Django Signals: The QuerySet value for an exact lookup must be limited to
one result using slicing
i have this code in my models.py (post_save)
class StudentsEnrolledSubject(models.Model):
Students_Enrollment_Records =
models.ForeignKey(StudentsEnrollmentRecord, related_name='+',
on_delete=models.CASCADE, null=True)
Subject_Section_Teacher = models.ForeignKey(SubjectSectionTeacher,
related_name='+', on_delete=models.CASCADE,
null=True,blank=True)
@receiver(post_save, sender=StudentsEnrollmentRecord)
def create(sender, instance, created, *args, **kwargs):
teachers =
SubjectSectionTeacher.objects.filter(Sections=instance.Section,Education_Levels=instance.Education_Levels,Courses=instance.Courses)
for each in teachers:
if created and teachers.exists():
StudentsEnrolledSubject.objects.update_or_create(
pk=each.id,
Students_Enrollment_Records=instance,
Subject_Section_Teacher=teachers.all()
)
class StudentsEnrollmentRecord(models.Model):
Student_Users = models.ForeignKey(StudentProfile,
related_name='students', on_delete=models.CASCADE, null=True)
class SubjectSectionTeacher(models.Model):
Education_Levels = models.ForeignKey(EducationLevel,
related_name='+', on_delete=models.CASCADE, blank=True)
Courses = models.ForeignKey(Course, related_name='+',
on_delete=models.CASCADE, null=True, blank=True)
Sections = models.ForeignKey(Section, related_name='+',
on_delete=models.CASCADE, null=True)
Subjects = models.ForeignKey(Subject, related_name='+',
on_delete=models.CASCADE, null=True)
Employee_Users = models.ForeignKey(EmployeeUser, related_name='+',
on_delete=models.CASCADE, null=True)
when I used the **Subject_Section_Teacher=teachers.first()** i received no
error but that is not what i want result, then i decide to change it to
this **Subject_Section_Teacher=teachers.all()**
On Tue, Nov 5, 2019 at 1:21 PM Motaz Hejaze <trapper...@gmail.com> wrote:
> If you need any help please let me know
>
> My skype
>
> m3tz-hjze
>
> On Mon, 4 Nov 2019, 4:44 pm Laura Pérez, <lpver...@gmail.com> wrote:
>
>> Thanks!
>>
>> Em seg, 4 de nov de 2019 às 09:59, Paras Jain <parasjain...@gmail.com>
>> escreveu:
>>
>>> Hi,
>>> just follow this video u will easily know how to make api very easily
>>> link - https://www.youtube.com/watch?v=263xt_4mBNc
>>> Thnks
>>>
>>> On Mon, Nov 4, 2019 at 6:17 PM Laura Pérez <lpver...@gmail.com> wrote:
>>>
>>>> Hi!
>>>> I have the task to develop a rest api in python, Can anybody advice me
>>>> on a nice tutorial to use djangorest framework ?
>>>>
>>>> Best!
>>>>
>>>>
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>>>>
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>> --
>> --
>> Laura Pérez Vera
>> (+53) 53440970 - lpver...@gmail.com
>>
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