relation_list.rb revision 0b611cf877554b1aa910fa23099220f2d1d15e89
#
# Helper-Class for rendering a list of relations
#
class RelationList
attr_reader :model, :collection_path, :collection, :scope, :association
#
# first argument: restful path to the collection of related objects
# second argument: options hash that may contain the following elements:
#
# :scope => scope for the autocompleter
# :model => class that represents the relation
# :association => name of the activerecord-association
# :collection => collection of all permissions
def initialize(collection_path, options)
@collection_path = collection_path
@editable = true
options.each do |key,value|
case key
when :model, :collection, :association
instance_variable_set("@#{key}", value)
when :scope
value = [value] unless value.is_a?(Array)
value.each do |v|
raise "Scope '#{v}' is not a class" unless v.is_a?(Class)
end
@scope = value.map(&:to_s).join(",")
else
raise ArgumentError, "invalid option: #{key}"
end
end
# check required attributes
for key in %w( model scope collection )
raise ArgumentError, "#{key} is not set" unless instance_variable_get("@#{key}")
end
end
def polymorphic?
@model.reflect_on_association(@association).options[:polymorphic]==true
end
# path for rendering a PermissionsList instance
def to_partial_path
'relation_list/relation_list'
end
def form_path
partial_path :form
end
def relation_partial_path
partial_path model_underscore
end
# path to a specific partial of the permission list
def partial_path(name)
"#{model_underscore.pluralize}/#{name}"
end
def model_underscore
@model.name.underscore
end
def t(key)
I18n.t(key, :scope => "relation_list.#{model_underscore}" )
end
def to_data
{
'data-model' => model,
'data-scope' => scope,
'data-polymorphic' => polymorphic? && 'true',
'data-association' => association
}
end
end