Guys new plugin again
Foreign Key Associations is a plugin that automatically creates associations based on foreign-keys. The associations are created at runtime-ie. as your ActiveRecord models are loaded-so they will always be up-to-date.
For example, given a foreign-key from a customer_id column in an orders table to an id column in a customers table, the plugin creates:
Order.belongs_to :customerCustomer.has_many :orders If there is a uniqueness constraint-eg unique index-on a foreign-key column, then the plugin will creates a has_one instead of a has_many.
For example, given a foreign-key from an order_id column with a uniqueness constraint in an invoices table to an id column in an orders table, the plugin creates:
Invoice.belongs_to :orderOrder.has_one :invoice Additionally, if there is a position column in the child table, the parent association will be created with an order clause.
For example, given a foreign-key from a order_id column in an order_lines table containing a position column, to an id column in a orders table, the plugin creates:
OrderLine.belongs_to :ordersOrder.has_many :lines, :order => :position The plugin also supports the creation of has_and_belongs_to_many associations.
For example, given the tables product_product_categories with foreign- keys to both the product and product_categories tables, the plugin creates:
Product.has_and_belongs_to_many :categoriesProductCategory.has_and_belongs_to_many :products And finally, notice that in one of the previous examples, the association name used for the Order.has_many is :lines and not :order_lines. More specifically, the plugin removes the prefix from has_many and has_one associations if the the name of parent class forms a proper prefix of the child class name.
The plugin fully supports and understands the following active-record configuration properties:
config.active_record.pluralize_table_names config.active_record.table_name_prefix config.active_record.table_name_suffix
Installation EDGE To install using SVN: ruby script/plugin install svn://rubyforge.org/var/svn/redhillonrails/trunk/vendor/plugins/foreign_key_associations
or using HTTP: ruby script/plugin install http://www.redhillonrails.org/svn/trunk/vendor/plugins/foreign_key_