Django 模板 - 如何检查动态构造的键是否在对象中具有值

Question

I've an object that contains names like

draft = {
  "name_ar": "test arabic",
  "name_en": "test english",
  "name_tr": "test turkish",
  "name_nl": "",
}

and I've language_code variable which will have either 'ar' or 'en' values. So before checking if key has value in the object what I did is I constructed the key first like below

{% with name='name_'|add:language_code %}

So now my query is I want to add class grey-color to div container if name doesn't have value in draft object. How can I achieve this?

{% with name='name_'|add:language_code %}
   <span class="secondary-title {% if not "how can I check here" %}grey-color{% endif %}">
{% endif %}

I'm very new to Django so happy to hear any suggestions or solution.

Answer 1

I solved the issue using template tags

@register.filter('get_value_from_dict')
def get_value_from_dict(dict_data, key):
    """
    usage example {{ your_dict|get_value_from_dict:your_key }}
    """
    if key:
        return dict_data.get(key)

and then in template

<span class="secondary-title {% if not draft|get_value_from_dict:name %}grey-color{% endif %}">