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module AuthHelpers
module Model
# Checks for a column that ends with _id in the included model. Then it adds
# a belongs_to association, accepts_nested_attributes_for and make the nested
# attributes accessible.
#
# Also includes a hook called remove_association_error, that removes the nested
# attribute errors from the parent object.
#
# Finally, if the *_id in the table has also *_type. It considers a polymorphic
# association.
#
# Whenever using this method with polymorphic association, don't forget to
# set the validation scope in AuthLogic.
#
# a.validations_scope = :accountable_type
#
module Associatable
def self.included(base)
column = base.columns.detect{|c| c.name =~ /_id$/ }
raise ScriptError, "Could not find a column that ends with id in #{base.name.tableize}" unless column
association = column.name.gsub(/_id$/, '').to_sym
polymorphic = !!base.columns.detect{ |c| c.name == "#{association}_type" }
base.class_eval do
belongs_to association, :validate => true, :dependent => :destroy,
:autosave => true, :polymorphic => polymorphic
accepts_nested_attributes_for association
attr_accessible :"#{association}_attributes"
after_validation :remove_association_error
end
base.class_eval <<-ASSOCIATION
# Remove association errors from the message
#
def remove_association_error
self.errors.each do |key, value|
next unless key.to_s =~ /^#{association}_/
self.errors.instance_variable_get('@errors').delete(key)
end
end
protected :remove_association_error
ASSOCIATION
end
end
end
end
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5 entries across 5 versions & 1 rubygems