如何找到符合某些条件的猫鼬子文档

Question

My simplified schema looks like this:

var personSchema = new Schema({
    firstName: String,
    lastName: String
});

var teamSchema = new Schema({
    people: [personSchema]
});

module.exports = mongoose.model('Team', teamSchema);

And I want to find all the persons named "Alan". I looked at this very similar question , but it finds teams, not people. Same here , I think. Is there a query that returns persons even if I don't have a persons collection?

I think I can use the cited techniques to find teams, then pull out their people. Something like this, I guess:

teams
.find({})
.populate({
    path: 'people',
    match: { firstName: { $eq: "Alan" }}
})
.exec().then(function(teams) {
    var people = [];
    // walk through the found teams, looking through all the people
    // whenever one is found named Alan, add it to the people array
});

But there's a more direct way, right?

Answer 1

Per your comments, maybe you can try this one

teamSchema.statics.findPeople = function(name, cb) {
    return this.find({'people.firstName': name}, {'people.$': 1}, cb);
}

var Team = mongoose.model('Team', teamSchema);

Team.findPeople('Alan', function(err, data) {
     if (err)
         console.log(err);
     else
         console.log(data);
})