python - sqlalchemy 过滤多列

Question

如何合并两列并应用过滤器？例如，我想同时在“firstname”和“lastname”列中进行搜索。如果只搜索一列，我就是这样做的:

query = meta.Session.query(User).filter(User.firstname.like(searchVar))

Answer 1

有很多方法可以做到:

使用 filter()(and 运算符)

query = meta.Session.query(User).filter(
    User.firstname.like(search_var1),
    User.lastname.like(search_var2)
    )

使用 filter_by()(and 运算符)

query = meta.Session.query(User).filter_by(
    firstname.like(search_var1),
    lastname.like(search_var2)
    )

链接 filter() 或 filter_by()(and 运算符)

query = meta.Session.query(User).\
    filter_by(firstname.like(search_var1)).\
    filter_by(lastname.like(search_var2))

使用 or_()、and_() 和 not()

from sqlalchemy import and_, or_, not_

query = meta.Session.query(User).filter(
    and_(
        User.firstname.like(search_var1),
        User.lastname.like(search_var2)
    )
)