35 lines
827 B
Ruby
35 lines
827 B
Ruby
require 'json'
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class JSONColumnCoder
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attr_accessor :object_class
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def initialize(object_class = Object)
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@object_class = object_class
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end
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def dump(obj)
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return if obj.nil?
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unless obj.is_a?(object_class)
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raise ActiveRecord::SerializationTypeMismatch,
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"Attribute was supposed to be a #{object_class}, but was a #{obj.class}. -- #{obj.inspect}"
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end
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JSON.dump obj
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end
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def load(json)
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return object_class.new if object_class != Object && json.nil?
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return json unless json.is_a?(String)
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obj = JSON.load(json)
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unless obj.is_a?(object_class) || obj.nil?
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raise ActiveRecord::SerializationTypeMismatch,
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"Attribute was supposed to be a #{object_class}, but was a #{obj.class}"
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end
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obj ||= object_class.new if object_class != Object
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obj
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end
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end
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