Django template how to look up a dictionary value with a variable

Question

mydict = {\"key1\":\"value1\", \"key2\":\"value2\"}

The regular way to lookup a dictionary value in a Django template is {{ mydict.key1 }}

Answer 1

Environment: Django 2.2

1. Example code:

    from django.template.defaulttags import register

    @register.filter(name='lookup')
    def lookup(value, arg):
        return value.get(arg)

I put this code in a file named template_filters.py in my project folder named portfoliomgr

2. No matter where you put your filter code, make sure you have __init__.py in that folder

3. Add that file to libraries section in templates section in your projectfolder/settings.py file. For me, it is portfoliomgr/settings.py

    TEMPLATES = [
        {
            'BACKEND': 'django.template.backends.django.DjangoTemplates',
            'DIRS': [os.path.join(BASE_DIR, 'templates')],
            'APP_DIRS': True,
            'OPTIONS': {
                'context_processors': [
                    'django.template.context_processors.debug',
                    'django.template.context_processors.request',
                    'django.contrib.auth.context_processors.auth',
                    'django.contrib.messages.context_processors.messages',
                ],
                'libraries':{
                    'template_filters': 'portfoliomgr.template_filters',
                }
            },
        },
    ]

4. In your html code load the library

   
   {% load template_filters %}