Add url prefix template filter

aleksis/core/templates/core/data_check/list.html

@@ -2,6 +2,7 @@
 
 {% extends "core/base.html" %}
 {% load data_helpers %}
+{% load html_helpers %}
 
 {% load i18n %}
 {% load render_table from django_tables2 %}
@@ -59,7 +60,7 @@
                 <td>{{ result.related_object }}</td>
                 <td>{{ result.related_check.problem_name }}</td>
                 <td>
-                  <a class="btn-flat waves-effect waves-light" href="{{ result.related_object.get_absolute_url }}" target="blank">
+                  <a class="btn-flat waves-effect waves-light" href="{{ result.related_object.get_absolute_url|remove_prefix:"/django/" }}" target="_blank">
                     {% trans "Show object" %}
                   </a>
                 </td>

aleksis/core/templatetags/html_helpers.py

 import random
 import string
 
+from urllib.parse import urlparse
+
 from django import template
 from django.shortcuts import reverse
 
@@ -28,6 +30,24 @@ def add_class_to_el(value: str, arg: str) -> str:
     return str(soup)
 
 
+@register.filter
+def remove_prefix(value: str, prefix: str) -> str:
+    """Remove prefix of a url
+
+    :Example:
+
+    .. code-block::
+
+        {{ object.get_absolute_url|remove_prefix: "/django/" }}
+    """
+    url = urlparse(value)
+
+    if url.path.startswith(prefix):
+        url = url._replace(path=url.path[len(prefix):])
+
+    return url.geturl()
+
+
 @register.simple_tag
 def generate_random_id(prefix: str, length: int = 10) -> str:
     """Generate a random ID for templates.