我目前正在尝试为我的基地中的帖子类别创建一个下拉菜单.html以便它显示在我的每个模板上。 稍后，我希望用户只需单击类别项目并转到特定类别。
我有点困惑我应该在我的表格中包含什么以及如何在我的基地中称呼该表格.html。
基地.html
...
<body>
<div class="page-header">
{% if user.is_authenticated %}
<a href="{% url 'logout' %}" class="top-menu"><button type="button" class="btn btn-danger">Logout</button></a>
<a href="{% url 'logout' %}" class="top-menu"><button type="button" class="btn btn-default">Account</button></a>
<a href="{% url 'post_new' %}" class="top-menu"><span class="glyphicon glyphicon-plus"></span></a>
{% endif %}
{% if user.is_anonymous %}
<a href="{% url 'signup' %}" class="top-menu"><button type="button" class="btn btn-success">Sign-Up</button></a>
<a href="{% url 'login' %}" class="top-menu"><button type="button" class="btn btn-primary">Login</button></a>
{% endif %}
<div class="fieldWrapper">
<label for="{{ category_form.category.id_for_label }}">Select a category:</label>
{{ category_form.category }}
</div>
views.py：
from .forms import PostForm
def category_dropdown(request):
return render (request, 'quickblog/base.html')
models.py
...
# Categorys of Post Model
class Category(models.Model):
title = models.CharField(max_length=255, verbose_name="Title")
description = models.TextField(max_length=1000, null=True)
categorycover = fields.ImageField(upload_to='categorycovers/', blank=True, null=True, dependencies=[
FileDependency(processor=ImageProcessor(
format='JPEG', scale={'max_width': 600, 'max_height': 600}))
])
class Meta:
verbose_name = "Category"
verbose_name_plural = "Categories"
ordering = ['title']
def __str__(self):
return self.title
#Post Model
class Post(models.Model):
author = models.ForeignKey('auth.User', on_delete=models.CASCADE)
title = models.CharField(max_length=200)
text = models.TextField(max_length=10000)
category = models.ForeignKey(Category, verbose_name="Category", on_delete=models.CASCADE, null=True)
tag = models.CharField(max_length=50, blank=True)
...
forms.py
class PostForm(forms.ModelForm):
class Meta:
model = Post
fields = ['title', 'text', 'category', 'tag', 'postcover', 'postattachment',]
captcha = CaptchaField()
settings.py
...
TEMPLATE_CONTEXT_PROCESSORS = (
'django.core.context_processors.auth',
'django.core.context_processors.debug',
'django.core.context_processors.i18n',
'quickblog.quickblog.context_processors.category_form',
)
...
context_processor.py
from .forms import PostForm
def category_form(request):
form = PostForm()
return {'category_form': form}
谢谢:)
Django 会自动将其设置为包含您当前表单代码的下拉菜单。您只需要使用上下文处理器使该表单可用。
在设置文件中的"模板"下，context_processors添加类似"your_project.your_app.context_processor.category_form"之类的内容
在您的应用程序(我相信快速博客(中添加一个文件：
context_processors.py
from .forms import PostForm
def category_form(request):
form = PostForm()
return {'category_form': form}
顺便说一下，为了重现您当前的代码，我必须进行一些更改。
在 views.py 我把categories = Category.objects.title()改成了categories = Category.objects.only('title')
然后摆脱了它，只是使用了表单
from .forms import PostForm
def category_dropdown(request):
form = PostForm()
return render(request, 'quickblog/base.html', {'form': form})
然后最后
def category_dropdown(request):
return render (request, 'quickblog/base.html')
因为context_processor现在正在做这项工作。
我相信在您的评论中，您是在问如何仅呈现下拉列表。
在您的模板中，您将执行以下操作：
<div class="fieldWrapper">
<label for="{{ category_form.category.id_for_label }}">Select a category:</label>
{{ category_form.category }}
</div>
有关更多详细信息，请参阅 Django 关于该主题的文档。
我用来让它工作的文件
models.py
from django.db import models
# Categorys of Post Model
class Category(models.Model):
title = models.CharField(max_length=255, verbose_name="Title")
description = models.TextField(max_length=10000, null=True)
class Meta:
verbose_name = "Category"
verbose_name_plural = "Categories"
ordering = ['title']
def __str__(self):
return self.title
#Post Model
class Post(models.Model):
author = models.ForeignKey('auth.User', on_delete=models.CASCADE)
title = models.CharField(max_length=200)
text = models.TextField(max_length=10000)
category = models.ForeignKey(Category, verbose_name="Category", on_delete=models.CASCADE, null=True)
forms.py
from django import forms
from .models import Post
class PostForm(forms.ModelForm):
class Meta:
model = Post
fields = ['title', 'text', 'category']
settings.py
...
TEMPLATES = [
{
'BACKEND': 'django.template.backends.django.DjangoTemplates',
'DIRS': [os.path.join(BASE_DIR, 'templates')]
,
'APP_DIRS': True,
'OPTIONS': {
'context_processors': [
'django.template.context_processors.debug',
'django.template.context_processors.request',
'django.contrib.auth.context_processors.auth',
'django.contrib.messages.context_processors.messages',
'django_settings_export.settings_export',
'quickblog.context_processors.category_form'
],
},
},
]
...
你可以这样给我们一些东西：
Forms.py：
class MyModel2(forms.Form):
color = forms.CharField(widget=forms.Select)
索引.html：
<form method="POST" action = "ACTION_OR_VIEW_URL_ON_SUBMIT_HERE">{% csrf_token %}
<label for="colorSelect">Choose color</label>
<select type="text" id="colorSelect" name="colorSelect">
<option selected>GREEN</option>
<option>BLUE</option>
<option>RED</option>
<option>ORANGE</option>
<option>BLACK</option>
</select>
<br><br>
<input type="submit" value="Submit!"/>
</form>