peewee在select语句中未使用动态表名

Question

Why does the select statement here have t1 instead of MyDynamicTable ?

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()

Leads to:

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

But the name is correct:

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

Answer 1

Peewee has aliased your table name. If you read the full query:

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

The "mydynamictable" AS t1 part aliases the table name to "t1", to make the query more compact. This is especially important when you have joins and need to disambiguate columns with the same name.