Fix missing format field

Author: alexiri

astra_app/core/templates/admin/core/membership_csv_import.html

@@ -696,8 +696,8 @@ <h3 class="card-title">
               </div>
               <div class="card-body">
                 {% for field in form %}
-                  {% if field.name == "format" %}
-                    {# Format is inferred; skip rendering. #}
+                  {% if field.is_hidden %}
+                    {{ field }}
                   {% elif field.name == "import_file" %}
                     <div class="form-group field-name">
                       <div class="row">

astra_app/core/tests/test_admin_import_memberships_csv.py

@@ -121,6 +121,25 @@ def test_import_formats_csv_only(self) -> None:
         formats = admin_instance.get_import_formats()
         self.assertEqual(formats, [base_formats.CSV])
 
+    def test_import_page_includes_format_field(self) -> None:
+        self._login_as_freeipa_admin("alex")
+
+        admin_user = FreeIPAUser(
+            "alex",
+            {
+                "uid": ["alex"],
+                "mail": ["[email protected]"],
+                "memberof_group": ["admins"],
+            },
+        )
+
+        with patch("core.backends.FreeIPAUser.get", return_value=admin_user):
+            url = reverse("admin:core_membershipcsvimportlink_import")
+            resp = self.client.get(url)
+
+        self.assertEqual(resp.status_code, 200)
+        self.assertContains(resp, 'name="format"')
+
     def test_live_import_creates_membership_and_unmatched_export(self) -> None:
         MembershipType.objects.update_or_create(
             code="individual",