Module: ActiveRecord::JsonAssociations

Defined in:
lib/active_record/json_associations.rb,
lib/active_record/json_associations/version.rb

Constant Summary collapse

VERSION = 
"1.0.0"

Instance Method Summary collapse

Instance Method Details

#belongs_to_many(many, class_name: nil, touch: nil) ⇒ Object 



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# File 'lib/active_record/json_associations.rb', line 46

def belongs_to_many(many, class_name: nil, touch: nil)
  one = many.to_s.singularize
  one_ids = :"#{one}_ids"
  one_ids_equals = :"#{one_ids}="
  many_equals = :"#{many}="
  many_eh = :"#{many}?"

  class_name ||= one.classify

  unless columns_hash[one_ids.to_s].type == :json
    raise ArgumentError, "#{one_ids} column must be of type :json"
  end

  if touch
    after_commit do
      unless no_touching?
        old_ids, new_ids = saved_changes[one_ids.to_s]
        ids = Array(send(one_ids)) | Array(old_ids) | Array(new_ids)
        class_name.constantize.where(self.class.primary_key => ids).touch_all
      end
    end
  end

  extend Module.new {
    define_method :"#{one_ids}_including" do |id|
      raise "can't query for a record that does not have an id!" if id.blank?
      if id.is_a?(Hash)
        Array(id[:any]).inject(none) do |context, id|
          context.or(FIELD_INCLUDE_SCOPE_BUILDER_PROC.call(self, one_ids, id))
        end
      else
        FIELD_INCLUDE_SCOPE_BUILDER_PROC.call(self, one_ids, id)
      end
    end
  }

  include Module.new {
    define_method one_ids do
      super().tap do |value|
        return send(one_ids_equals, []) if value.nil?
      end
    end

    define_method one_ids_equals do |ids|
      super Array(ids).select(&:present?).map(&:to_i).uniq
    end

    define_method many do
      klass = class_name.constantize
      ids = send(one_ids).map(&:to_i)
      scope = klass.where(klass.primary_key => ids)
      ORDER_BY_IDS_PROC.call(scope, ids)
    end

    define_method many_equals do |collection|
      send one_ids_equals, collection.map(&:id)
    end

    define_method many_eh do
      send(one_ids).any?
    end
  }
end

#has_many(many, scope = nil, **options, &extension) ⇒ Object 



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# File 'lib/active_record/json_associations.rb', line 110

def has_many many, scope = nil, **options, &extension
  unless (scope.is_a?(Hash) && scope[:json_foreign_key]) || (options.is_a?(Hash) && options[:json_foreign_key])
    return super
  end

  if scope.is_a?(Hash)
    options = scope
    scope   = nil
  end

  one = many.to_s.singularize
  one_ids = :"#{one}_ids"
  one_ids_equals = :"#{one_ids}="
  many_equals = :"#{many}="
  many_eh = :"#{many}?"
  build_one = :"build_#{one}"
  create_one = :"create_#{one}"
  create_one_bang = :"create_#{one}!"

  class_name = options[:class_name] || one.classify

  foreign_key = options[:json_foreign_key]
  foreign_key = :"#{model_name.singular}_ids" if foreign_key == true

  pending_associations_var = :"@pending_#{many}"

  after_create do
    if (pending = instance_variable_get(pending_associations_var))
      instance_variable_set(pending_associations_var, nil)
      send(many_equals, pending)
    end
  end

  include Module.new {
    define_method one_ids do
      send(many).pluck(:id)
    end

    define_method one_ids_equals do |ids|
      klass = class_name.constantize
      normalized_ids = Array(ids).select(&:present?).map(&:to_i).uniq
      send many_equals, klass.find(normalized_ids)
    end

    define_method many do
      klass = class_name.constantize
      FIELD_INCLUDE_SCOPE_BUILDER_PROC.call(klass, foreign_key, id)
    end

    define_method many_equals do |collection|
      if new_record?
        instance_variable_set(pending_associations_var, collection)
      else
        collection.each do |record|
          new_id_array = Array(record.send(foreign_key)) | [id]
          record.update foreign_key => new_id_array
        end
      end
    end

    define_method many_eh do
      send(many).any?
    end

    define_method build_one do |attributes={}|
      klass = class_name.constantize
      klass.new attributes.merge!(foreign_key => [id])
    end

    define_method create_one do |attributes={}|
      klass = class_name.constantize
      klass.create attributes.merge!(foreign_key => [id])
    end

    define_method create_one_bang do |attributes={}|
      klass = class_name.constantize
      klass.create! attributes.merge!(foreign_key => [id])
    end
  }
end