Has and belongs to many
If you just need to set a simple many-to-many relationship the easiest way to do this is with has_and_belongs_to_many. Here is how your models should look like.
1 2 3 4 5 6 7 | class Post < ActiveRecord::Base has_and_belongs_to_many :tags end class Tag < ActiveRecord::Base has_and_belongs_to_many :posts end |
This association is supported by an additional database table that will store post_id and tag_id for each relationship. This table should be called posts_tags and it will not be created for you, so you will have to create your own migration.
