CODEWITHSUNDEEP
ruby-on-railsmongoid
Mike
Mike

Reputation: 89

Error when accessing constructor in embedded mongoid model class

I have an emmbedded mongoid class "Option" which I would like to initialize the following way:

@option = @event.options.new('yes')

class Option

  include Mongoid::Document

  field :content, type: String

  embedded_in :event

  def initialize(content)
    @content = content
  end
end

So I added the consctructor above but I get the following error:

NoMethodError in EventsController#new undefined method `[]' for nil:NilClass

What am I missing?

Using rails 4...

EDIT: As requested here is the controller code:

class EventsController < ApplicationController
      before_action :set_event, only: [:show, :edit, :update, :destroy]

      # GET /events
      # GET /events.json
      def index
        @events = Event.all
      end

      # GET /events/1
      # GET /events/1.json
      def show
      end

      # GET /events/new
      def new
        @event = Event.new

        @event.invitees << @event.invitees.build
        @event.options  << @event.options.build
        #end
      end

      # GET /events/1/edit
      def edit
      end

      # POST /events
      # POST /events.json
      def create

        # TODO: adapt event_params and filter right
        #@event = Event.create(event_params)
        @event = Event.new(params[:event])

        respond_to do |format|
          if @event.save
            #TODO: Save users attached to event in user collection
            format.html { redirect_to @event, notice: 'Event was successfully created.' }
            format.json { render action: 'show', status: :created, location: @event }
          else
            format.html { render action: 'new' }
            format.json { render json: @event.errors, status: :unprocessable_entity }
          end
        end
      end

      # PATCH/PUT /events/1
      # PATCH/PUT /events/1.json
      def update
        respond_to do |format|
          if @event.update(event_params)
            format.html { redirect_to @event, notice: 'Event was successfully updated.' }
            format.json { head :no_content }
          else
            format.html { render action: 'edit' }
            format.json { render json: @event.errors, status: :unprocessable_entity }
          end
        end
      end

      # DELETE /events/1
      # DELETE /events/1.json
      def destroy
        @event.destroy
        respond_to do |format|
          format.html { redirect_to events_url }
          format.json { head :no_content }
        end
      end

      private
        # Use callbacks to share common setup or constraints between actions.
        def set_event
          @event = Event.find(params[:id])
        end

        # Never trust parameters from the scary internet, only allow the white list through.
        def event_params
          params.require(:event).permit(:name, :description, :date)
        end
    end

Upvotes: 0

Views: 112

Answers (1)

Zennichimaro
Zennichimaro

Reputation: 5306

That is because your field :content, type: String is not initialized yet

You'll need to call super() in the first line of your initialize method, then you'll be able to change the value of content in the constructor

Try:

def initialize(content)
   super()
   self.content = content
end

Upvotes: 1

Related Questions