创建自定义模板标签以替换for循环-Django

Question

I am trying to simplify my code by creating a custom template tag for a 'for loop' that use frequently on my Django web application. I thought it would be a simple straight process, but something isn't working right... I can use some assistance in catching my error.

Here is my code. views.py

 class ArticleView(DetailView):
    model = Articles

    def get_context_data(self, **kwargs):
      context = super(ArticleView, self).get_context_data(**kwargs)
      context['s_terms'] = scientific_terms.objects.all()
      return context

template tag

@register.filter(name='term')
def term(value):
  {% for term in s_terms %}
        {{ term.short_description }}
  {% endfor %}

template.html

{% Neurons|term %}

Thank you for your assistance, in advance.

Answer 1

You are mixing Python code with the Django Template Language. The template tags are plain Python code, as they are defined inside a Python module. A working example would be:

@register.filter(name='term')
def term(terms):
  output = ''
  for term in terms:
      output = '{0} {1}'.format(output, term.short_description)
  return output

Then you could use it like this:

{{ s_terms|term }}

Maybe what you want is simply to create a reusable Django template.

For example, create a new template named terms.html :

templates/terms.html

{% for term in terms %}
    <p>{{ term.short_description }}</p>
{% endfor %}

Then, in another template, you could include this partial template:

templates/index.html (name is just an example)

{% extends 'base.html' %}

{% block content %}
    <h1>My application</h1>
    {% include 'terms.html' with terms=s_terms %}
{% endblock %}