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django表单中的空字段验证

ivbtar • 4 年前 • 188 次点击  

我正在尝试筛选空字段并在forms.py中验证它,但出现以下错误:

不能指定“teacherAttentication.teacher”不允许空值。

但我正在为教师领域做以下表格的验证。它应该生成“请选择教师”验证警告。但这不是真的。 它应该为teacher验证空值,如果我没有从teacher字段中选择teacher,则返回到表单并显示验证警告。

class TeacherAttendanceForm(forms.ModelForm):

class Meta:
    model = TeacherAttendance
    fields = ('time', 'attendance', 'teacher','dailynote','writer',)
    exclude = ['uuid', 'notedate',]
    widgets = {
        'attendance': forms.RadioSelect(renderer=HorizontalRadioRenderer),
        'dailynote': forms.Textarea(attrs={'rows': 10}),
        'writer': forms.Textarea(attrs={'rows': 1}),
        'uuid': forms.HiddenInput(),
        'semester': forms.HiddenInput(),
    }

def clean(self):
    if str(self.cleaned_data['time']) == "-----------":
        raise forms.ValidationError('Please choose time.')
    if self.cleaned_data['dailynote'] == "":
        raise forms.ValidationError('Please enter note.')
    if not self.cleaned_data['teacher']:
        raise forms.ValidationError('Please choose teacher .')

我的模型在下面,教师字段是一个显示所有教师的下拉字段。

class TeacherAttendance(BaseModel):
teacher = models.ForeignKey(Staff, blank=True, verbose_name=_("Choose Teacher"))
attendance = models.CharField(choices=TEACHER_ATTENDANCE, default="YOK", max_length=20, verbose_name=_("Attendance"))
time = models.CharField(choices=TIME, default="-------------", max_length=20, verbose_name=_("Time"))
dailynote = models.TextField(null=True, blank=True, verbose_name=_("Add Note"))
notedate = models.DateField(auto_now_add=True, db_index=True, verbose_name=_("Date"))
writer = models.TextField(null=True, blank=True, verbose_name=_("Writer"))

class Meta:
    unique_together = ("teacher", "attendance", "notedate")
    index_together = [["teacher", "notedate", ], ]

def __unicode__(self):
    return "%s / %s / %d " % (self.teacher, self.notedate, self.attendance)  
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188 次点击  
文章 [ 1 ]  |  最新文章 4 年前
ivbtar
Reply   •   1 楼
ivbtar    5 年前

我通过在模型中更改下面的字段来解决问题:

teacher=models.foreignkey(staff,blank=true,verbose\u name=”choose teacher“)

到:

teacher=models.foreignkey(staff,blank=true,null=true,verbose\u name=”choose teacher“)

通过在字段中添加“null=true”。可能它是在进行表单验证之前首先查看模型字段的。