75 lines
2.3 KiB
Ruby
75 lines
2.3 KiB
Ruby
require "mongoid/enum/version"
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require "mongoid/enum/validators/multiple_validator"
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require "mongoid/enum/configuration"
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module Mongoid
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module Enum
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extend ActiveSupport::Concern
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module ClassMethods
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def enum(name, values, options = {})
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field_name = :"#{Mongoid::Enum.configuration.field_name_prefix}#{name}"
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options = default_options(values).merge(options)
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set_values_constant name, values
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create_field field_name, options
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alias_attribute name, field_name
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create_validations field_name, values, options
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define_value_scopes_and_accessors field_name, values, options
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end
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private
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def default_options(values)
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{
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:multiple => false,
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:default => values.first,
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:required => true,
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:validate => true
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}
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end
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def set_values_constant(name, values)
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const_name = name.to_s.upcase
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const_set const_name, values
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end
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def create_field(field_name, options)
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type = options[:multiple] && Array || Symbol
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field field_name, :type => type, :default => options[:default]
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end
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def create_validations(field_name, values, options)
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if options[:multiple] && options[:validate]
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validates field_name, :'mongoid/enum/validators/multiple' => { :in => values, :allow_nil => !options[:required] }
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elsif validate
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validates field_name, :inclusion => {:in => values}, :allow_nil => !options[:required]
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end
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end
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def define_value_scopes_and_accessors(field_name, values, options)
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values.each do |value|
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scope value, ->{ where(field_name => value) }
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if options[:multiple]
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define_array_accessor(field_name, value)
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else
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define_string_accessor(field_name, value)
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end
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end
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end
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def define_array_accessor(field_name, value)
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class_eval "def #{value}?() self.#{field_name}.include?(:#{value}) end"
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class_eval "def #{value}!() update_attributes! :#{field_name} => (self.#{field_name} || []) + [:#{value}] end"
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end
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def define_string_accessor(field_name, value)
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class_eval "def #{value}?() self.#{field_name} == :#{value} end"
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class_eval "def #{value}!() update_attributes! :#{field_name} => :#{value} end"
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end
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end
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end
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end
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