Django模板中的form.as_p来自何处? [英] where `form.as_p`in django templates come from?

问题描述

我有一个通用视图和一个表单模板.
我的看法是:

I have a generic view and a form template.
my view is:

class BlogCreateView(CreateView):
    model = Post
    template_name = "post_new.html"
    fields = "__all__"

我的表单模板是:

{% extends "base.html" %}
{% block content %}
    <h1>New Post</h1>
    <form action="" method="POST">
        {% csrf_token %}
        {{ form.as_p }}
        <input type="submit" value="Save" />
    </form>
{% endblock content %}

现在我的问题是关于 form.as_p ，或者特别是 form .
那是哪里来的?

now my question is about form.as_p or specifically form.
Where did that come from?

请帮助我.非常感谢

推荐答案

SafeText 对象[Django-doc] ，其中包含要包含在模板中的HTML代码.

.as_p() [Django-doc] is a method on a Form. It produces a SafeText object [Django-doc] that contains HTML code to be included in the template.

它是 SafeText 的事实很重要，因为Django渲染引擎否则会转义"它:如果不使用 SafeText ，它将替换<和& lt; ;> 和& gt 等.当然，除非您自己将其包装在 SafeText 对象中，例如通过 | safe strong>模板过滤器[Django-doc] .

The fact that it is SafeText is important, since the Django render engine will otherwise "escape" it: without using SafeText, it would replace < with <; > with >, etc. Unless of course you wrap it in a SafeText object yourself, for example through the |safe template filter [Django-doc].

例如，我们可以定义一个在文档中:

We can for example define a form like in the documentation:

class OptionalPersonForm(forms.Form):
    first_name = forms.CharField()
    last_name = forms.CharField()
    nick_name = forms.CharField(required=False)

如果我们随后构造一个表单对象，则可以调用 .as_p()方法:

If we then construct a form object, we can call the .as_p() method:

>>> OptionalPersonForm().as_p()
'<p><label for="id_first_name">First name:</label> <input type="text" name="first_name" required id="id_first_name"></p>\n<p><label for="id_last_name">Last name:</label> <input type="text" name="last_name" required id="id_last_name"></p>\n<p><label for="id_nick_name">Nick name:</label> <input type="text" name="nick_name" id="id_nick_name"></p>'
>>> type(OptionalPersonForm().as_p())
<class 'django.utils.safestring.SafeText'>

Django表单具有三种流行的渲染方法: .as_p ， .as_ul() [Django-doc] .区别在于它们对HTML的呈现略有不同:作为段落，表格或无序的HTML列表.

Django forms have three popular rendering methods: .as_p, .as_table() [Django-doc] and .as_ul() [Django-doc]. The difference is that these render the HTML slightly differently: as paragraphs, a table or unordered HTML list.

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