CODEWITHSUNDEEP
ruby-on-railsdatabaseactiverecordrakeseeding
Adam Bronfin
Adam Bronfin

Reputation: 1279

Rails rake db:seed not creating objects that belong_to another object?

In my seeds file I have a bunch of objects which belong_to and object which belongs_to a user.

So I have User which has a Library which has_many books

In my seeds file I set up some books like:

book = Book.new
book.attribute = "attribute"
book.save

library = Library.new
library.books << book
library.save

user = User.new
user.library = library
user.save

What happens is that a User is created which has the Library as expected, yet no books are created.

When I run rails c and do

Book.all

I see that there are 0 books.

Why is this happening?

Additionally, I create a pool of books and 5 users, and for each user I assign some of the same books created above to that users library.

However, neither

User.find(1).library.books

return anything or

Book.all

return anything.

EDIT: Fixed a typo of = Library instead of = library

EDIT: Posting models;

User:

class User < ActiveRecord::Base

  before_create :create_library, only: [:new, :create]

  # Include default devise modules. Others available are:
  # :confirmable, :lockable, :timeoutable and :omniauthable
  devise :database_authenticatable, :registerable,
         :recoverable, :rememberable, :trackable, :validatable

  after_create :send_welcome_email

  has_one :library, dependent: :destroy
end

Library:

class Library < ActiveRecord::Base
  belongs_to :user
  has_many :books, dependent: :destroy

end

Book:

class Book < ActiveRecord::Base
  validates :title, :author, presence: true
  belongs_to :library
  has_many   :sources
  has_one    :cover, class_name: 'BookCover', dependent: :destroy
  mount_uploader :cover, BookCoverUploader

  accepts_nested_attributes_for :sources, allow_destroy: true
  accepts_nested_attributes_for :cover, allow_destroy: true
end

note, to supplement creating a respective bookcover for the book model, I simply pass a value for "remote_cover_url" on the Book model which carrierwave uses to create a BookCover on the Book.

Upvotes: 1

Views: 1685

Answers (1)

sheepdog
sheepdog

Reputation: 625

As @newmediafreak mentioned, you may have validations on the Book class that prevent it from being saved.

I recommend creating your has_many and has_one instances through the associations:

user = User.create! library = user.library.create! book = user.books.create!(attribute: 'my attribute')

Using the Object.create! syntax will cause errors if there are any problems saving. Object.save fails silently.

EDIT 10:48 PDT

You have a typo/error: user.library = Library should be user.library = library, but I still recommend creating library and the books through the association.

Upvotes: 1

Related Questions