我正在尝试为我的模型创建一个验证器，但收到此错误：
validate_location(( 缺少 2 个必需的位置参数："parcare_on"和"位置">
我想根据选择的日期==parcare_on来验证该位置的停车地块是否可用。 我在这里做错了什么？
def clean_fields(self, exclude=None):
super().clean_fields(exclude=exclude)
q = Parcare.objects.all().filter(parking_on=self.parking_on)
if self.location in q:
raise ValidationError(
_('%(self.location)s is already ocuppied'),
params={'location': self.location},
)
我的模型：
from django.db import models
from django.urls import reverse
from django.db.models.signals import pre_save
from django.utils.text import slugify
from django.conf import settings
from django.utils import timezone
# from datetime import datetime
from django.contrib.auth.models import User
from django.core.exceptions import ValidationError
from django.utils.translation import gettext_lazy as _
from datetime import datetime, timedelta, time
today = datetime.now().date()
tomorrow = today + timedelta(1)
now = datetime.now()
l = now.hour
m=int(now.strftime("%H"))
class ParcareManager(models.Manager):
def active(self, *args, **kwargs):
return super(ParcareManager, self).filter(draft=False).filter(parking_on__lte=timezone.now())
class Parcare(models.Model):
PARKING_PLOT = (
('P1', 'Parking #1'), ('P2', 'Parking #2'),('P3', 'Parking #3'),
('P4', 'Parking #4'), ('P5', 'Parking #5'),('P6', 'Parking #6'),
('P7', 'Parking #7'), ('P8', 'Parking #8'),('P9', 'Parking #9'),
('P10', 'Parking #10'),('P11', 'Parking #11'),('P12', 'Parking #12'),
('P13', 'Parking #13'),('P14', 'Parking #14'),('P15', 'Parking #15'),
)
user = models.ForeignKey(settings.AUTH_USER_MODEL, blank=True,
null=True, default=1, on_delete=True)
email=models.EmailField(blank=True, null=True)
parking_on = models.DateField(auto_now=False, auto_now_add=False,
blank=True, null=True,default=tomorrow,
help_text='Alege data cand doresti sa vii in office')
parking_off = models.DateField(
auto_now=False, auto_now_add=False, blank=True, null=True, default=tomorrow,help_text='Alege Data Plecarii')
numar_masina = models.CharField(max_length=8, default="IF77WXV",
blank=True, null=True, help_text='Introdu Numarul Masinii')
location = models.CharField(max_length=3, blank=True, default="P1",
null=True, choices=PARKING_PLOT,
help_text='Alege Locul de Parcare Dorit')
updated = models.DateTimeField(auto_now=True, auto_now_add=False,blank=True, null=True)
timestamp=models.DateTimeField(auto_now=False, auto_now_add=True,blank=True, null=True)
venire = models.TimeField(default=time(9, 00), auto_now=False,
auto_now_add=False, help_text='Alege Ora Venirii')
plecare = models.TimeField(default=time(
18, 00), auto_now=False, auto_now_add=False, help_text='Alege Ora Plecarii')
booked = models.BooleanField(default=1)
objects = ParcareManager()
def __str__(self):
return self.location + " | " + str(self.parking_on) + " | " + str(self.parking_off)
class Meta:
verbose_name_plural = "parcare"
ordering = ["-parking_on"]
def clean(self):
q = Parcare.objects.filter(parking_on=self.parking_on)
if self.location in q: #nu merge sa filtram si sa vedem daca locul a fost luat deja
raise ValidationError(_('Sorry this plot is already taken!'))
if self.parking_on == today: # merge--vedem dak parcam azi si dak e tecut de ora 16
raise ValidationError({'parking_on': _('Please book for a date starting tomorrow')})
if self.parking_off < self.parking_on: #merge-vedem daca bookam in trecut
raise ValidationError({'parking_off': _('You cant book for a past date!')})
if m < 17: # se schimba semnul in > cand va fi in productie
raise ValidationError({'parking_on':_('Sorry the booking session is closed!')})
# def clean_save(safe):
# if self.parking_on != self.parking_off:
# delta=self.parking_off-self.parking_on
# print(delta)
def clean_fields(self, exclude=None):
super().clean_fields(exclude=exclude)
q = Parcare.objects.all().filter(parking_on=self.parking_on)
if self.location in q:
raise ValidationError(
_('%(self.location)s is already ocuppied'),
params={'location': self.location},
)
您的验证器函数将只接收一个参数，即它正在验证的字段，在您的情况下，只需location。相反，您应该尝试在clean_fields内部进行检查，您可以在其中访问两个字段，即parcare_on和location。如下所示。
class Parcare(models.Model):
...
def clean_fields(self, exclude=None):
super().clean_fields(exclude=exclude)
q = Parcare.objects.all().filter(parcare_on=self.parcare_on)
if self.location in q:
raise ValidationError(
_('%(self.location)s is already ocuppied'),
params={'location': self.location},
)