Question

我只希望管理员插入“课程”（ABM）和“教育水平”（11年级）和“科目”（编年史），它将在subjectsectionteacher（第二张图片）中获取所有相关数据，并将其自动保存到学生注册的学科（第三张图片）我的问题是只有一个数据保存。

这是我在models.py中的代码

class StudentsEnrollmentRecord(models.Model):
    Student_Users = models.ForeignKey(StudentProfile, related_name='students', on_delete=models.CASCADE, null=True)
    School_Year = models.ForeignKey(SchoolYear, related_name='+', on_delete=models.CASCADE, null=True, blank=True)
    Courses = models.ForeignKey(Course, related_name='+', on_delete=models.CASCADE, null=True, blank=True)
    Section = models.ForeignKey(Section, related_name='+', on_delete=models.CASCADE, null=True, blank=True)
    Payment_Type = models.ForeignKey(PaymentType, related_name='+', on_delete=models.CASCADE, null=True)
    Education_Levels = models.ForeignKey(EducationLevel, related_name='+', on_delete=models.CASCADE, blank=True,null=True)

class SubjectSectionTeacher(models.Model):
    School_Year = models.ForeignKey(SchoolYear, related_name='+', on_delete=models.CASCADE, null=True)
    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)

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, **kwargs):
        teachers = SubjectSectionTeacher.objects.all().filter(Sections=instance.Section,Education_Levels=instance.Education_Levels)
        if created and teachers.exists():
            StudentsEnrolledSubject.objects.update_or_create(
                # This should be the instance not instance.Student_Users
                Students_Enrollment_Records=instance,
                # The below is also not an instance of SubjectSectionTeacher
                Subject_Section_Teacher=teachers.first())

我希望标题和图片足以理解我想说的话，对不起！

更新这就是我想要的

admin.py

class StudentsEnrollmentRecordAdmin(admin.ModelAdmin):
    #inlines = [InLineSubject]
    list_display = ('lrn', 'Student_Users', 'Education_Levels', 'Courses', 'Section', 'Payment_Type' ,'School_Year')
    #list_select_related = ('Student_Users')
    ordering = ('Education_Levels','Student_Users__lrn')
    list_filter = ('Student_Users','Education_Levels','Section','Payment_Type')

@admin.register(StudentsEnrolledSubject)
class StudentsEnrolledSubject(admin.ModelAdmin):
    list_display = ('Students_Enrollment_Records','Subject_Section_Teacher',)
    ordering = ('Students_Enrollment_Records',)

@admin.register(SubjectSectionTeacher)
class SubjectSectionTeacher(admin.ModelAdmin):
    list_display = ('School_Year','Education_Levels','Courses','Sections','Subjects','Employee_Users','Education_Levels','Status')
    ordering = ('School_Year',)

def lrn(self, obj):
    return  obj.Student_Users.lrn

如何使用Django信号post_save获取所有相关数据并将其保存到另一个表

0 个答案: