Rails accepts_nested_attributes_for creating only

Question

I have a Post model. I would like to let users create post comments while creating/updating a post by accepts_nested_attributes_for :comments. However, I don't want to let users update comments by nested attributes.

Is there a way to do something like accepts_nested_attributes_for :comments, create_only: true?

Pretty interesting question.

Pavan
– Pavan

2014-07-28 14:32:28 +00:00
Commented Jul 28, 2014 at 14:32 — Pavan
– Pavan, Commented Jul 28, 2014 at 14:32

afilipko · Accepted Answer · 2014-07-28 14:36:38Z

3

Try to use something like this accepts_nested_attributes_for :comments, reject: :persisted? This will check, if Post object persisted or not. You also can replace persisted? with your custom method

answered Jul 28, 2014 at 14:36

afilipko

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3 Comments

Trantor Liu Over a year ago

Sorry, but I think you misread my question. I didn't mean to reject nested attributes for comments when the post is persisted. What I meant is only accepting nested attributes for creating comments.

afilipko Over a year ago

Sorry,it was my mistake. But I think you can use method for reject_if which will check if comments_attributes have :id params or not.

Trantor Liu Over a year ago

Yeah, that what I was doing.

Stephen Rauch · Accepted Answer · 2018-10-16 01:23:08Z

0

You can reject_if the id attribute is present:

accepts_nested_attributes_for :comments, reject_if: proc { |attributes| attributes['id'].present? }

edited Oct 16, 2018 at 1:23

Stephen Rauch♦

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answered Oct 16, 2018 at 1:01

Mohamed Hamed

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