allow edit URL to be overridden from IndexView

This means we're not limited to named URL routes that take a single ID argument (which wouldn't work for snippets, for instance).

wagtail/admin/ui/tables.py

@@ -107,9 +107,10 @@ class TitleColumn(Column):
     """A column where data is styled as a title and wrapped in a link"""
     cell_template_name = "wagtailadmin/tables/title_cell.html"
 
-    def __init__(self, name, url_name=None, **kwargs):
+    def __init__(self, name, url_name=None, get_url=None, **kwargs):
         super().__init__(name, **kwargs)
         self.url_name = url_name
+        self._get_url_func = get_url
 
     def get_cell_context_data(self, instance, parent_context):
         context = super().get_cell_context_data(instance, parent_context)
@@ -117,7 +118,10 @@ class TitleColumn(Column):
         return context
 
     def get_link_url(self, instance, parent_context):
-        return reverse(self.url_name, args=(instance.pk,))
+        if self._get_url_func:
+            return self._get_url_func(instance)
+        else:
+            return reverse(self.url_name, args=(instance.pk,))
 
 
 class StatusFlagColumn(Column):

wagtail/admin/views/generic/models.py

@@ -29,9 +29,12 @@ class IndexView(PermissionCheckedMixin, WagtailAdminTemplateMixin, BaseListView)
             return self.columns
         except AttributeError:
             return [
-                TitleColumn('name', accessor=str, url_name=self.edit_url_name),
+                TitleColumn('name', accessor=str, get_url=lambda obj: self.get_edit_url(obj)),
             ]
 
+    def get_edit_url(self, instance):
+        return reverse(self.edit_url_name, args=(instance.pk,))
+
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         table = Table(self.get_columns(), context['object_list'])