71 lines
1.4 KiB
Ruby
71 lines
1.4 KiB
Ruby
module Polyamorous
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class Join
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include TreeNode
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attr_accessor :name
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attr_reader :type, :klass
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def initialize(name, type = InnerJoin, klass = nil)
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@name = name
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@type = convert_to_arel_join_type(type)
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@klass = convert_to_class(klass) if klass
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end
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def klass=(klass)
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@klass = convert_to_class(klass) if klass
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end
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def type=(type)
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@type = convert_to_arel_join_type(type) if type
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end
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def hash
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[@name, @type, @klass].hash
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end
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def eql?(other)
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self.class == other.class &&
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self.name == other.name &&
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self.type == other.type &&
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self.klass == other.klass
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end
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alias :== :eql?
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def add_to_tree(hash)
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hash[self] ||= {}
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end
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private
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def convert_to_arel_join_type(type)
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case type
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when 'inner', :inner
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InnerJoin
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when 'outer', :outer
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OuterJoin
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when Class
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if [InnerJoin, OuterJoin].include? type
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type
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else
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raise ArgumentError, "#{type} cannot be converted to an ARel join type"
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end
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else
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raise ArgumentError, "#{type} cannot be converted to an ARel join type"
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end
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end
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def convert_to_class(value)
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case value
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when String, Symbol
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Kernel.const_get(value)
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when Class
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value
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else
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raise ArgumentError, "#{value} cannot be converted to a Class"
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end
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end
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end
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end
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