[#4701] Added missing data migration for the global config and zip mi…

…metypes

src/openforms/config/migrations/0059_alter_globalconfiguration_form_upload_default_file_types.py

@@ -4,6 +4,35 @@
 import django_jsonform.models.fields
 
 
+def add_extra_zip_mimetypes(apps, _):
+    """
+    Set up the correct zip mimetypes.
+
+    This ensures all the allowed mimetypes concerning zip files are included.
+    """
+    GlobalConfiguration = apps.get_model("config", "GlobalConfiguration")
+    if not GlobalConfiguration.objects.exists():
+        return
+
+    config = GlobalConfiguration.objects.get()
+    if current_mimetypes := config.form_upload_default_file_types:
+        needed_mime_types = (
+            "application/x-zip-compressed",
+            "application/zip-compressed",
+        )
+
+        def add_if_missing(current_list: list[str]):
+            for item in needed_mime_types:
+                if item not in current_list:
+                    current_list.append(item)
+
+        if "application/zip" in current_mimetypes:
+            add_if_missing(current_mimetypes)
+
+        config.form_upload_default_file_types = current_mimetypes
+        config.save()
+
+
 class Migration(migrations.Migration):
 
     dependencies = [
@@ -59,4 +88,8 @@ class Migration(migrations.Migration):
                 verbose_name="Default allowed file upload types",
             ),
         ),
+        migrations.RunPython(
+            add_extra_zip_mimetypes,
+            migrations.RunPython.noop,
+        ),
     ]