Merge branch '2711-snapshot-issue' into 'develop'

Snapshot issue

Closes #2711

See merge request baserow/baserow!3050

backend/src/baserow/contrib/database/fields/utils/deferred_foreign_key_updater.py

@@ -59,7 +59,7 @@ class DeferredForeignKeyUpdater:
                     setattr(
                         field_to_bulk_update,
                         attr_name,
-                        id_mapping[mapping_key][desired_field_id],
+                        id_mapping.get(mapping_key, {}).get(desired_field_id, None),
                     )
             if len(fields_to_bulk_update) > 0:
                 field_model_class.objects.bulk_update(

backend/tests/baserow/contrib/database/import_export/test_import_export.py

@@ -0,0 +1,47 @@
+import pytest
+
+from baserow.contrib.database.application_types import DatabaseApplicationType
+from baserow.contrib.database.fields.handler import FieldHandler
+from baserow.contrib.database.fields.models import RollupField
+from baserow.contrib.database.table.handler import TableHandler
+from baserow.core.registries import ImportExportConfig
+
+
+@pytest.mark.import_export_workspace
+@pytest.mark.django_db()
+def test_import_export_works_with_invalid_rollup_field(data_fixture):
+    user = data_fixture.create_user()
+    table_a, table_b, link_a_to_b = data_fixture.create_two_linked_tables(user=user)
+    rollup_field = FieldHandler().create_field(
+        user,
+        table_a,
+        "rollup",
+        name="rollup_field",
+        through_field_name=link_a_to_b.name,
+        target_field_id=table_b.get_primary_field().id,
+        rollup_function="min",
+    )
+
+    TableHandler().delete_table(user, table_b)
+    rollup_field.refresh_from_db()
+    assert rollup_field.formula_type == "invalid"
+
+    import_export_config = ImportExportConfig(
+        include_permission_data=False, reduce_disk_space_usage=True
+    )
+    exported_db = DatabaseApplicationType().export_serialized(
+        table_a.database, import_export_config
+    )
+
+    assert (
+        "references the deleted or unknown field"
+        in exported_db["tables"][0]["fields"][1]["error"]
+    )
+
+    imported_app = DatabaseApplicationType().import_serialized(
+        table_a.database.workspace, exported_db, import_export_config, {}
+    )
+
+    imported_field = RollupField.objects.get(table=imported_app.table_set.first())
+    assert imported_field.formula_type == "invalid"
+    assert "references the deleted or unknown field" in imported_field.error

changelog/entries/unreleased/bug/2711_fix_importexportsnapshot_issue_with_broken_formulas.json

@@ -0,0 +1,7 @@
+{
+    "type": "bug",
+    "message": "Fix import/export/snapshot issue with broken formulas",
+    "issue_number": 2711,
+    "bullet_points": [],
+    "created_at": "2025-01-15"
+}