我的forms.py中有一个验证函数，需要满足以下条件。这是我的代码。
def clean_time框架必须检查数据库中的以下内容： 1.时间表 2.学生 3.日期
所以，如果我为学生约翰·史密斯选择上午9点的时间。您不能在同一天为学生记录相同的时间范围。我如何做到这一点？谢谢
forms.py
class K8Points_ClassroomForm(forms.ModelForm):
class Meta:
model = K8Points
fields = ('student_name', 'behavior','academic', 'time_frame','date','day','week_of','class_name')
def clean_time_frame(self):
time_frame = self.cleaned_data.get('time_frame')
date = self.cleaned_data.get('date')
student_name = self.cleaned_data.get('student_name')
if (time_frame == ""):
raise forms.ValidationError('Field can not be left blank !')
for instance in K8Points.objects.all():
if instance.time_frame == time_frame:
raise forms.ValidationError('This timeframe was already logged !' + time_frame)
return time_frame
models.py
from django.db import models
from django.utils import timezone
from django.forms import ModelForm
import datetime
from datetime import date
from django.utils.translation import gettext_lazy as _
import uuid
from model_utils import Choices
# Create your models here.
class TeacherClass(models.Model):
class_name = models.CharField(max_length = 50, default= "")
class Meta:
verbose_name = "Teacher Class Room"
def __str__(self):
return self.class_name
class Teachers(models.Model):
teacherpsid = models.CharField(primary_key = True , default = "", max_length = 50, unique = True)
teacher_name = models.CharField(max_length= 50)
grade = models.CharField(max_length = 2)
class_name = models.ManyToManyField(TeacherClass)
class Meta:
verbose_name = "Teacher"
def __str__(self):
return self.teacher_name
class Student(models.Model):
studentpsid= models.CharField(primary_key = True , default = "", max_length = 50, unique = True)
student_name = models.CharField(max_length = 50)
student_grade = models.CharField(max_length = 2, default = "")
counseling_goal = models.CharField(max_length = 255)
class_name = models.ManyToManyField(TeacherClass)
def __str__(self):
return self.student_name
class NhsPoints(models.Model):
date = models.DateField(default=timezone.now)
class_name = models.ForeignKey(TeacherClass, on_delete = models.PROTECT, default = "")
week_of = models.IntegerField()
day = models.CharField(max_length= 10)
status = models.CharField(max_length= 10, default = "")
def weeknumber():
return datetime.datetime.today().isocalendar()[1]
def dayofweek():
weekday = datetime.datetime.today().weekday()
if weekday == 6:
s = 'Sunday'
return s
elif weekday ==0:
m = "Monday"
return m
elif weekday ==1:
t = "Tuesday"
return t
elif weekday ==2:
w = "Wednesday"
return w
elif weekday ==3:
th = "Thursday"
return th
elif weekday ==4:
f= "Friday"
return f
elif weekday ==5:
sa = "Saturday"
return sa
elif weekday ==6:
su= "Sunday"
return su
class K8Points(models.Model):
date = models.DateField(default=timezone.now)
class_name = models.ForeignKey(TeacherClass, on_delete = models.PROTECT, default = "")
student_name = models.ForeignKey(Student,on_delete = models.CASCADE, default ="" )
week_of = models.IntegerField(default=weeknumber)
day = models.CharField(max_length= 10, default = dayofweek)
TIME_FRAME = Choices('8:45AM - 9:00AM','9:00AM - 9:30AM','9:30AM - 10:00AM','REC. I 10:00AM -10:10AM','10:10AM-10:40AM','10:40AM-11:10AM','11:10AM-11:40AM','REC II LUNCH 11:40AM-12:20PM'
,'12:20PM-12:50PM','12:20PM-12:50PM', '12:50PM-1:20PM','1:20PM-1:50PM','1:50PM-2:20PM','REC. III 2:20PM-2:30PM')
time_frame = models.CharField(max_length = 40, choices= TIME_FRAME,default="", blank = True)
behavior = models.IntegerField(default="",null = True)
academic = models.IntegerField(default="" , null = True)
daily_total = models.IntegerField(default=0, null = True)
class Meta:
verbose_name = "K8-Points"
def __str__(self):
return self.student_name
def subtotal(self):
return self.academic + self.behavior
@Eliakin Costa解决方案后的跟踪
Environment:
Request Method: POST
Request URL: http://127.0.0.1:8000/points/k8_points_classroom
Django Version: 2.2.6
Python Version: 3.7.3
Installed Applications:
['django.contrib.admin',
'django.contrib.auth',
'django.contrib.contenttypes',
'django.contrib.sessions',
'django.contrib.messages',
'django.contrib.staticfiles',
'forms.apps.FormsConfig',
'crispy_forms',
'users.apps.UsersConfig',
'points.apps.PointsConfig']
Installed Middleware:
['django.middleware.security.SecurityMiddleware',
'django.contrib.sessions.middleware.SessionMiddleware',
'django.middleware.common.CommonMiddleware',
'django.middleware.csrf.CsrfViewMiddleware',
'django.contrib.auth.middleware.AuthenticationMiddleware',
'django.contrib.messages.middleware.MessageMiddleware',
'django.middleware.clickjacking.XFrameOptionsMiddleware']
Traceback:
File "C:\Users\rzuchowski\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\exception.py" in inner
34. response = get_response(request)
File "C:\Users\rzuchowski\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\base.py" in _get_response
115. response = self.process_exception_by_middleware(e, request)
File "C:\Users\rzuchowski\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\core\handlers\base.py" in _get_response
113. response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "C:\Users\rzuchowski\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\contrib\auth\decorators.py" in _wrapped_view
21. return view_func(request, *args, **kwargs)
File "C:\missinglink\points\views.py" in K8_Points_Classroom
31. if form.is_valid():
File "C:\Users\rzuchowski\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\forms\forms.py" in is_valid
185. return self.is_bound and not self.errors
File "C:\Users\rzuchowski\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\forms\forms.py" in errors
180. self.full_clean()
File "C:\Users\rzuchowski\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\forms\forms.py" in full_clean
381. self._clean_fields()
File "C:\Users\rzuchowski\AppData\Local\Programs\Python\Python37-32\lib\site-packages\django\forms\forms.py" in _clean_fields
402. value = getattr(self, 'clean_%s' % name)()
File "C:\missinglink\points\forms.py" in clean_time_frame
52. if models.K8Points.objects.filter(day=day, time_frame=time_frame, student_name=student_name).exists():
Exception Type: NameError at /points/k8_points_classroom
Exception Value: name 'models' is not defined
答案 0 :(得分：2)
只需更改您的清洁方法即可。
def clean(self):
cleaned_data = super(K8Points_ClassroomForm, self).clean()
date = cleaned_data.get("date")
time_frame = cleaned_data.get("time_frame")
student_name = cleaned_data.get("student_name")
if K8Points.objects.filter(date=date, time_frame=time_frame, student_name=student_name).exists():
raise forms.ValidationError(
'This timeframe {} was already logged to the student {} on {}'.format(time_frame, student_name.student_name, date)
)