Question

我有三种模型 StudentInfo ， StdSubject ，标记

class StdSubject(StdCommon):
    REGULAR='R'
    OPTIONAL='O'

    SUBJECT_TYPE_CHOICE=(
        (REGULAR, 'REGULAR'),
        (OPTIONAL, 'OPTIONAL')
    )


    subject_name = models.CharField('Subject Name', max_length=100)
    subject_type = models.CharField(
        'Subject Type', max_length=1, default=REGULAR, choices=SUBJECT_TYPE_CHOICE)
    subject_full_marks = models.DecimalField(
        'Full Marks', max_digits=5, decimal_places=2, default=100)
    subject_pass_marks = models.DecimalField(
        'Pass Marks', max_digits=5, decimal_places=2)


    def __str__(self):
        return self.subject_name


class StudentInfo(StdCommon):
    STD_CLASS=(
        ('6','Six'),
        ('7','Seven'),
        ('8','Eight'),
        ('9','Nine'),
        ('10','Ten'),
    )

    STD_GENDER=(
        ('MALE','Male'),
        ('FEMALE','Female'),
    )

    STD_GROUP=(
        ('S', 'Science'),
        ('B', 'Business Studies'),
        ('H', 'Humatics'),
        ('G', 'General')
    )

    std_name = models.CharField('Student Name',max_length=100, help_text='Type only student Full Name like as Nazmul Islam or Nazrul Islam')
    std_class = models.CharField('Student Class',max_length=2, choices=STD_CLASS, default=6, help_text='Select a class')
    std_roll = models.IntegerField('Roll Number',help_text='Type Student Roll Number (Only Number)')
    std_group=models.CharField('Group', choices=STD_GROUP, max_length=1, default='G')
    std_gender=models.CharField('Gender', max_length=10, choices=STD_GENDER, default='MALE')
    std_subjects = models.ManyToManyField(StdSubject)

    def __str__(self):
        return self.std_name





class Marks(StdCommon):
    std_name=models.ForeignKey(StudentInfo, on_delete=models.CASCADE)
    subject_name = models.ForeignKey(StdSubject, on_delete=models.CASCADE)
    subject_marks=models.DecimalField(max_digits=5, decimal_places=2, help_text='Please give proper number')

    subject_gradepoint=models.DecimalField('Grade Point', max_digits=3, decimal_places=1, blank=True, null=True, help_text="Please keep blank")
    subject_gpa = models.CharField('Subject GPA', max_length=5, blank=True, null=True, help_text="Please keep blank")
    std_result=models.FloatField(blank=True, null=True)



    def __str__(self):
        return self.std_name.std_name+' Class: '+str(self.std_name.std_class)+' Roll: '+str(self.std_name.std_roll) +' ' + self.subject_name.subject_name +' '+str(self.subject_marks)



    def subject_grade(self):
        grade = SubjectGrade(self.subject_marks,self.subject_name.subject_full_marks).subgrade()
        return grade

    def subject_grade_point(self):
        grade = SubjectGradePoint( self.subject_marks, self.subject_name.subject_full_marks).subgrade()
        return grade


    def save(self, *args, **kwargs):
        grade_point = SubjectGradePoint(self.subject_marks, self.subject_name.subject_full_marks).subgrade()
        gpa = SubjectGrade(self.subject_marks,self.subject_name.subject_full_marks).subgrade()

        if self.subject_name.subject_type=='O':
            if self.subject_marks >= ((self.subject_name.subject_full_marks/100)*50) and self.subject_marks <= self.subject_name.subject_full_marks:
                subject_opt_grade_point = grade_point-2

                self.subject_gradepoint = subject_opt_grade_point
                self.subject_gpa = gpa
            elif self.subject_marks >= ((self.subject_name.subject_full_marks/100)*33) and self.subject_marks < ((self.subject_name.subject_full_marks/100)*50):
                self.subject_gradepoint = 0
                self.subject_gpa=gpa

            elif self.subject_marks < ((self.subject_name.subject_full_marks/100)*33):
                self.subject_gradepoint = 0
                self.subject_gpa = gpa


        elif self.subject_name.subject_type=='R':
            self.subject_gradepoint = grade_point
            self.subject_gpa = gpa

        super().save(*args, **kwargs)

我创建了这样的表单

class StudentSubjectGPAFormAdd(forms.ModelForm):
    class Meta:
        model = Marks
        exclude = ('std_name','subject_gpa',
                   'subject_gradepoint', 'std_result')

    def __init__(self, *args, **kwargs):
        super(IncomingForm, self).__init__(*args, **kwargs)
        if self.instance:
            self.fields['subject_marks'].queryset = StudentInfo.objects.filter(
                std_name__exact=self.instance.id)

当我转到学生资料时，我想添加学生主题标记。但这行不通。但是应该遵循这个阵容

首先我输入学生资料
然后我从 StdSubject 模型
主题输入标记
然后保存

请先选择主题并输入标记，然后保存。

我想添加像这样的学生标记

Django ModelForm：如何将ForeignKey添加为表单中的字段？

0 个答案: