Class: SimplyCouch::Model::EmbeddedIn::Property

Inherits:
Object
  • Object
show all
Defined in:
lib/simply_couch/model/embedded_in.rb

Overview

:nodoc:

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(owner_clazz, name, options = {}) ⇒ Property

Returns a new instance of Property.



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# File 'lib/simply_couch/model/embedded_in.rb', line 52

def initialize(owner_clazz, name, options = {})
  @name = name
  embedded_in_name = name
  @options = {
    :class_name => name.to_s.singularize.camelize
  }.update(options)

  @options.assert_valid_keys(:class_name)

  # For now restrictions on naming
  parent_property_name = owner_clazz.name.property_name.pluralize

  owner_clazz.class_eval do
    property :"#{name}_id"
    attr_accessor :parent_object
    property :index
    @@embedded_in_class_name = name.to_s.camelize

    class << self

      define_method :embedded_in_class_name do
      #  embedded_in_name.to_s.singularize.camelize
        @@embedded_in_class_name
      end

      define_method :belongs_to do |belongs_to_name, *args|
        super(*([belongs_to_name] + args))
        # Now override belongs to view
        view "association_#{foreign_property}_belongs_to_#{belongs_to_name}",
          :map_function => %|function(doc){if(doc['ruby_class'] == '#{embedded_in_class_name}' && doc['#{self.name.property_name.pluralize}']){
            for(var i in doc.#{self.name.property_name.pluralize}){
              if(doc['#{self.name.property_name.pluralize}'][i]['#{belongs_to_name.to_s.foreign_key}']){
                emit([doc['#{self.name.property_name.pluralize}'][i]['#{belongs_to_name.to_s.foreign_key}'], doc['created_at']], doc['#{self.name.property_name.pluralize}'][i]);
              }
            }
          }}|,
          :reduce_function => %|function(key, values){return values.length}|,
          :type => :raw,
          :results_filter => lambda{|results| results['rows'].map{|row| d = row['value']; d.parent_object = row['doc']; d.parent_object.send(self.name.property_name.pluralize)[d.index]}},
          :include_docs => true
      end

      define_method :count do |options = {}|
        database.view(all_documents_for_count(options.merge(:reduce => true)))['rows'].try(:first).try('[]', 'value').to_i
      end
    end

    # Make parent object send through original for callbacks
    define_method :parent_object= do |value|
      return @parent_object if @parent_object && @parent_object == value
      @parent_object = value # Prevent circular calls
      send("#{name}=", value)
    end
    # Redefine the equality method, since we are different kind of objects
    define_method "==" do |value|
      self.class == value.class && (value.respond_to?(:parent_object) && self.parent_object == value.parent_object) && (value.respond_to?(:index) && self.index == value.index)
    end
    view :all_documents_for_count, :type => :raw, :include_docs => false, :map_function => %|function(doc){
      if(doc['ruby_class'] == '#{name.to_s.singularize.camelize}' && typeof(doc['#{parent_property_name}']) == 'object'){
        for(var i=0; i < doc['#{parent_property_name}'].length; i++){
          emit(doc['#{parent_property_name}'][i]['created_at'], 1);
        }
      }
    }|, :reduce_function => '_sum'
    view :all_documents, :type => :raw, :include_docs => true, :map_function => %|function(doc){
      if(doc['ruby_class'] == '#{name.to_s.singularize.camelize}' && typeof(doc['#{parent_property_name}']) == 'object'){
        for(var i=0; i < doc['#{parent_property_name}'].length; i++){
          emit(doc['#{parent_property_name}'][i]['created_at'], doc['#{parent_property_name}'][i]);
        }
      }
    }|, :results_filter => lambda{|results| results['rows'].map{|row| d = row['value']; d.parent_object = row['doc']; d.parent_object.send(parent_property_name)[d.index]}}



    # For now empty merge. Since value of map function is transformed to object
    define_method :merge do |*args|
    end

    define_method :save do |callbacks=true|
      if !parent_object
        errors.add(name, 'no_parent')
        return false
      end
      if callbacks
        _run_save_callbacks do
          parent_object.is_dirty if self.dirty?
          parent_object.save
        end
      else
        parent_object.is_dirty if self.dirty?
        parent_object.save
      end
    end

    define_method name do |*args|
      local_options = args.last.is_a?(Hash) ? args.last : {}
      local_options.assert_valid_keys(:force_reload, :with_deleted)
      forced_reload = local_options[:force_reload] || false
      with_deleted = local_options[:with_deleted] || false
      return parent_object
    end

    define_method "#{name}=" do |value|
      return value if instance_variable_get("@#{name}") == value
      klass = self.class.get_class_from_name(name)
      raise ArgumentError, "expected #{klass} got #{value.class}" unless value.nil? || value.is_a?(klass)

      if value
        # Has many object update
        value_has_many_name = klass.properties.find{|p| p.is_a?(SimplyCouch::Model::HasManyEmbedded::Property) && p.options[:class_name] == self.class.name}.try(:name)
        value.send("add_#{value_has_many_name.to_s.singularize}", self) unless !value_has_many_name || value.send(value_has_many_name).include?(self)

        # Has one object update
        #value_has_one_name = klass.properties.find{|p| p.is_a?(SimplyCouch::Model::HasOneEmbedded::Property) && p.options[:class_name] == self.class.name}.try(:name)
        #value.instance_variable_set("@#{value_has_one_name}", self) unless !value_has_one_name || value.send(value_has_one_name) == self
      end

      # Mark changed if appropriate
      send("#{name}_will_change!") if value != parent_object

      instance_variable_set('@parent_object', value)
      if value.nil?
        send("#{name}_id=", nil)
      else
        send("#{name}_id=", value.id)
      end
    end
  end
end

Instance Attribute Details

#name ⇒ Object

Returns the value of attribute name.



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# File 'lib/simply_couch/model/embedded_in.rb', line 50

def name
  @name
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/simply_couch/model/embedded_in.rb', line 50

def options
  @options
end

Instance Method Details

#association? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/simply_couch/model/embedded_in.rb', line 190

def association?
  true
end

#build(object, json) ⇒ Object 



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# File 'lib/simply_couch/model/embedded_in.rb', line 181

def build(object, json)
  object.send "#{name}_id=", json["#{name}_id"]
end

#serialize(json, object) ⇒ Object Also known as: value 



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# File 'lib/simply_couch/model/embedded_in.rb', line 185

def serialize(json, object)
  json["#{name}_id"] = object.send("#{name}_id") if object.send("#{name}_id")
end