CODEWITHSUNDEEP
ruby-on-railsactiverecord
gosukiwi
gosukiwi

Reputation: 1575

ActiveRecord update association to match new list

I have a pretty common many-to-many association in my models, each story has_many tags, what I want to do is to be able to update all of the tags of the story in a simple matter. Right now I'm just deleting all relations and writing them again, basically:

def update_tags(tag_list)
  self.tags.clear
  tag_list.each { |tag| self.tags << tag }
  save
end

But I feel that it's a dirty way to do things, as there a better solution to this issue? Something like

self.tags = tag_list
save

Although that doesn't work of course :)

EDIT: So the latter works, turns out I was building a list using map, and inside the map block I used a return statement, I removed it and it (using implicit return I guess) and it now works!

Upvotes: 0

Views: 65

Answers (1)

Kirill Platonov
Kirill Platonov

Reputation: 411

Why not? http://guides.rubyonrails.org/association_basics.html#methods-added-by-has-many-collection-objects

def update_tags(tag_list)
  self.tags = tag_list
end

This must work.

Upvotes: 2

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