从Django中的数据库呈现自定义模板标签 [英] Rendering custom template tags from database in Django

问题描述

我对Django很新，我正在为我的网站建立一个博客应用程序。我有一个我创建的模型来存储博客文章，其中包含一个文本字段的文章，使用TinyMCE（通过Grappelli）创建和转换为HTML。我希望在该文本框内嵌入自定义模板标签，该模板标签作为模板标签保存在数据库中，但在我的网站上请求时，将其呈现为HTML。到目前为止，我没有任何运气让标签正确渲染。如何让Django在我的帖子中正确解释和呈现模板标签？自定义标签在加载并直接在模板中实现时正常工作，只是这种间接加载给我带来麻烦。我试过这段代码片段（编辑：它的工作原理，我只是做了

这是我的观点：

  from django.shortcuts import render_to_response 
 from myproject.apps.blog.models import Post 
 
 def blog_detail_view（request，year，month，day，slug）：
 selected_post = Post.objects.get（status = 1，pub_date__year = year，pub_date__month = time.strptime（month，％b）[1]，pub_date__day = day，slug = slug）
 return render_to_response blog / detail.html'，locals（））
  

我的模板的相关部分： p>

  ... 
 {％load my_custom_tag％} 
 
< div class =entry > 
 {{selected_post.body | safe}} 
< / div> 
 ... 
  

以下是保存到 Post.body ：

 我的第一段。 
 {％my_custom_tag var1 var2％} 
我的第二段。 
  

目前，这将呈现为：

 < p>我的第一个段落< / p> 
< p> {％my_custom_tag var1 var2％}< / p> 
< p>我的第二段。< / p> 
  

当我想要这样的东西：

 < p>我的第一个段落< / p> 
< p>< a href =var1>< img src =var2>< / a>< / p> 
< p>我的第二段。< / p> 
  

解决方案

事实证明， render_as_template 标签发现这里工作，我只是误解了它。初学者的错误在我自己无法接受的代码段的文档中没有指定两件事。

所以，你把您的模板中的render_as_template 标签，如下所示：

  {％load render_as_template％} 
 { ％render_as_template myobject.attribute％} 
  

因此，允许 myobject中的任何模板标签。属性。这是我遇到麻烦的地方：

首先，我将我的帖子正文传递给 render_as_template 为 selected_post.body | truncatewords_html：100| safe 或作为 selected_post.body | safe 。模板标签无法处理属性上的过滤器，似乎将其解释为对象名称的一部分。由于此对象不存在，因此不会呈现任何内容。我在模板中需要的是：

  {％autoescape off％} 
 {％filter truncatewords_html：100 $} 
 {％render_as_template selected_post.body％} 
 {％endfilter％} 
 {％endautoescape％} 
  

第二，如果我的帖子的内容是：

 我的第一段。 
 {％my_custom_tag var1 var2％} 
我的第二段。 
  

然后为了 my_custom_tag 被解释，我需要添加到我的帖子中：

  {％load my_custom_tag％} 
  

现在它的效果很好！

I am pretty new to Django and am trying to build a blog app for my website. I have a model I have created to store blog posts that includes a text field for the post body, created and converted to HTML using TinyMCE (via Grappelli). I would like embed custom template tags within this post body that are saved in the database as the template tag, but then rendered as HTML when requested on my site. So far, I am not having any luck getting the tags to render properly. How can I get Django to correctly interpret and render the template tags within my post? The custom tag works fine when loaded and implemented directly in a template, it is just this indirect loading that gives me trouble. I tried this snippet here (Edit: It works, I just did it wrong!), but it did not work correctly.

Here is my view:

from django.shortcuts import render_to_response
from myproject.apps.blog.models import Post

def blog_detail_view(request, year, month, day, slug):
    selected_post = Post.objects.get(status=1, pub_date__year = year, pub_date__month = time.strptime(month, "%b")[1], pub_date__day = day, slug = slug)
    return render_to_response('blog/detail.html', locals())

And the relevant portion of my template:

...
{% load my_custom_tag %}

<div class="entry">
    {{ selected_post.body|safe }}
</div>
...

Here is an example of the text saved to Post.body:

My first paragraph.
{% my_custom_tag var1 var2 %}
My second paragraph.

Currently, this will render as :

<p>My first paragraph.</p>
<p>{% my_custom_tag var1 var2 %}</p>
<p>My second paragraph.</p>

When I want something like this:

<p>My first paragraph.</p>
<p><a href="var1"><img src="var2"></a></p>
<p>My second paragraph.</p>

解决方案

It turns out that the render_as_template tag found here DOES work, I just misunderstood it. Beginner's mistake. There are two things that were not specified in the documentation for the snippet that I failed to pick up on my own.

So, you put the render_as_template tag in your template like this:

{% load render_as_template %}
{% render_as_template myobject.attribute %}

Thus allowing any template tags within myobject.attribute to be rendered. Here is where I ran into trouble:

First, I was passing my post body to render_as_template as selected_post.body|truncatewords_html:"100"|safe or as selected_post.body|safe. The template tag is unable to process the filters on the attribute and seems to interpret them as part of the object's name. Since this object does not exist, nothing is rendered. What I need in my template is:

{% autoescape off %}
{% filter truncatewords_html:"100" %}
{% render_as_template selected_post.body %}
{% endfilter %}
{% endautoescape %}

Second, if the content of my post is:

My first paragraph.
{% my_custom_tag var1 var2 %}
My second paragraph.

Then in order for my_custom_tag to be interpreted, I need to add to my post:

{% load my_custom_tag %}

Now it works perfectly!

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