Django 模型表单不保存数据

Question

我想用django创建一个todolist应用程序。我为列表模型创建了一个表单，但当用户点击提交提交列表时，表单没有保存，为什么？

这是views.py我已经创建了一个表单的实例，并将用户字段设置为它，然后保存该实例，但事实上它没有

def index(request):
if request.user.is_authenticated:
user_ = User.objects.get(username=request.user.username)
lists = user_.user.all()
form = listForm()
if request.method == "POST":
form = listForm(request.POST)
if form.is_valid():
instance = form.save(commit=False)
instance.user = request.user
instance.save()
return HttpResponseRedirect(reverse("index"))
context = {'lists':lists, 'form':form}   
return render(request, 'todolists/index.html', context)
else:
return render(request, 'todolists/login.html')   

这是索引模板

{% extends "todolists/layout.html" %}
{% block body %}
{% if user.is_authenticated %}
<div class="center-column">
<form method="POST" action="{% url 'index' %}"> 
{% csrf_token %}
{{form.title}}
<input type="submit" class="btn btn-info">
</form>
<div class="todo-list">
{% for list in lists %}
<div class="item-row">
<a class="btn btn-sm btn-info" href="{% url 'update' list.id %}">update</a>
<a class="btn btn-sm btn-danger" href="{% url 'update' list.id %}">delete</a>
<span>{{list}}</span>
</div>
{% endfor %}
</div>
</div>
{% endif %} 
{% endblock %}

这是urls.py

from django.urls import path
from .import views
urlpatterns = [
path('', views.index, name='index'),
path('update/<str:id>/', views.update, name='update'),
path("login", views.login_view, name="login"),
path("logout", views.logout_view, name="logout"),
path("register", views.register, name="register"),
]

这是型号.py

from django.db import models
from django.contrib.auth.models import AbstractUser
# Create your models here.
class User(AbstractUser):
pass

class list(models.Model):
title = models.CharField(max_length=200)
finished = models.BooleanField(default=False)
timestamps = models.DateTimeField(auto_now_add=True)
user = models.ForeignKey(User, on_delete=models.CASCADE, related_name="user")

def __str__(self):
return self.title

这是的表单代码

class listForm(forms.ModelForm):
title= forms.CharField(label=mark_safe("<span style='color:white;'>Title:</span>"),
widget= forms.TextInput(attrs={'placeholder':'Add new task...', 'class':'form-control'}))
finished= forms.BooleanField(label=mark_safe("<span style='color:white;'>Finished:</span>"),
widget= forms.CheckboxInput(attrs={'style':'width:25px;'}))
class Meta:
model = list
fields = '__all__'

Answer 1

如django文档中所述，尝试将模板文件{{ form.title }}更新为{{ form }}

如果只需要HTML 中的title字段，请更新forms.py文件

class listForm(forms.ModelForm):
title= forms.CharField(label=mark_safe("<span style='color:white;'>Title:</span>"),
widget= forms.TextInput(attrs={'placeholder':'Add new task...', 'class':'form-control'}))

class Meta:
model = list
fields = ('title', )