sqlalchemy 中的.filter() 和.where() 之间的区别

Question

I've seen a few variations of running a query with SQLAlchemy. For example, here is one version:

posts = db.query(models.Post).filter(models.Post.owner_id==user.id).all()

What would be the difference between using the above or using .where ? Why are there two variations here?

Answer 1

According to the documentation , there is no difference.

method sqlalchemy.orm.Query.where(*criterion)

A synonym for Query.filter() .

It was added in version 1.4 by this commit . According to the commit message the reason to add it was to Convert remaining ORM APIs to support 2.0 style .

You can read more about "2.0 style" here .