django template tag missing 1 required positional argument : value
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django template tag missing 1 required positional argument : value
In my django project I have custom template tag to set correct next link in pagination :
@register.tag(name='url_replace')
def url_replace(request, field, value):
print('this is form tag',request,field,value)
d = request.GET.copy()
d[field] = value
return d.urlencode()
In my template :
{% if is_paginated %}
<ul class="pagination pull-right">
{% if page_obj.has_previous %}
<li><a href="?{% url_replace request 'page' page_obj.previous_page_number %}">«</a></li>
{% else %}
<li class="disabled"><span>«</span></li>
{% endif %}
{% for i in paginator.page_range %}
{% if page_obj.number == i %}
<li class="active"><span>{{ i }} <span class="sr-only">(current)</span></span></li>
{% else %}
<li><a href="?{% url_replace request 'page' i %}">{{ i }}</a></li>
{% endif %}
{% endfor %}
{% if page_obj.has_next %}
<li><a href="?{% url_replace request 'page' page_obj.next_page_number %}">»</a></li>
{% else %}
<li class="disabled"><span>»</span></li>
{% endif %}
</ul>
{% endif %}
Looks every thing fine but it is showing me error
Exception Value:
url_replace() missing 1 required positional argument: 'value'
I am unable to figure out the problem as I passed all three arguments !
1 Answer
1
Change the @register.tag to @register.simple_tag. @register.tag is something bit more complicated
@register.tag
@register.simple_tag
compare
https://docs.djangoproject.com/en/2.0/howto/custom-template-tags/#django.template.Library.simple_tag
with
https://docs.djangoproject.com/en/2.0/howto/custom-template-tags/#registering-the-tag
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