Inside a Django template I have such a phrase:
<h4>{{ webinar.name or 'Not title' }}</h4>
leading to this error:
Could not parse the remainder: ' or 'Not title'' from 'webinar.name or 'Not title''
This is because Django does not like to calculate operators inside a template. It seems that django-mathfilters does not have an or operator. I also do not like to use {% if ... %} either. Because this is a MWE. I have faced with other cases that I cannot get around them so easy.