CODEWITHSUNDEEP
ruby-on-rails
SnareChops
SnareChops

Reputation: 13347

Rails 4 - Custom create method, assign association manually after looking up object by name

I am trying to modify the create method of my controller to custom build this object.

The scenario is a modal window displays a form which has an autocomplete text field that loads in platform names via AJAX, then the user submits the form, the create method looks up the Platform by the name in the text box, and adds it to the current_user.game collection...

I have a simple has_many relationship from Game to Platform

1    def create
2        platform = Platform.where(:short_name => params[:platform])
3     
4        game = Game.new(game_params)
5        game.platform << platform
6        current_user.games << game
7        render :nothing
8    end

I am getting an error undefined method '<<' for nil:NilClass on line 5.

I don't know if this is how this should be done... How should I try to accomplish this?

Upvotes: 0

Views: 1321

Answers (2)

SnareChops
SnareChops

Reputation: 13347

So I had the association wrong in my models (forgot to add it) and also I had a platform column of type string in my Game table instead of a platform_id column of type `integer.

After updating that I began getting the an ActiveRecordTypeMismatch error which it was expecting the type Platform but found ActiveRecord::Record::Association (or something like that).

Also apparently when assigning to the belongs_to side of an association use = instead of <<.

Below is the updated working controller create method

game = Game.new(game_params)
game.platform = Platform.where(:short_name => params[:platform]).first
current_user.game << game
render :nothing

Upvotes: 0

tihom
tihom

Reputation: 8003

You are missing a s?

game.platforms << platform
#------------^-------------

Upvotes: 1

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