Create a many_through_many association. Arguments:
name - Same as associate, the name of the association.
through - The tables and keys to join between the current table and the associated table. Must be an array, with elements that are either 3 element arrays, or hashes with keys :table, :left, and :right. The required entries in the array/hash are:
:table (first array element) |
The name of the table to join. |
:left (middle array element) |
The key joining the table to the previous table. Can use an array of symbols for a composite key association. |
:right (last array element) |
The key joining the table to the next table. Can use an array of symbols for a composite key association. |
If a hash is provided, the following keys are respected when using eager_graph:
:block |
A proc to use as the block argument to join. |
:conditions |
Extra conditions to add to the JOIN ON clause. Must be a hash or array of two pairs. |
:join_type |
The join type to use for the join, defaults to :left_outer. |
:only_conditions |
Conditions to use for the join instead of the ones specified by the keys. |
opts - The options for the associaion. Takes the same options as many_to_many.
# File lib/sequel/plugins/many_through_many.rb, line 160 def many_through_many(name, through, opts={}, &block) associate(:many_through_many, name, opts.merge(through.is_a?(Hash) ? through : {:through=>through}), &block) end
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