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Ruby Building Social Features in Ruby on Rails Adding State What is a State Machine?

Posted by Dan H
Dan H
372 Points

NameError Uninitialized Constant in UserFriendship Model Test

Hi, I am running Rails 4 and getting a frustrating NameError when I run the test on the UserFriendship model. In my app, this is called the ActivityParticipant model, but it works the same way.

Here is the model:

class ActivityParticipant < ActiveRecord::Base
    belongs_to :activity
    belongs_to :participant, class_name: 'User', foreign_key: 'participant_id'

    attr_accessible :activity, :participant

    state_machine :state, initial: :pending do
    end
end

This is the test:

require 'test_helper'

class ActivityParticipantTest < ActiveSupport::TestCase
  should belong_to(:activity)
  should belong_to(:participant)

  test "that creating a participant works" do
    ActivityPartcipant.new participant: users(:jim), activity: activities(:one)
    assert activities(:one).participants.include?(users(:jim))
  end
end

And here is the output from running the test:

1) Error: ActivityParticipantTest#test_that_creating_a_participant_works: NameError: uninitialized constant ActivityParticipantTest::ActivityPartcipant test/models/activity_participant_test.rb:8:in `block in <class:ActivityParticipantTest>'

Any ideas?? Thank you

2 Answers

Kevin McGladdery
Kevin McGladdery
Courses Plus Student 1,894 Points

You made a typo in the class name in line 8 of your test.

Whenever I get an uninitialized constant that I think should exist, 9 times out of 10 I typed it wrong.

Dan H
Dan H
372 Points

Thank you so much Kevin! I must have looked for a typo ten times without seeing it.

Michelle Cannito
Michelle Cannito
8,992 Points
Michelle Cannito
Michelle Cannito
8,992 Points

It's kind of funny that the missing letter was an "i". You can come up with some lame pun humor:

"I" have been looking and looking, but my "eye" did not see the missing "i", but Kevin's eagle "eye" found that "i" was gone.

Oh my, is part of becoming a coder thinking like this and thinking it's funny when it really isn't? Is this a Sheldon (nerd) symptom?