In [1]: from cost_app.models import AccountInfo                                                                                                                                              

In [2]: print(str(AccountInfo.objects.all().query))                                            

{% for api in  item.important_apis.all%} <-!>注意这里用的是all</-!>
........{{ api.full_url }}
{% endfor %}

def item_check(request):
    if request.method == 'GET':
        item_id = request.GET.get('id')
        item = CheckItem.objects.get(id=item_id)
        ns

pip install djangorestframework
pip install markdown       # Markdown support for the browsable API.
pip install django-filter  # Filtering support

INSTALLED_APPS = [
    ...
    'rest_framework',
]