On Apr 26, 5:09 am, Colin Law <clan...@googlemail.com> wrote:
> On 26 April 2011 09:59, amrit pal pathak <amritpalpath...@gmail.com> wrote:
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> > On Apr 26, 4:44 am, Colin Law <clan...@googlemail.com> wrote:
> >> On 26 April 2011 09:41, amrit pal pathak <amritpalpath...@gmail.com> wrote:
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> >> > On Apr 26, 4:30 am, amrit pal pathak <amritpalpath...@gmail.com>
> >> > wrote:
> >> >> Afer removing that block(from index.html.erb) ,i can see localhost:
> >> >> 3000/book ,but when i click on "New book" link it gave follwoing error
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> >> >> NoMethodError in Book#new
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> >> >> Showing /home/amrit/boook/app/views/book/_form.html.erb where line #1
> >> >> raised:
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> >> >> undefined method `model_name' for NilClass:Class
> >> > Should creation of model by "rails generate model book"
> >> > will resolve this error??
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> >> You already have a Book model so no point generating it again.
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> > Yes you are right
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> >> You have had this error before, please read the error carefully. It
> >> says that something is nil that should not be.
> > Nil means it says db has nothing to show or else??
>
> Nothing to do with the database directly, it is saying a variable that
> you are using is nil. Look at where you setup the variable that is
> nil to find out why.
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> >> Earlier I suggested using ruby-debug to break into your code to see
> >> what is going on. What do you see if you break in at this point in
> >> the code?
> > I used the rails console it says
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> > amrit@ubuntu:~/boook$ rails console
> > Loading development environment (Rails 3.0.7)
> > irb(main):001:0> Book.all
> > => []
>
> That is saying that there are no books in the database, but that is
> not necessarily anything to do with your problem. As I said earlier
> look at where you are setting up the variable that is nil.
is it saying @book variablei is nil?
it is defined in controller as :
class BookController < ApplicationController
def index
@book =Book.new
end
end
One thing more,in
new.html.erb,i have written "render 'form' ",but there is no such file
(view).The file there is _form.html.erb.Is it correct?
Amrit pal
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