Module: SimpleModel::Association::ClassMethods

Defined in:
lib/simplemodel/association.rb

Instance Method Summary collapse

Instance Method Details

#associations ⇒ Object 



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# File 'lib/simplemodel/association.rb', line 7

def associations
  @associations ||= {}
end

#many(to_model, options = {}) ⇒ Object 



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# File 'lib/simplemodel/association.rb', line 64

def many(to_model, options = {})
  to_model    = to_model.to_s
  class_name  = options[:class_name]  || to_model.classify
  name = to_model
  self.associations[to_model.to_s.to_sym] = {:class_name => class_name, :name => to_model}

  class_eval(<<-EOS, __FILE__, __LINE__ + 1)
    attr_reader :#{to_model}

    def #{to_model}
      @#{to_model} ||= TypedArray.new(#{class_name})
    end#

    def clear_#{to_model}
      @#{to_model} = nil
    end

    def #{to_model}=(array)
      @#{to_model} = TypedArray.new(#{class_name})
      array.each do |elt|
        if elt.kind_of?(Hash)
          instance = #{class_name}.new(elt)
        else
          instance = elt
        end
        self.#{to_model} << instance
      end
      return self.#{to_model}
    end

    def add_#{to_model}(*args)
      @#{to_model} = TypedArray.new(#{class_name})
      args.each do |attr|
          instance = #{class_name}.new(attr)
          self.#{to_model} << instance
      end
    end
  EOS
end

#one(to_model, options = {}) ⇒ Object 



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# File 'lib/simplemodel/association.rb', line 35

def one(to_model, options = {})
  to_model    = to_model.to_s
  class_name  = options[:class_name]  || to_model.classify
  self.associations[to_model.to_s.to_sym] = {:class_name => class_name, :name => to_model}
  class_eval(<<-EOS, __FILE__, __LINE__ + 1)
    attr_reader :#{to_model}

    def #{to_model}
      @#{to_model}
    end#

    def clear_#{to_model}
      @#{to_model} = nil
    end

    def #{to_model}=(elt)
      if elt.kind_of?(Hash)
        instance = #{class_name}.new(elt)
      elsif elt.instance_of?(#{class_name}) || elt == nil
        instance = elt
      else
        raise TypeError, "Expected Hash of attributes or #{class_name.name}"
      end
      @#{to_model} = instance
    end

  EOS
end

#singular?(str) ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/simplemodel/association.rb', line 10

def singular?(str)
  str.pluralize != str && str.singularize == str
end

#try_association(key) ⇒ Object 



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# File 'lib/simplemodel/association.rb', line 14

def try_association(key)
  modul = self.name.deconstantize.constantize
  begin
    model_klass = modul.const_get(key.singularize.classify)
    if model_klass <= SimpleModel::Base
      opt = {:class_name => model_klass}
      if singular?(key.to_s)
        self.one(key, opt)
      else
        self.many(key, opt)
      end
      return true
    else
      return false
    end
  rescue => e
    return false
  end
  return false
end