introduce detailed logging for every database action

mc_backend/mcserver/app/api/corpusListAPI.py

@@ -16,6 +16,7 @@ def get(last_update_time: int) -> Union[Response, ConnexionResponse]:
     ui_cts: UpdateInfo
     try:
         ui_cts = db.session.query(UpdateInfo).filter_by(resource_type=ResourceType.cts_data.name).first()
+        db.session.commit()
     except (InvalidRequestError, OperationalError):
         db.session.rollback()
         return NetworkService.make_json_response(None)

mc_backend/mcserver/app/services/databaseService.py

@@ -20,6 +20,7 @@ class DatabaseService:
     def check_corpus_list_age(app: Flask) -> None:
         """ Checks whether the corpus list needs to be updated. If yes, it performs the update. """
         ui_cts: UpdateInfo = db.session.query(UpdateInfo).filter_by(resource_type=ResourceType.cts_data.name).first()
+        db.session.commit()
         if ui_cts is None:
             return
         else:

mc_backend/mcserver/config.py

@@ -127,6 +127,7 @@ class Config(object):
     SERVER_URI_VOCABULARY = SERVER_URI_BASE + "vocabulary"
     # END endpoints
     SQLALCHEMY_DATABASE_URI = os.environ.get("DATABASE_URL") or DATABASE_URL_SQLITE
+    SQLALCHEMY_ECHO = True
     SQLALCHEMY_TRACK_MODIFICATIONS = False
     STATIC_EXERCISES_REPOSITORY_URL = "https://scm.cms.hu-berlin.de/callidus/machina-callida/-/archive/master/machina-callida-master.zip?path=mc_frontend%2Fsrc%2Fassets%2Fh5p"
     STOP_WORDS_LATIN_PATH = os.path.join(CACHE_DIRECTORY, "stop_words_latin.json")