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MongoEngineでデータベースを切り替える

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Django + MongoEngineで、MongoDBのデータベースを切り替えるメモ。

MongoDBの接続先を分ける場合、settings内のconnect()に引数aliasに値を渡して別名をつける。

settings.py
from mongoengine import connect
connect("someproject", host="127.0.0.1:27017")
connect("someproject-log", host="127.0.0.1:27017", alias="log-db")  # ログ用データベース

ドキュメントクラス定義のmetadb_aliasを記述する。

documents.py
class AccessLogDocument(Document):
    time = DateTimeField()
    uri = StringField()
    status = IntField()
    reqtime = FloatField()
    upsttime = FloatField()

    meta = {
        "db_alias": "log-db",
    }
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