相关疑难解决方法(0)

我在Firebase上有一个像这样的结构:

members
 |- -kSjJSDFjl2DFc
          |- isDeleted: true
          |- gender: "male"

在我的云功能中,我写道:

exports.doMemberDeletion = functions.database.ref("/members/{memberId}/isDeleted").onWrite(event => {
    const isDeleted = event.data.val();

    if (isDeleted) {
        const gender = event.data.ref.parent.child("gender").val; // Error here
        console.log("Deleted a " + gender + " member");
    }
});

但是,它会出错event.data.ref.parent.child().val,请告知如何在这种情况下获取值.谢谢!