[英]Peewee query with join doesn't work as expected
我是peewee的新手,目前正嘗試從普通的Python SQlite3庫遷移。
雖然我的代碼生成了一個有效的SQL查詢,該查詢使用SQlite DB瀏覽器返回了預期的結果,但嘗試獲取字段的值返回AttributeError: x object has no attribute y
。
模型:
class TableShows(BaseModel):
sonarr_series_id = IntegerField(column_name='sonarrSeriesId', unique=True)
title = TextField()
class Meta:
table_name = 'table_shows'
class TableHistory(BaseModel):
sonarr_series_id = ForeignKeyField(TableShows, field='sonarr_series_id', column_name='sonarrSeriesId')
class Meta:
table_name = 'table_history'
Peewee查詢:
data = TableHistory.select(
TableShows.title,
TableHistory.sonarr_series_id
).join(
TableShows
).order_by(
TableShows.title.asc()
)
產生的SQL查詢:
SELECT "t1"."title", "t2"."sonarrSeriesId"
FROM "table_history" AS "t2"
INNER JOIN "table_shows" AS "t1" ON ("t2"."sonarrSeriesId" = "t1"."sonarrSeriesId")
ORDER BY "t1"."title" ASC
結果dicts():
{'title': u'Test title', 'sonarr_series_id': 1}
為什么要運行此:
for item in data:
print item.title
返回此:
AttributeError: 'TableHistory' object has no attribute 'title'
http://docs.peewee-orm.com/zh-CN/latest/peewee/relationships.html#selecting-from-multiple-sources
您可以通過item.sonarr_series_id.title訪問數據
您可能會考慮為您的字段命名一些更Python的名稱。
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