Django表单不工作(按钮什么都不做)

Question

我是Django的新手，在创建了两个表单(TopicForm和EntryForm(后，只有第二个表单不起作用。当我单击"添加条目"按钮时，不会发生任何事情。我看不出问题到底在哪里，这很奇怪，因为我在第一节课上做了几乎相同的事情，而且一切都很好。告诉我是否需要共享任何其他文件。新条目没有文本区域，只有那个按钮。

forms.py:

from django import forms
from .models import Topic, Entry
class TopicForm(forms.ModelForm):
class Meta:
model = Topic
fields = ['text']
labels = {'text': ''}
class EntryForm(forms.ModelForm):
class Meta:
model = Entry
fields = ['text']
labels = {'text': 'Entry:'}
widgets = {'text': forms.Textarea(attrs={'cols': 80})}

urls.py:

"""Defines URL patterns for learning_logs."""
from django.urls import path
from . import views
app_name = 'learning_logs'
urlpatterns = [
# Home page
path('',views.index, name='index'),
# Page that shows all topics.
path('topics/', views.topics, name='topics'),
# Detail page for a single topic.
path('topics/<int:topic_id>/', views.topic, name='topic'),
# Page for adding a new topic
path('new_topic/', views.new_topic, name='new_topic'),
# Page for adding a new entry
path('new_entry/<int:topic_id>/', views.new_entry, name='new_entry'),
]

views.py:

from django.shortcuts import render, redirect
from .models import Topic
from .forms import TopicForm, EntryForm
def index(request):
"""The home page for Learning Log."""
return render(request, 'learning_logs/index.html')
def topics(request):
"""Show all topics."""
topics = Topic.objects.order_by('date_added')
context = {'topics': topics}
return render(request,'learning_logs/topics.html',context)
def topic(request, topic_id):
"""Show a single topic and all its entries."""
topic = Topic.objects.get(id=topic_id)
entries = topic.entry_set.order_by('-date_added')
context = {'topic': topic, 'entries': entries}
return render(request, 'learning_logs/topic.html', context)
def new_topic(request):
"""Add a new topic."""
if request.method !='POST':
# No data submitted; create a black form.
form = TopicForm()
else:
# Post data submitted; process data.
form = TopicForm(data=request.POST)
if form.is_valid():
form.save()
return redirect('learning_logs:topics')
# Display a blank or invalid form
context = {'form': form}
return render(request,'learning_logs/new_topic.html',context)
def new_entry(request,topic_id):
"""Add a new entry for a particular topic."""
topic = Topic.objects.get(id=topic_id)
if request.method !='POST':
# No data submitted; create a blank form.
form = EntryForm()
else:
# POST data submitted; process data.
form = EntryForm(data=request.POST)
if form.is_valid():
new_entry = form.save(commit=False)
new_entry.topic = topic
new_entry.save()
return redirect('learning_logs:topic',topic_id=topic_id)
# Display a blank or invalid form.
context = {'topic': topic, 'form': form}
return render(request, 'learning_logs/new_entry.html', context) 

new_entry.html:

{% extends "learning_logs/base.html" %}
{% block content %}
<p><a href="{% url 'learning_logs:topic' topic.id %}">{{ topic }}</a></p>
<p>Add a new entry:</p>
<form action="{% url 'learning_logs:new_entry' topic.id %}" method='post'>
{% csrf_token %}
{{ forms.as_p }}
<button name='submit'>Add entry</button>
</form>
{% endblock content %}

models.py:

from django.db import models
class Topic(models.Model):
"""A topic the user is learning about."""
text = models.CharField(max_length=200)
date_added = models.DateTimeField(auto_now_add=True)

def __str__(self):
"""Return a string representation of the model."""
return self.text
class Entry(models.Model):
"""Something specific learned about a topic."""
topic = models.ForeignKey(Topic, on_delete=models.CASCADE)
text = models.TextField()
date_added = models.DateTimeField(auto_now_add=True)
class Meta:
verbose_name_plural = 'entries'
def __str__(self):
"""Return a string representation of the model."""
if len(self.text) > 50:
return f"{self.text[:50]}..."
else:
return f"{self.text}"   

Answer 1

您forgot可以在button中设置type="submit"。添加type="submit"，然后重试。

{% extends "learning_logs/base.html" %}
{% block content %}
<p><a href="{% url 'learning_logs:topic' topic.id %}">{{ topic }}</a></p>
<p>Add a new entry:</p>
<form action="{% url 'learning_logs:new_entry' topic.id %}" method='post'>
{% csrf_token %}
{{ form.as_p }}
<button type="submit" name='submit'>Add entry</button>
</form>
{% endblock content %}