How to extend django template from python string
I have a string that looks like
string '''
<html>
<head>
{% block head %}{% endblock %}
... other stuff ...
</head>
<body>
{% block body %}{% endblock %}
... other stuff ...
</body>
</html>
'''
I would like the following django template to inherit from the above string:
{% block head %}
... other stuff ...
{% endblock %}
{% block body %}
<h1>Other stuff</h1>
{% endblock %}
Since the string is not in a file a can't just sp开发者_运维技巧ecify it's filename to the template rendering engine. Any ideas?
In order to implement string-only template extender, you would probably have to implement your template loader. Actually, a much cleaner solution is to use threed's suggestion below. Pass a parent Template() in the context rather than the name of disk template:
>>> from django.template import Context, Template
>>> extend_me = Template("Before A. {% block a %}{% endblock %}. After A")
>>> str_template = "{% extends parent %} {% block a %}This is inside A{% endblock %}"
>>> Template(str_template).render(Context({"parent": extend_me}))
u'Before A. This is inside A. After A'
Unfortunately this doesn't seem to work on django 1.3, possibly due to bug #7377 (you can't use the extends and block tags in string templates). Though it does work fine in 1.2. So if you happen to be running 1.3, you can look up the history of this question and use my hack :)
The extends template tag allows you to specify a variable name (since ver 1.0).
There's an example of it's usage in this question: How do I use Django's template extends variable?
It turns out there's an even simpler way to achieve this:
from google.appengine.ext.webapp import template
parent = template.Template("<html><body>{% block content %}{% endblock %}</body></html>")
path = os.path.join(os.path.dirname(__file__), 'index.html')
template.render(path, template.Context({"baseTemplate": parent}))
Where the index.html file looks like this:
{% extends baseTemplate %}
{% block content %}
<h1>Hello World!</h1>
{% endblock %}
In this case, the template object (as opposed to just a string) is passed into the context of the child template and used as the variable in the 'extends' tag.
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