CODEWITHSUNDEEP
ruby-on-rails
timpone
timpone

Reputation: 19979

Can I create a has_one association in a single call?

I have an Item which I split the table with cache_item. CachItem contains some serialized fragments. Like this:

class Item < ActiveRecord::Base
  has_one :cache_item
end

class CacheItem < ActiveRecord::Base
  belongs_to :item
end

how would I tell it to create one and save it automatically?

I do something like this:

if !cache_item
  CacheItem.create! item_id: id
  self.reload # seems like I shouldn't have to do this
end

but seems like there should be a single call. Is there?

For a has_many, I can do:

>item.comments.count
>1
>item.comments.create! # inserts with proper information
>2

What is the pattern for a has_one?

Upvotes: 1

Views: 1292

Answers (2)

user3834416
user3834416

Reputation: 90

For an Item that has_many Comment(s) you use:

Item.comments.create()

And for an Item that has_one Comment you use:

Item.create_comment

Upvotes: 1

messanjah
messanjah

Reputation: 9288

For a has_one association, you can use create_association! as documented: http://guides.rubyonrails.org/association_basics.html#has-one-association-reference

In your case

item.create_cached_item!

Upvotes: 2

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