CODEWITHSUNDEEP
ruby-on-railsactiverecord
lulalala
lulalala

Reputation: 17981

Replacing existing record with a newly created but unsaved record

If I have record A which has been saved in the database, then I want to replace it with a newly created record B which has not been saved. So B can then be saved in the database but with the id of from A (and A is replaced). Is this possible in Rails Active Record?

P.S. the reason behind this is that I need to merge objects by some condition, and constructing an object requires some internet fetching/parsing. So if time is used to parse B I want to prevent parsing it again for A, but replacing it with B.

Upvotes: 1

Views: 1384

Answers (2)

Mischa
Mischa

Reputation: 43298

You can do something like this:

a = A.find(1)
b = B.new

# Modify b

a.update_attributes(b.attributes.delete_if{ |k,v| %w(id created_at updated_at).include?(k) })

Upvotes: 2

Mikhail Nikalyukin
Mikhail Nikalyukin

Reputation: 11967

Try something like this(didn't test this code):

a = Model.find(params[:id])
b = Model.new(params)
a.update_attributes(b.attributes)

Upvotes: 2

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