CODEWITHSUNDEEP
ruby-on-rails
bevanb
bevanb

Reputation: 8511

Rails nested form: only save child if a name is provided

My form lets you create a "child" on the same form as the parent, by entering that kid's name.

I only want to save the child record if a name was provided. In other words, I don't want to save a child with a blank name. I only want to create the child object if a name was provided.

What's a good way to do that?

Upvotes: 0

Views: 61

Answers (1)

Nimir
Nimir

Reputation: 5839

According to docs:

:reject_if

Allows you to specify a Proc or a Symbol pointing to a method that checks whether a record should be built for a certain attribute hash. The hash is passed to the supplied Proc or the method and it should return either true or false. When no :reject_if is specified, a record will be built for all attribute hashes that do not have a _destroy value that evaluates to true. Passing :all_blank instead of a Proc will create a proc that will reject a record where all the attributes are blank excluding any value for _destroy.

So, we need to:

class Parent < ActiveRecord::Base

  has_many :kids

  accepts_nested_attributes_for :kids, :reject_if => proc { |attributes| attributes[:name].blank? }

end

Upvotes: 1

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