peewee在select语句中没有使用动态表名

Question

为什么这里的select语句包含MyDynamicTable而不是from peewee import * database = SqliteDatabase(None) class Base(Model): class Meta: database = database class MyTable(Base): FieldA = TextField() FieldB = TextField() mytable = type('MyDynamicTable', (MyTable,), {}) database.init('test.db') mytable.select() ？

>>> mytable.select()
<class 'peewee.MyDynamicTable'> SELECT "t1"."id", "t1"."FieldA", "t1"."FieldB" FROM "mydynamictable" AS t1 []

导致：

>>> mytable
<class 'peewee.MyDynamicTable'>
>>> mytable._meta.db_table
'mydynamictable'

但名字是正确的：

$ echo $PATH
/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin
$ whereis xcrun
/usr/bin/xcrun

Answer 1

Peewee给你的桌名别名。如果您阅读完整查询：

SELECT "t1"."id", "t1"."FieldA", "t1"."FieldB"
FROM "mydynamictable" AS t1

＆＃34; mydynamictable＆＃34; AS t1 部分将表名别名为＆＃34; t1＆＃34;，以使查询更紧凑。当您有连接并且需要消除具有相同名称的列的歧义时，这一点尤为重要。