Class: Mongoid::Alize::ToCallback

Inherits:
Callback
  • Object
show all
Defined in:
lib/mongoid/alize/to_callback.rb

Instance Attribute Summary

Attributes inherited from Callback

#debug, #denorm_attrs, #inverse_klass, #inverse_metadata, #inverse_relation, #klass, #metadata, #relation

Instance Method Summary collapse

Methods inherited from Callback

#alias_callback, #aliased_callback_name, #callback_attached?, #callback_defined?, #callback_name, #define_denorm_attrs, #denorm_attrs_name, #field_values, #fields_to_s, #force_check, #force_param, #initialize, #to_s

Constructor Details

This class inherits a constructor from Mongoid::Alize::Callback

Instance Method Details

#alias_destroy_callback ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 145

def alias_destroy_callback
  unless callback_defined?(aliased_destroy_callback_name)
    klass.send(:alias_method, aliased_destroy_callback_name, destroy_callback_name)
    klass.send(:public, aliased_destroy_callback_name)
  end
end

#aliased_destroy_callback_name ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 152

def aliased_destroy_callback_name
  :"denormalize_destroy_#{direction}_#{relation}"
end

#attach ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 7

def attach
  define_denorm_attrs

  define_callback
  alias_callback
  set_callback

  define_destroy_callback
  alias_destroy_callback
  set_destroy_callback
end

#define_callback ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 19

def define_callback
  klass.class_eval <<-CALLBACK, __FILE__, __LINE__ + 1

    def #{callback_name}#{force_param}

      #{iterable_relation}.each do |relation|
        next if relation.attributes.frozen?

        is_one = #{is_one?}
        if is_one
          field_values = #{field_values("self")}
        else
          field_values = #{field_values("self", :id => true)}
        end

        prefixed_name = #{prefixed_name}
        if is_one
          #{relation_set('prefixed_name', 'field_values')}
        else
          #{pull_from_inverse}
          #{relation_push('prefixed_name', 'field_values')}
        end

      end

      #{debug ? "puts \"#{callback_name}\"": ""}
      true
    end
    protected :#{callback_name}
  CALLBACK
end

#define_destroy_callback ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 51

def define_destroy_callback
  klass.class_eval <<-CALLBACK, __FILE__, __LINE__ + 1

    def #{destroy_callback_name}
      #{iterable_relation}.each do |relation|
        next if relation.attributes.frozen?

        is_one = #{is_one?}
        prefixed_name = #{prefixed_name}
        if is_one
          #{relation_unset('prefixed_name')}
        else
          #{pull_from_inverse}
        end
      end

      #{debug ? "puts \"#{destroy_callback_name}\"": ""}
      true
    end
    protected :#{destroy_callback_name}
  CALLBACK
end

#destroy_callback_name ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 156

def destroy_callback_name
  :"_#{aliased_destroy_callback_name}"
end

#direction ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 160

def direction
  "to"
end

#find_relation ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 125

def find_relation
  "relation.class.relations.values.find { |metadata| metadata.inverse(self) == :#{relation} && metadata.class_name == self.class.name }"
end

#is_one? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/mongoid/alize/to_callback.rb', line 111

def is_one?
  if inverse_relation
    if self.inverse_metadata.relation.superclass == Mongoid::Relations::One
      "true"
    else
      "false"
    end
  else
    <<-RUBIES
      (#{find_relation}.relation.superclass == Mongoid::Relations::One)
    RUBIES
  end
end

#iterable_relation ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 129

def iterable_relation
  "[self.#{relation}].flatten.compact"
end

#prefixed_name ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 85

def prefixed_name
  if inverse_relation
    ":#{inverse_relation}_fields"
  else
    <<-RUBIES
      (#{find_relation}.name.to_s + '_fields')
    RUBIES
  end
end

#pull_from_inverse ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 74

def pull_from_inverse
  <<-RUBIES
    #{relation_pull('prefixed_name', '{ "_id" => self.id }')}
    if _f = relation.send(prefixed_name)
      _f.reject! do |hash|
        hash["_id"] == self.id
      end
    end
  RUBIES
end

#relation_pull(field, value) ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 103

def relation_pull(field, value)
  Mongoid::Compatibility::Version.mongoid4_or_newer? ? "relation.pull(#{field}.to_sym => #{value})" : "relation.pull(#{field}, #{value})"
end

#relation_push(field, value) ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 107

def relation_push(field, value)
  Mongoid::Compatibility::Version.mongoid4_or_newer? ? "relation.push(#{field}.to_sym => #{value})" : "relation.push(#{field}, #{value})"
end

#relation_set(field, value) ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 95

def relation_set(field, value)
  Mongoid::Compatibility::Version.mongoid4_or_newer? ? "relation.set(#{field}.to_sym => #{value})" : "relation.set(#{field}, #{value})"
end

#relation_unset(field) ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 99

def relation_unset(field)
  "relation.unset(#{field}.to_sym)"
end

#set_callback ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 133

def set_callback
  unless callback_attached?("save", aliased_callback_name)
    klass.set_callback(:save, :after, aliased_callback_name)
  end
end

#set_destroy_callback ⇒ Object 



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# File 'lib/mongoid/alize/to_callback.rb', line 139

def set_destroy_callback
  unless callback_attached?("destroy", aliased_destroy_callback_name)
    klass.set_callback(:destroy, :after, aliased_destroy_callback_name)
  end
end