Fix missing Translator model in upgrade step

Author: Tschuppi81

src/onegov/search/upgrade.py

@@ -7,6 +7,7 @@
 
 from onegov.core.upgrade import upgrade_task, UpgradeContext
 from onegov.search.utils import searchable_sqlalchemy_models
+from onegov.translator_directory.models.translator import Translator
 
 
 @upgrade_task('Adds fts index column to all searchable models')
@@ -30,11 +31,15 @@ def adds_index_data_columns(context: UpgradeContext) -> None:
 
 @upgrade_task('Adds fts data column (json) to all searchable models')
 def adds_fts_index_data_column(context: UpgradeContext) -> None:
-    models = (
+    models = [
         model
         for base in context.app.session_manager.bases
         for model in searchable_sqlalchemy_models(base)
-    )
+    ]
+
+    # I observed that the Translator model may not included in the models list
+    models.append(Translator) if Translator not in models else None
+
     for model in models:
         assert hasattr(model, '__tablename__')
         if not context.has_column(model.__tablename__, 'fts_idx_data'):