Hi,
i've got a little problem in my app.
When I'm creating a new record in a model, i would like to update a
field in a second model with the value of one of the fields of the
first model.
Example:
# model Rent
...
t.timestamp :date
...
# model Client
...
t.timestamp :date_last_rent
...
When I create a new rent rent, I would like to save the rent.date
value into client.date_last_rent. So in RentController i do this:
def create
@rent = Rent.new(params[:rent])
respond_to do |format|
if @rent.save and Client.update_date_last_rent(@rent)
flash[:notice] = "ok"
...
else
....
flash[:error] = "ko"
end
end
In my model Client.rb I do this:
def self.update_fifo_queue(rent)
res = true
client = Client.find(line.rent_id)
client.update_attribute(:date_last_rent => rent.date)
client.save ? nil : res = false
return res
end
It works, but i'm not sure about the code in case of error..... If the
rent.save fail, the client.date_last_value is modified!!
How can i do to avoid this problem? I've read about after_save/
before_save but i never used it and i can't find examples about it!
Any suggestion is appreciated!
Matteo C.
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