关于unicloud-db查询问题，哪位同学指点一下

schema权限：
"permission": {
"read": "doc.customer_id == auth.uid && 'customer' in auth.role",
"create": "'customer' in auth.role",
"update": "doc.customer_id == auth.uid && 'customer' in auth.role",
"delete": "doc.customer_id == auth.uid && 'customer' in auth.role"
},

unicloud-db的where语句
const collectionList = ref([db.collection("sys-basic-school").where("customer_id==$cloudEnv_uid").getTemp(), db.collection("uni-id-users").field(
"_id, username, nickname").getTemp()])

需求：如果是超管登录，可以查看所有学校，如果是某个客户登录，则查看这个客户下的学校。where语句该怎么写？哪位同学指点一下？