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Ruby ActiveRecord Basics Migrations and Relationships Relationships

Jack Riminton
Jack Riminton
651 Points
Posted by Jack Riminton
Jack Riminton
651 Points

Error for the singular form of "belongs_to"

It is complaining that my relationship for the Comment model is not in the singular form, however I'm pretty sure that's what I have?

class BlogPost < ActiveRecord::Base has_many :comments end

class Comment < ActiveRecord::Base belongs_to :blogpost end

models.rb 
class BlogPost < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :blogpost
end

1 Answer

Chris McKnight
Chris McKnight
11,045 Points
Chris McKnight
Chris McKnight
11,045 Points

Your belongs_to does not use the correct snake case version of BlogPost. You need to use blog_post.

Alternatively, you can specify foreign_key, and class_name on your belongs_to. Then, you have to specify inverse_of on your has_many.

class BlogPost < ActiveRecord::Base
  has_many :comments
end

class Comment < ActiveRecord::Base
  belongs_to :blog_post
end