查詢子文件貓鼬的NodeJS

Question

我在示例應用程序

該機型具有以下文件結構是學生和電話。我已將其配置爲如下所示

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; 

我可以在學生中插入學生文檔和多個電話文檔，如圖所示。

我試圖查詢子文檔

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); 
    }); 

}); 

請建議做的最好方法。

注：我知道我可以通過student.phone對象循環，但我發現它不是有效的方式。

Answer 1

根據文檔http://mongoosejs.com/docs/queries.html

你需要傳遞的選擇，以及如果你想使用findOne， 所以你的函數調用就會像

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

//Do what you want; 

}); 

編輯：

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

//Do what you want; 

});