Your controller defines student_details inside the else:. If the form is
not accepted or the if is true, the else clause is never executed
and student_details never defined.
On Saturday, 2 November 2013 21:32:00 UTC-5, Rupesh Pradhan wrote:
>
> The table definition:
>
> db.define_table('student',
> Field('admission_number', 'integer', notnull=True, unique=True),
> Field('name', 'string', length=255, notnull=True))
>
> db.define_table('school_session',
> Field('school_session', 'reference session_master'),
> Field('admission_number', 'integer', notnull=True),
> Field('class_name', 'reference class_master'),
> Field('roll_number', 'integer', notnull=True))
>
>
>
> The controller
>
> def add_student_to_session():
> form = FORM(INPUT(_name='admission_number', requires=IS_NOT_EMPTY()),INPUT
> (_type='submit'))
> if form.accepts(request.vars, session):
> admission_number = form.vars.admission_number
> row = db.student(db.student.admission_number==admission_number)
> if not row:
> session.flash ='Admission number does not exist. Please check
> and retry.'
> redirect(URL(r=request, f='add_student_to_session'))
> else:
> db.school_session.admission_number.writable = False
> db.school_session.admission_number.default = admission_number
> form = crud.create(db.school_session)
> student = db.student(row.id)
> student_details = crud.update(db.student, student, readonly=
> True)
>
> return locals()The first form takes the input 'admission_number' and
> checks the student database to see if that record exist.
> If it does, it creates two forms 'form' and 'student_details'.
> 'student_details' is read only to show the user that the details being
> entered in the second form is indeed for the required student, to avoid
> problems that may arise due to the fact that the admission_number may exist
> in the database but the user entered the wrong one.
>
> In the view 'add_student_to_session.html', the following code is there
> {{extend 'layout.html'}}
> {{=form}}
> {{=BEAUTIFY(response._vars)}}
> it works file and the 'student_details' variable form show up due to the
> BEAUTIFY keyword.
>
> However, when I modify the code to
> {{extend 'layout.html'}}
> {{=student_details}}
> {{=form}}
> {{=BEAUTIFY(response._vars)}}
>
> I get an error report saying that 'student_details not defined'. How can
> that happen when it shows up when BEAUTIFY keyword displays the content of
> the 'student_details' variable just fine?
>
>
>
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