where `form.as_p`in django templates come from?

Question

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

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

and my form template is:

{% 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 %}

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

help me please. thanks a lot

It comes from the `render()` call: `render(request, 'foo.html', {'form': form})` — John Gordon, Aug 10 '19 at 17:41

score 3 · Accepted Answer · answered Aug 10 '19 at 17:50

.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.

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].

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)

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 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.

where `form.as_p`in django templates come from?

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