查询子文档猫鼬nodejs

Question

I have below document structure in my sample app

The models are Student and Phone. I have configured it as like below

    var mongoose = compound.mongoose;

    var PhoneSchema = new mongoose.Schema({
        type: String,
        number: String
    });

    var StudentSchema =  new mongoose.Schema({
        name: String,
        dept: String,
        year: String,
        phone: [PhoneSchema]    
    });

    var Phone = mongoose.model('Phone',PhoneSchema);
    var Student = mongoose.model('Student',StudentSchema);

    Phone.modelName = 'Phone';
    compound.models.Phone = Phone;

    Student.modelName = 'Student';
    compound.models.Student = Student;

I could able to insert a Student document and multiple phone documents within the student as shown.

I am trying to query the subdocument

compound.models.Student.findOne({ "name" : "prabhu" }, function(err, student){

    console.log(student);
    console.log("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~");

    ###########This line shows error, no method find one for student.phone.
    student.phone.findOne({ "number" : "123456" }, function(err, phone){
        console.log(phone);
    });

});

Please suggest the best method to do it.

Note : I am aware i can loop through the student.phone object, but i find its not efficient way.

Answer 1

According to the documentation http://mongoosejs.com/docs/queries.html

You need to pass on the selectors as well if you want to use findOne, so your function call will be like

compound.models.Student.findOne({ "name" : "prabhu" }, 'name dept', function(err, student)       {

//Do what you want;

});

EDITED:

  compound.models.Student.findOne({ "name" : "prabhu","phone.number":1234 }, 'name dept', function(err,     student)       {

//Do what you want;

});