逻辑OR MongoDB NodeJS查询

时间:2016-07-08 19:33:05

标签: json node.js mongodb logical-operators

在从NodeJS查询Mongo时,如何在同一个JSON字段上实现逻辑OR?

特别是,我有以下几行:

collection.find({"user":req.user.email, "parent._id":0}, function(err, activities){
    if (err) throw err;
    res.json(activities);
});

我怎样才能正确地包含“父”:{}这样的条目?

以下给我一个空数组:

collection.find({"user":req.user.email, "parent":{}, "parent._id":0}, function(err, activities){
        if (err) throw err;
        res.json(activities);
    });

1 个答案:

答案 0 :(得分:0)

工作代码:

collection.find({"user":req.user.email, $or:[{"parent._id":0},{"parent":{}}]}, function(err, activities){
        if (err) throw err;
        res.json(activities);
});