Number of cards <%= f.text_field :number_of_cards, :size => 10
%>
<%= submit_tag ‘Generate’ %>
<% end -%>
In the controller I have:
def generate
params[:number_of_cards].to_i.times do
pin = rand(999999999999).to_s.center(12, rand(9).to_s)
serial = rand(999999999999).to_s.center(12, rand(9).to_s)
Card.create({:pin => pin, :serial => serial})
end
end
Everything looks OK, but when I put a number and submit the form I got
nothing! No error messages and no records are saved to the database !!!
When I for example put :
3.times do
… etc
3 new records are successfully created in the database !
what’s the problem? Maybe params[:number_of_cards] doesn’t get the value
from the form? Why? And if so why don’t I get error about some nil
value?
3 new records are successfully created in the database !
what’s the problem? Maybe params[:number_of_cards] doesn’t get the
value from the form? Why? And if so why don’t I get error about some
nil value?
Because the parameter is being submitted as params[:card]
[:number_of_cards] (that’s what form_for does). You can see this in
your logs. You get no error because nil.to_i is 0
value from the form? Why? And if so why don’t I get error about some
nil value?
Your help is really appreciated.
Regards
You have form_for :card and then f.text_field :number_of_cards, so
you’ll get a params[:card][:number_of_cards]
Your params[:number_of_cards] is therefore almost certainly nil and
nil.to_i == 0
It can help tremendously to put:
<%= debug(params) %>
Into the view that comes back so you can see what really happens (or
just go look in the log/development.log where you should also see the
params hash).
