uninitialized constant Post::FriendlyID

Question

Update

A solution was found while writing this question. Still posting the question in case someone else has the same issue. My solution was because of a typo. See bottom of this post and the posted answer for complete code.

Original Question

Trying to implement the friendlyId gem in a RoR webapp.

I have already asked this question on the GitHub forum , but saw in the Wiki notes to post my question here. I did do a search for an answer already and tried multiple suggestions, and nothing worked. Here is what I did.

STEPS

Worked ~~> Added gem 'friendly_id', '~> 5.1.0' to my Gemfile and ran bundle install Worked ~~> ran rails g friendly_id

$ rails g friendly_id
  create  db/migrate/20180404164213_create_friendly_id_slugs.rb
  create  config/initializers/friendly_id.rb

Fixed Migration File ~~> Changed class AddSlugToPosts < ActiveRecord::Migration to class AddSlugToPosts < ActiveRecord::Migration[5.1]

Worked ~~> ran rake db:migrate

$ rake db:migrate
== 20180404164213 CreateFriendlyIdSlugs: migrating ============================
-- create_table(:friendly_id_slugs)
   -> 0.0246s
-- add_index(:friendly_id_slugs, :sluggable_id)
   -> 0.0048s
-- add_index(:friendly_id_slugs, [:slug, :sluggable_type])
   -> 0.0035s
-- add_index(:friendly_id_slugs, [:slug, :sluggable_type, :scope], {:unique=>true})
   -> 0.0031s
-- add_index(:friendly_id_slugs, :sluggable_type)
   -> 0.0029s
== 20180404164213 CreateFriendlyIdSlugs: migrated (0.0392s) ===================

Worked ~~> ran rails g migration add_slug_to_posts slug:string:uniq and then ran rake db:migrate

$ rails g migration add_slug_to_posts slug:string:uniq
      invoke  active_record
      create    db/migrate/20180404164731_add_slug_to_posts.rb
$ rake db:migrate
== 20180404164731 AddSlugToPosts: migrating ===================================
-- add_column(:posts, :slug, :string)
   -> 0.0078s
-- add_index(:posts, :slug, {:unique=>true})
   -> 0.0042s
== 20180404164731 AddSlugToPosts: migrated (0.0123s) ==========================

Updated posts_controller.rb ~~> From:

def set_post
   @post = Post.find(params[:id])
end

To:

def set_post
   @post = Post.friendly.find(params[:id])
end

Updated post.rb ~~> From:

class Post < ApplicationRecord
  belongs_to :member

  Status = ['Draft', 'Under Review', 'Edits Needed', 'Completed']

  validates_with FeaturedValidator
end

To:

class Post < ApplicationRecord
  extend FriendlyID
  friendly_id :title, use: :slugged

  belongs_to :member

  Status = ['Draft', 'Under Review', 'Edits Needed', 'Completed']

  validates_with FeaturedValidator
end

ERROR ~~> ran rails c to open the console to update previous posts to have a slug. ran Post.find_each(&:save) and got this error.

2.5.0 :001 > Post.find_each(&:save)
Traceback (most recent call last):
        3: from (irb):1
        2: from app/models/post.rb:1:in `<top (required)>'
        1: from app/models/post.rb:8:in `<class:Post>'
NameError (uninitialized constant Post::FriendlyID)

Researched and quit console and tried spring stop and the result stated that spring wasn't running. I then I tried the following and restarted the console each time before trying Post.find_each(&:save)

I tried changing extend FriendlyID to extend ::FriendlyID .

ERROR : NameError (uninitialized constant FriendlyID)

I tried adding require "friendly_id" at the beginning.

ERROR : NameError (uninitialized constant Post::FriendlyID)

And I tried both together.

ERROR : NameError (uninitialized constant FriendlyID)

I then saw somewhere that the require: "friendly_id" is supposed to be in the Gemfile and not the model. So, I deleted it there and added it to the Gemfile like so: gem 'friendly_id', '~> 5.1.0', require: "friendly_id"

ERROR : NameError (uninitialized constant Post::FriendlyID)

Any ideas would be greatly appreciated.

Solution

As I was writing this out and looking at my code, I realized that my error was due to a typo. I typed extend FriendlyID instead of extend FriendlyId . Notice the final 'd' is suppose to be lowercase, not uppercase. I will post an answer with my final code that works for anyone else that is having this issue.

Answer 1

As mentioned at the end of my question. My issue was that I had a typo when calling to extend 'FriendlyId' in my model. I capitalized the final 'd'. Here is my final code that works.

Gemfile

# Friendly URLs
gem 'friendly_id', '~> 5.1.0', require: "friendly_id"

app/models/post.rb

class Post < ApplicationRecord
  extend FriendlyId
  friendly_id :title, use: :slugged

  belongs_to :member

  Status = ['Draft', 'Under Review', 'Edits Needed', 'Completed']

  validates_with FeaturedValidator
end

app/controllers/post_controller.rb ~~ Changed def set_post to

def set_post
  @post = Post.friendly.find(params[:id])
end