如何用Peewee做一个.where（somecolumn == None / Null / Empty）？

Question

I'm using peewee in my Flask application and I have one column in a table which can be null:

somecolumn = ForeignKeyField(Something, related_name='messages', null = True, default=None)

I now want to select all records in which somecolumn is not null/None/Empty. I tried to do this with the following:

Message.select().where(Message.somecolumn != None)
Message.select().where(Message.somecolumn != '')

Unfortunately, neither works. Does anybody know how I can do this? All tips are welcome!

Answer 1

我不是一个peewee专家，但从文档（ 查询 ）看起来你需要：

Message.select().where(Message.somecolumn >> None)

Answer 2

It's a possibility:

Message.select().where(Message.somecolumn.is_null(False))

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