feat(generic): add export support to list views

using https://django-tables2.readthedocs.io/en/latest/pages/export.html

apis_core/generic/views.py

@@ -1,5 +1,6 @@
 from collections import namedtuple
 from copy import copy
+from datetime import datetime
 
 from dal import autocomplete
 from django import forms, http
@@ -21,6 +22,7 @@
 from django_filters.views import FilterView
 from django_tables2 import SingleTableMixin
 from django_tables2.columns import library
+from django_tables2.export.views import ExportMixin
 from django_tables2.tables import table_factory
 
 from apis_core.apis_metainfo.models import Uri
@@ -100,6 +102,7 @@ def get_permission_required(self):
 class List(
     GenericModelMixin,
     PermissionRequiredMixin,
+    ExportMixin,
     SingleTableMixin,
     FilterView,
 ):
@@ -123,6 +126,15 @@ def get_table_class(self):
         table_class = first_member_match(table_modules, GenericTable)
         return table_factory(self.model, table_class)
 
+    def get_export_filename(self, extension):
+        table_class = self.get_table_class()
+        if hasattr(table_class, "export_filename"):
+            filename = table_class.export_filename
+        else:
+            now = datetime.now()
+            filename = f"{table_class.__name__}_{now.strftime('%Y-%m-%d_%H-%M-%S')}"
+        return f"{filename}.{extension}"
+
     def get_table_kwargs(self):
         kwargs = super().get_table_kwargs()