Ticket #7903: 7903.patch

django/contrib/admin/templates/admin/change_form.html

@@ -66 +66 @@
     {% for dependency in field.dependencies %}
     document.getElementById("{{ dependency.auto_id }}").onkeyup = function() {
         var e = document.getElementById("{{ field.field.auto_id }}");
-        if (!e._changed) { e.value = URLify({% for innerdep in field.dependencies %}document.getElementById("{{ innerdep.auto_id }}").value{% if not forloop.last %} + ' ' + {% endif %}{% endfor %}, {{ field.field.field.max_length }}); }
+        if (!e._changed) { e.value = URLify({% for innerdep in field.dependencies %}document.getElementById("{{ innerdep.auto_id }}").value{% if not forloop.last %} + ' ' + {% endif %}{% endfor %}, {{ field.field.field.max_length|default_if_none:"50" }}); }
     }
     {% endfor %}
 {% endfor %}