Class: ActiveRecord::Coders::JSONColumn

Inherits:
Object
  • Object
show all
Defined in:
lib/serialize-rails/coders/json_column.rb

Overview

:nodoc:

Constant Summary collapse

RESCUE_ERRORS = 
[ ArgumentError, JSON::JSONError ]

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(object_class = Object) ⇒ JSONColumn

Returns a new instance of JSONColumn.



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# File 'lib/serialize-rails/coders/json_column.rb', line 10

def initialize(object_class = Object)
  @object_class = object_class
end

Instance Attribute Details

#object_class ⇒ Object

Returns the value of attribute object_class.



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# File 'lib/serialize-rails/coders/json_column.rb', line 8

def object_class
  @object_class
end

Instance Method Details

#dump(obj) ⇒ Object 



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# File 'lib/serialize-rails/coders/json_column.rb', line 14

def dump(obj)
  return if obj.nil?

  unless obj.is_a?(object_class)
    raise SerializationTypeMismatch,
      "Attribute was supposed to be a #{object_class}, but was a #{obj.class}. -- #{obj.inspect}"
  end
  JSON.dump obj
end

#load(json) ⇒ Object 



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# File 'lib/serialize-rails/coders/json_column.rb', line 24

def load(json)
  return object_class.new if object_class != Object && json.nil?
  return json unless json.is_a?(String)
  begin
    obj = JSON.load(json)

    unless obj.is_a?(object_class) || obj.nil?
      raise SerializationTypeMismatch,
        "Attribute was supposed to be a #{object_class}, but was a #{obj.class}"
    end
    obj ||= object_class.new if object_class != Object

    obj
  rescue *RESCUE_ERRORS
    json
  end
end