Rails - Feb 2010 - update user input to another table without using html form

Hey all,

Let''s say you are not going to use an html form. Rather the user will
input data in a third-party application that will communicate with the
rails controller through http requests, but serves as a replacement to
the html. In other words, it''s taking the place of front end.

My question is can you update the attributes of another table, let''s
say
studentfails table, from let''s say a students controller (which has a
students table) based on user input (the user input needs to be inserted
in the studentfails table).

I was hoping something like this, but this doesn''t work:

student.rb
has_one :student_fail
attr_accessor :student_fail_attribute


def find_failing_student
@student = @student.find params[:id]
end
def update_failing_student
  @student = @student.find params[:id]
  @student.build_student_fail params[:student][:student_fail_attribute]
end

Even for this you have to put student_fail_attribute in the html. I''m
hoping there''s a way where you don''t have to put anything in
the html.
Any suggestions? Thanks for any response.
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> @student = @student.find params[:id]
This makes no sense to me...
> Even for this you have to put student_fail_attribute in the html.
I''m
> hoping there''s a way where you don''t have to put anything
in the html
Are you trying to say that you want to use a get request instead of a 
post request? In a perfect world every request that changes the server 
state is a post request, but if you want to use a get request just put 
additional parameters in the url.

I suggest you make this work with a regular html view before worrying 
about the external front end.
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Sharagoz -- wrote:
>> @student = @student.find params[:id]
> This makes no sense to me...
> 
>> Even for this you have to put student_fail_attribute in the html.
I''m
>> hoping there''s a way where you don''t have to put
anything in the html
> Are you trying to say that you want to use a get request instead of a 
> post request? In a perfect world every request that changes the server 
> state is a post request, but if you want to use a get request just put 
> additional parameters in the url.
What do you mean by put additional parameters in the url? Thanks for the 
response though.

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On Feb 19, 8:16 pm, John Merlino
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:
> Hey all,
>
> Let''s say you are not going to use an html form. Rather the user
will
> input data in a third-party application that will communicate with the
> rails controller through http requests, but serves as a replacement to
> the html. In other words, it''s taking the place of front end.
>
> My question is can you update the attributes of another table,
let''s say
> studentfails table, from let''s say a students controller (which
has a
> students table) based on user input (the user input needs to be inserted
> in the studentfails table).
>
> I was hoping something like this, but this doesn''t work:
>
> student.rb
> has_one :student_fail
> attr_accessor :student_fail_attribute
>
> def find_failing_student
> @student = @student.find params[:id]
> end
> def update_failing_student
>   @student = @student.find params[:id]
>   @student.build_student_fail params[:student][:student_fail_attribute]
> end
You don''t appear to be *saving* the result from
@student.build_student_fail. Either you''re looking for
create_student_fail (which saves the record) or something like:

def update_failing_student
  @student = Student.find(params[:id])
  @student_fail = @student.build_student_fail(params[:student]
[:student_fail_attribute])
  if @student_fail.save
    # save succeeded
  else
    # save failed - re-render form with errors
  end
end
> Even for this you have to put student_fail_attribute in the html.
I''m
> hoping there''s a way where you don''t have to put anything
in the html.
Not sure what you''re looking for here: it''s going to be hard
to get a
field from the user without asking for it...

--Matt Jones

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