how to return the attributes of a model saved without ID

Question

I have a saved model and want to use the attributes of this model to fill a new one.

b = Model.new model.attributes

WARNING: Can't mass-assign protected attributes for Model: id, created_at, updated_at

I do not want to give warning to attribute id

score 1 · Answer 1 · edited May 23 '17 at 11:49

1

Why not duplicate the record? This will give you a new Id but wont keep associations. Refer to this answer.

new_record = old_record.dup

GL & HF.

edited May 23 '17 at 11:49

Community

answered Feb 10 '14 at 18:33

rlecaro2

What does "GL & HF" mean? – nickcoxdotme Feb 10 '14 at 18:45
@nickcoxdotme Good Luck and Have Fun. Common in the gaming scene. – rlecaro2 Feb 10 '14 at 19:43

score 0 · Accepted Answer · answered Feb 10 '14 at 18:28

0

If you use create! instead of new, it will instantiate an object and save it without the callbacks.

attrs = Model.last.attributes
new_model = Model.create!(attrs)

answered Feb 10 '14 at 18:28

nickcoxdotme

score 0 · Answer 3 · answered Feb 10 '14 at 18:31

If you want to get rid of the warning use except on the attributes hash to get rid of the unwanted attributes:

b = Model.new model.attributes.except(:id, :created_at, :updated_at)

That should remove those attributes from the hash before passing them into Model.new

score 0 · Answer 4 · answered Feb 10 '14 at 18:48

To copy an ActiveRecord object you should use dup (http://api.rubyonrails.org/classes/ActiveRecord/Core.html#method-i-dup). This will copy your source object except the id and created_at, updated_at type attributes to a new record which you can save when you want to.

4 Answers4