,8 @@ to Active Record instances:
a model.
* `type` - Specifies that the model uses [Single Table
+* `(association_name)_type` - Stores the type for
+ [polymorphic associations](association_basics.html#polymorphic-associations).
* `(table_name)_count` - Used to cache the number of belonging objects on
associations. For example, a `comments_count` column in a `Post` class that
has many instances of `Comment` will cache the number of existent comments

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