python - 将字符串变量传递给 gql 查询

Question

到底如何使用 python 将字符串变量传递到 GQL？我可以在 SQL 中很好地完成它，但它就是不工作。这是我所拥有的:

personalposts = db.GqlQuery("select * from PersonalPost where user_id = %s order by created desc limit 30" % user_id)

这让我很难受，但我觉得应该很简单。

谢谢!

Answer 1

这应该有效:

personalposts = db.GqlQuery("select * from PersonalPost where user_id =:1 order by created desc limit 30",user_id)

GqlQuery 语法示例:

q = GqlQuery("SELECT * FROM Song WHERE composer = 'Lennon, John'")

q = GqlQuery("SELECT __key__ FROM Song WHERE composer = :1", "Lennon, John")

q = GqlQuery("SELECT * FROM Song WHERE composer = :composer", composer="Lennon, John")

来源: https://developers.google.com/appengine/docs/python/datastore/gqlqueryclass