我想在这个项目上完成两个目标。首先，我想将登录用户保存为审阅者。其次，我想将外键中的律师值传递到审核表中。 (通过这种方式，用户可以点击律师详细信息页面上的评论链接来评论该律师，而不是其他人。)
我一直朝着第一个目标前进，但出现了这个错误。
错误
IntegrityError at /lawyers/karlyn-rosemarie-hylton/review/
NOT NULL constraint failed: lawyers_review.reviewer_id
有人可以解释一下我做错了什么以及如何解决吗？
第二个目标似乎与第一个目标非常相关。我没有收到任何错误。但我想确保我做对了。但是，在我通过第一个错误之前我无法判断。
非常感谢任何帮助摆脱困境。
模型.py
from django.db import models
from django.urls import reverse
from django.template.defaultfilters import slugify
from django.contrib.auth.models import User
class Lawyer(models.Model):
name = models.CharField(max_length=55,
default='')
picture = models.ImageField(upload_to='media/lawyers/pictures',
default='')
slug = models.SlugField()
def average_rating(self):
all_ratings = map(lambda x: x.rating, self.review_set.all())
return np.mean(all_ratings)
def save(self, *args, **kwargs):
self.slug = (slugify(self.name))
super(Lawyer, self).save(*args, **kwargs)
def get_absolute_url(self):
return reverse('lawyers:detail', kwargs={'slug': self.slug})
def __str__(self):
return self.name
class Review(models.Model):
RATING_CHOICES = (
(1, '1'),
(2, '2'),
(3, '3'),
(4, '4'),
(5, '5'),
)
lawyer = models.ForeignKey(Lawyer,
null=True)
created = models.DateTimeField(auto_now_add=True)
reviewer = models.ForeignKey(User)
title = models.CharField(max_length=55,
default='')
comment = models.TextField()
rating = models.IntegerField(choices=RATING_CHOICES)
def __str__(self):
return self.lawyer.name
View .py
from django.shortcuts import render, get_object_or_404
from django.views.generic import (CreateView,
DetailView,
ListView)
from django.contrib.auth.models import User
from .models import Lawyer, Review
class AddLawyerView(CreateView):
model = Lawyer
fields = ['name', 'picture']
def post_valid(self, form):
lawyer = form.save(Commit=False)
lawyer.picture = form.cleaned_data['picture']
return super(AddLawyerView, self).form_valid(form)
class LawyerDetail(DetailView):
model = Lawyer
class LawyerList(ListView):
model = Lawyer
class AddReviewView(CreateView):
model = Review
fields = ['rating', 'title', 'comment']
def post_valid(self, form):
review = form.save(Commit=False)
review.lawyer = get_object_or_404(Lawyer,
slug=self.kwargs.get('slug'))
review.reviewer = User.objects.get(user=self.request.user)
return super(AddReview, self).form_valid(form)
网址.py
from django.conf.urls import url
from .views import (AddLawyerView,
LawyerDetail,
LawyerList,
AddReviewView)
urlpatterns = [
url(r'^add-lawyer',
AddLawyerView.as_view(),
name = 'add-lawyer'),
url(r'^(?P<slug>[\w-]+)/$',
LawyerDetail.as_view(),
name = 'detail'),
url(r'^$',
LawyerList.as_view(),
name = 'list'),
url(r'^(?P<slug>[\w-]+)/review/$',
AddReviewView.as_view(),
name = 'add-review'),
]
根据@Alasdair 和@Sachin Kukreja 的反馈，我回去做了一些更正。我将“提交”更改为“提交”，将“post_valid”更改为“form_valid”。我还做了一个小调整来简化 View 。更正且有效的 AddReviewView 如下所示。有错误的在上面。
谢谢大家!
工作 View :
class AddReviewView(CreateView):
model = Review
fields = ['rating', 'title', 'comment']
def form_valid(self, form):
review = form.save(commit=False)
review.lawyer = get_object_or_404(Lawyer,
slug=self.kwargs.get('slug'))
review.reviewer = self.request.user
return super(AddReviewView, self).form_valid(form)
请您参考如下方法:
你有一个错字，你覆盖了 form_valid 但你写了 post_valid。
def form_valid(self, form):
review = form.save(Commit=False)
review.lawyer = get_object_or_404(Lawyer,
slug=self.kwargs.get('slug'))
review.reviewer = User.objects.get(user=self.request.user)
# save and return HttpResponse
review.save()
return HttpResponseRedirect(self.get_success_url())
但是，super 调用仍会调用父类的 form_valid，这仍会引发错误。我认为您可以在这个覆盖方法中保存评论并返回基类返回的内容，即 return HttpResponseRedirect(self.get_success_url())
引用:form_valid in FormMixin class , form_valid in ModelFormMixin class
