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alborz
Full Stack JavaScript Techdegree Graduate 30,885 PointsGetting an undefined method error when using Rails console
Hi - I'm making a Reddit clone app via https://www.youtube.com/watch?v=7-1HCWbu7iU&t=1078 (around the 29:05 mark in the video) and when I type @link.user = User.first I get the following error:
User Load (33.9ms) SELECT "users".* FROM "users" ORDER BY "users"."id" ASC LIMIT 1 NoMethodError: undefined method `user=' for nil:NilClass
How can I solve this? Thanks!
2 Answers
Maciej Czuchnowski
36,441 PointsAlright, this means your @link is nil - it was not found or created properly. Make sure that @link contains a proper Link class object.
Maciej Czuchnowski
36,441 PointsLooks like you're missing something like "belongs_to :user" in your link model. That basically gives you a user getter and user= setter. I assume you also have a user_id field in your links schema.
alborz
Full Stack JavaScript Techdegree Graduate 30,885 PointsI do; I added a user_id field to the links table via migration. I also have a model association between the link and the user models as you mentioned.
alborz
Full Stack JavaScript Techdegree Graduate 30,885 Pointsalborz
Full Stack JavaScript Techdegree Graduate 30,885 PointsIn my Links controller I have for the def new method: @link = current_user.links.build; and for the def create method: @link = current_user.links.build(link_params) followed by what was generated by the scaffold. I'm wondering what I'm missing?
Maciej Czuchnowski
36,441 PointsMaciej Czuchnowski
36,441 PointsBut in your console you first have to instantiate this @link element - Rails doesn't know what you mean just by typing @link. It's just an empty (nil) variable. You'd have to do something like "@link = Link.new" and then do the .user stuff with it.
alborz
Full Stack JavaScript Techdegree Graduate 30,885 Pointsalborz
Full Stack JavaScript Techdegree Graduate 30,885 PointsGot it - thanks!