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Tessa Davis
4,152 PointsJoin tables confusion (Testing Friendships)
I'm getting rather confused about foreign keys in the join table. I'm trying to follow the tutorial to build a slightly different join table to Jason's - mine links my user and guideline models to form a FavoriteGuideline table (i.e. user can pick a favorite guideline).
My error is:
'Expected FavoriteGuideline to have a belongs_to association called favorite (FavoriteGuideline does not have a favorite_id foreign key)'
My favorite_guideline.rb is
class FavoriteGuideline < ActiveRecord::Base
belongs_to :user
belongs_to :guideline
belongs_to :favorite, class_name: 'User', foreign_key: 'favorite_id'
attr_accessible :user, :favorite, :guideline
end
and my favorite_guideline_test.rb is
require 'test_helper'
class FavoriteGuidelineTest < ActiveSupport::TestCase
should belong_to(:user)
should belong_to(:favorite)
test "that creating a favorite works without raising an exception" do
assert_nothing_raised do
FavoriteGuideline.create user: users(:eve), guideline: guidelines(:three)
end
end
end
And my database migration is
class CreateFavoriteGuidelines < ActiveRecord::Migration
def change
create_table :favorite_guidelines do |t|
t.integer :user_id
t.integer :favorite_id
t.integer :guideline_id
t.timestamps
end
add_index :favorite_guidelines, [:user_id]
add_index :favorite_guidelines, [:favorite_id]
add_index :favorite_guidelines, [:guideline_id]
end
end
1 Answer
Tessa Davis
4,152 PointsI solved it by changing
class FavoriteGuidelineTest < ActiveSupport::TestCase should belong_to(:user) should belong_to(:favorite)
to
class FavoriteGuidelineTest < ActiveSupport::TestCase should belong_to(:user) should belong_to(:guideline)
Still haven't got to the end though so not sure if my association will work out!