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Versions: 26
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Contents
module AnafHabtm
module ActiveRecord
def anaf_habtm(association, options={}, &block)
class_eval do
# Define a proc that will look up the (potentially) existing object
finder = proc {|id| association.to_s.singularize.camelize.constantize.where(:id=>id).first
}
# Define a proc that will set the association collection
set_collection = proc {|me, coll| me.send("#{association.to_s.tableize}=", coll)}
has_and_belongs_to_many association.to_sym, options
# Define the actual association setter.
define_method "#{association.to_s.tableize}_attributes=", lambda{|attributes_for_association|
coll = []
attributes_for_association.each_value do |params|
next if params["_destroy"] == "1"
obj = finder.call(params["id"]) if params.has_key?("id")
params.extend(AnafHabtm::HashExtension)
# ActiveRecord::Base.attributes=() doesn't like extra parameters.
coll << block.call(params.copy_without_destroy, obj)
end
set_collection.call(self, coll)
}
end
end
def named_association(member, attribute, opts={})
member = member.to_s
klass = opts.has_key?(:class) ? opts[:class_name] : member.to_s.singularize.camelize
attribute = attribute.to_s
if opts.has_key?(:create)
class_eval "def #{member}_#{attribute}=(#{attribute});
return if #{attribute}.blank?
self.#{member} = #{klass}.find_or_create_by_#{attribute}(#{attribute})
end;"
else
class_eval "def #{member}_#{attribute}=(#{attribute}); self.#{member} = #{klass}.find_by_#{attribute}(#{attribute}) unless #{attribute}.blank?; end;"
end
class_eval "def #{member}_#{attribute}; #{member}.#{attribute} if #{member}; end;"
end
end
end
Version data entries
26 entries across 26 versions & 1 rubygems