Python Django非空约束失败:shop\u product.user\u id
我是Django的新手,我试图通过一些项目的实践来学习,但我被这个问题困住了 非空约束失败:shop\u product.user\u id 型号.pyPython Django非空约束失败:shop\u product.user\u id,python,django,django-models,Python,Django,Django Models,我是Django的新手,我试图通过一些项目的实践来学习,但我被这个问题困住了 非空约束失败:shop\u product.user\u id 型号.py from django.db import models from django.conf import settings from django.core.urlresolvers import reverse class Category(models.Model): user = models.ForeignKey(setting
from django.db import models
from django.conf import settings
from django.core.urlresolvers import reverse
class Category(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL,
related_name='category_created')
name = models.CharField(max_length=200, db_index=True)
slug = models.SlugField(max_length=200, db_index=True, unique=True)
class Meta:
ordering = ('name',)
verbose_name = 'category'
verbose_name_plural = 'categories'
def __str__(self):
return self.name
class Product(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL,
related_name='product_created')
category = models.ForeignKey(Category, related_name='products')
name = models.CharField(max_length=200, db_index=True)
slug = models.SlugField(max_length=200, db_index=True)
image = models.ImageField(upload_to='products/%Y/%m/%d', blank=True)
description = models.TextField(blank=True)
price = models.DecimalField(max_digits=10, decimal_places=2)
stock = models.PositiveIntegerField()
available = models.BooleanField(default=True)
negiotiable = models.BooleanField(default=True)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
users_like = models.ManyToManyField(settings.AUTH_USER_MODEL,
related_name='product_liked',
blank=True)
class Meta:
ordering = ('name',)
index_together = (('id', 'slug'),)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('products_detail',
args=[self.slug])
from django.views.generic import *
from django.core.urlresolvers import reverse_lazy
from .models import Category, Product
class CategoryList(ListView):
model = Category
class CategoryDetail(DetailView):
model = Category
class ProductList(ListView):
model = Product
class ProductDetail(DetailView):
model = Product
class ProductCreate(CreateView):
model = Product
fields = ("category", 'name', 'image', 'description', 'price', 'stock','available', 'negiotiable')
class ProductUpdate(UpdateView):
model = Product
fields = ('name', 'image', 'description', 'price', 'stock','available', 'negiotiable')
class ProductDelete(DeleteView):
model = Product
success_url = reverse_lazy('product_list')
这是我的views.py,但我不确定我的视图是否有问题,我认为问题将不得不与我的模型有关
视图.py
from django.db import models
from django.conf import settings
from django.core.urlresolvers import reverse
class Category(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL,
related_name='category_created')
name = models.CharField(max_length=200, db_index=True)
slug = models.SlugField(max_length=200, db_index=True, unique=True)
class Meta:
ordering = ('name',)
verbose_name = 'category'
verbose_name_plural = 'categories'
def __str__(self):
return self.name
class Product(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL,
related_name='product_created')
category = models.ForeignKey(Category, related_name='products')
name = models.CharField(max_length=200, db_index=True)
slug = models.SlugField(max_length=200, db_index=True)
image = models.ImageField(upload_to='products/%Y/%m/%d', blank=True)
description = models.TextField(blank=True)
price = models.DecimalField(max_digits=10, decimal_places=2)
stock = models.PositiveIntegerField()
available = models.BooleanField(default=True)
negiotiable = models.BooleanField(default=True)
created = models.DateTimeField(auto_now_add=True)
updated = models.DateTimeField(auto_now=True)
users_like = models.ManyToManyField(settings.AUTH_USER_MODEL,
related_name='product_liked',
blank=True)
class Meta:
ordering = ('name',)
index_together = (('id', 'slug'),)
def __str__(self):
return self.name
def get_absolute_url(self):
return reverse('products_detail',
args=[self.slug])
from django.views.generic import *
from django.core.urlresolvers import reverse_lazy
from .models import Category, Product
class CategoryList(ListView):
model = Category
class CategoryDetail(DetailView):
model = Category
class ProductList(ListView):
model = Product
class ProductDetail(DetailView):
model = Product
class ProductCreate(CreateView):
model = Product
fields = ("category", 'name', 'image', 'description', 'price', 'stock','available', 'negiotiable')
class ProductUpdate(UpdateView):
model = Product
fields = ('name', 'image', 'description', 'price', 'stock','available', 'negiotiable')
class ProductDelete(DeleteView):
model = Product
success_url = reverse_lazy('product_list')
请告诉我可以做什么。将用户添加到列表中:
class ProductCreate(CreateView):
model = Product
fields = ["category", 'name', 'image', 'description', 'price','stock','available', 'negiotiable', 'user']
或者确保字段必须为null=true且为空=true
class Product(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL,
related_name='product_created', null=True, blank=True)
为您的产品添加一个表单
class ProductForm(forms.ModelForm):
class Meta:
model = Product
fields = "__all__"
此外,您的user
字段必须是null=True
和blank=True
然后在create视图中
class ProductCreate(CreateView):
model = Product
form_class = ProductForm
def form_valid(self, form):
form.instance.user = self.request.user
form.save()
return super(ProductCreate, self).form_valid(form)
现在,无论何时创建产品,创建产品的用户都将被添加为该产品的用户。您是否有
商店
模型?您的产品创建视图不包括用户。发生这种情况时,您是否正在尝试创建产品?您能显示URL吗?我尝试过您的解决方案,但仍然不起作用,我仍然收到相同的错误消息。无论如何,谢谢当您更改字段时,您是否再次迁移了它?它起作用了,但现在我在/product/createNoEversematch处获得了noreversematch。好的,如果这起作用,请正确标记QUESSION,对于反向匹配错误,这可能会对您有所帮助