Use `.iterator()` from peewee when querying

Closes #15 (closed)

worker_generic_training_dataset/worker.py

@@ -154,7 +154,7 @@ class DatasetExtractor(DatasetWorker):
                 state=classification.state,
                 worker_run_id=get_object_id(classification.worker_run),
             )
-            for classification in list_classifications(element.id)
+            for classification in list_classifications(element.id).iterator()
         ]
         if classifications:
             logger.info(f"Inserting {len(classifications)} classification(s)")
@@ -178,7 +178,7 @@ class DatasetExtractor(DatasetWorker):
                 worker_version_id=get_object_id(transcription.worker_version),
                 worker_run_id=get_object_id(transcription.worker_run),
             )
-            for transcription in list_transcriptions(element.id)
+            for transcription in list_transcriptions(element.id).iterator()
         ]
         if transcriptions:
             logger.info(f"Inserting {len(transcriptions)} transcription(s)")
@@ -194,7 +194,9 @@ class DatasetExtractor(DatasetWorker):
         entities: List[CachedEntity] = []
         transcription_entities: List[CachedTranscriptionEntity] = []
         for transcription in transcriptions:
-            for transcription_entity in list_transcription_entities(transcription.id):
+            for transcription_entity in list_transcription_entities(
+                transcription.id
+            ).iterator():
                 entity = CachedEntity(
                     id=transcription_entity.entity.id,
                     type=transcription_entity.entity.type.name,
@@ -329,7 +331,7 @@ class DatasetExtractor(DatasetWorker):
             # List children
             children = list_children(element.id)
             nb_children: int = children.count()
-            for child_idx, child in enumerate(children, start=1):
+            for child_idx, child in enumerate(children.iterator(), start=1):
                 logger.info(f"Processing child ({child_idx}/{nb_children})")
                 # Insert child
                 self.insert_element(child, parent_id=element.id)