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module RailsAdmin
module Adapters
module Mongoid
class Association
attr_reader :association, :model
def initialize(association, model)
@association = association
@model = model
end
def name
association.name.to_sym
end
def pretty_name
name.to_s.tr('_', ' ').capitalize
end
def type
case macro.to_sym
when :belongs_to, :referenced_in, :embedded_in
:belongs_to
when :has_one, :references_one, :embeds_one
:has_one
when :has_many, :references_many, :embeds_many
:has_many
when :has_and_belongs_to_many, :references_and_referenced_in_many
:has_and_belongs_to_many
else
fail("Unknown association type: #{macro.inspect}")
end
end
def klass
if polymorphic? && [:referenced_in, :belongs_to].include?(macro)
polymorphic_parents(:mongoid, model.name, name) || []
else
association.klass
end
end
def primary_key
:_id
end
def foreign_key
return unless [:embeds_one, :embeds_many].exclude?(macro.to_sym)
association.foreign_key.to_sym rescue nil
end
def foreign_key_nullable?
return if foreign_key.nil?
true
end
def foreign_type
return unless polymorphic? && [:referenced_in, :belongs_to].include?(macro)
association.inverse_type.try(:to_sym) || :"#{name}_type"
end
def foreign_inverse_of
return unless polymorphic? && [:referenced_in, :belongs_to].include?(macro)
inverse_of_field.try(:to_sym)
end
def as
association.as.try :to_sym
end
def polymorphic?
association.polymorphic? && [:referenced_in, :belongs_to].include?(macro)
end
def inverse_of
association.inverse_of.try :to_sym
end
def read_only?
false
end
def nested_options
nested = nested_attributes_options.try { |o| o[name] }
if !nested && [:embeds_one, :embeds_many].include?(macro.to_sym) && !association.cyclic
fail <<-MSG.gsub(/^\s+/, '')
Embbeded association without accepts_nested_attributes_for can't be handled by RailsAdmin,
because embedded model doesn't have top-level access.
Please add `accepts_nested_attributes_for :#{association.name}' line to `#{model}' model.
MSG
end
nested
end
def association?
true
end
private
def inverse_of_field
association.respond_to?(:inverse_of_field) && association.inverse_of_field
end
delegate :macro, :options, to: :association, prefix: false
delegate :nested_attributes_options, to: :model, prefix: false
delegate :polymorphic_parents, to: RailsAdmin::AbstractModel
end
end
end
end
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