Fixes return_url for image attachment (#12721)

* fixes return_url for image attachment #12538

* simplified conditions

* handle nonetype error

* fixed request check

* Introduce htmx_table template tag for embedding HTMX-backed object tables

---------

Co-authored-by: jeremystretch <jstretch@netboxlabs.com>

netbox/utilities/templates/builtins/htmx_table.html

@@ -0,0 +1,4 @@
+<div class="card-body htmx-container table-responsive"
+  hx-get="{% url viewname %}{% if url_params %}?{{ url_params.urlencode }}{% endif %}"
+  hx-trigger="load"
+></div>

netbox/utilities/templatetags/builtins/tags.py

@@ -1,4 +1,5 @@
 from django import template
+from django.http import QueryDict
 
 __all__ = (
     'badge',
@@ -74,3 +75,22 @@ def checkmark(value, show_false=True, true='Yes', false='No'):
         'true_label': true,
         'false_label': false,
     }
+
+
+@register.inclusion_tag('builtins/htmx_table.html', takes_context=True)
+def htmx_table(context, viewname, return_url=None, **kwargs):
+    """
+    Embed an object list table retrieved using HTMX. Any extra keyword arguments are passed as URL query parameters.
+
+    Args:
+        context: The current request context
+        viewname: The name of the view to use for the HTMX request (e.g. `dcim:site_list`)
+        return_url: The URL to pass as the `return_url`. If not provided, the current request's path will be used.
+    """
+    url_params = QueryDict(mutable=True)
+    url_params.update(kwargs)
+    url_params['return_url'] = return_url or context['request'].path
+    return {
+        'viewname': viewname,
+        'url_params': url_params,
+    }