How to parse an array to json using ruby on rails

Question

I'm trying to parse a hash to json but in the index.json.jbuilder I get empty hash.

what am I doing wrong:

  def self.fake_objects 

    fake_objects = {id: 1,
                  title: 'appointment one',
                  description: 'bla bla bla',
                  start_time: '2014-08-19 14:00:00.000000000 Z',
                  end_time: '2014-08-19 14:30:00.000000000 Z'}  
  end

events_controller

  def index
    @events = Event.all
    @fake_objects = Event.fake_objects 
  end

index.json.jbuilder

(@fake_objects).to_json do |event|
  json.extract! event, :id, :title, :description
  json.start event.start_time
  json.end event.end_time
  json.url event_url(event, format: :html)
end

class Event < ActiveRecord::Base
  def self.fake_objects 
    fake_objects = Event.new(id: 1,
                  title: 'appointment one',
                  description: 'bla bla bla',
                  start_time: '2014-08-19 14:00:00.000000000 Z',
                  end_time: '2014-08-19 14:30:00.000000000 Z')
  end 
end

@fake_objects is likely nil in your view. You don't set it in the controller. — Sergio Tulentsev
– Sergio Tulentsev, Commented Aug 25, 2014 at 12:17
@evanx You have defined fake_objects but you are using @fake_objects check once — anusha
– anusha, Commented Aug 25, 2014 at 12:24
@SergioTulentsev I just omitted the controller part, I edited the post. — evanx
– evanx, Commented Aug 25, 2014 at 12:42

Igor Guzak · Accepted Answer · 2014-08-25 12:50:44Z

-1

try something like:

json.events @fake_objects do |json, event|
  json.extract! event, :id, :title, :description
  json.start event.start_time
  json.end event.end_time
  json.url event_url(event, format: :html)
end

but @fake_objects should be defined as [], for single event you could write:

json.event do |json|
  json.extract! @fake_object, :id, :title, :description
  json.start @fake_object.start_time
  json.end @fake_object.end_time
  json.url event_url(@fake_object, format: :html)
end

If you need just array of results (without events: []) write json.array! ..

edited Aug 25, 2014 at 12:50

answered Aug 25, 2014 at 12:37

Igor Guzak

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3 Comments

evanx Over a year ago

I when I use json array like json.array!(@fake_objects) I get: undefined method `id' for [:id, 1]:Array

Igor Guzak Over a year ago

it looks like your @fake_objects is not Array, but Hash

Igor Guzak Over a year ago

If you want render single Hash item you could use second variant (even without json.event ..) but instead of @fake_object.id wirte @fake_object[:id]

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