50 lines
1.4 KiB
Python
50 lines
1.4 KiB
Python
import logging
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from typing import Dict, Iterable, Tuple
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from sqlalchemy.orm import Session
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from platypush.entities import Entity
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# pylint: disable=no-name-in-module
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from platypush.entities._engine.repo.db import EntitiesDb
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from platypush.entities._engine.repo.merger import EntitiesMerger
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logger = logging.getLogger('entities')
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class EntitiesRepository:
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"""
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This object is used to get and save entities. It wraps the database
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connection.
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"""
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def __init__(self):
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self._db = EntitiesDb()
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self._merger = EntitiesMerger(self)
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def get(
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self, session: Session, entities: Iterable[Entity]
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) -> Dict[Tuple[str, str], Entity]:
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"""
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Given a set of entity objects, it returns those that already exist
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(or have the same ``entity_key``).
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"""
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return self._db.fetch(session, entities)
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def save(self, *entities: Entity) -> Iterable[Entity]:
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"""
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Perform an upsert of entities after merging duplicates and rebuilding
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the taxonomies.
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"""
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with self._db.get_session(
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locked=True,
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autoflush=False,
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autocommit=False,
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expire_on_commit=False,
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) as session:
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merged_entities = self._merger.merge(session, entities)
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merged_entities = self._db.upsert(session, merged_entities)
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return merged_entities
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