Question

我是一个新鲜的猫鼬用户，我有一个小练习，我有这个架构

＆＃13;

`var BusinessSchema = mongoose.Schema({
    personal_email: { type: String, required: true, unique: true },
    business_name: { type: String, required: true, unique: true },
    business_emails: [{ email: String, Description: String }],  
    business_logo: { data: Buffer, contentType: String },
    //Business Services
    services: [{
        service_name: { type:String,required:true},
        service_price: Number,
        promotion_offer : Number,   
        service_rating : [{Clinet_username:String ,rating : Number}],   
        service_reviews : [{Clinet_username:String ,review : String}],  
        type_flag : Boolean,    
        available_flag : Boolean    
    }]
});`

＆＃13;

我想要做的是使用mongoose更新或添加新服务或删除评级

＆＃13;

business.update({// something here to update service_rating },function(err,found_business)
          {
           }); business.update({// something here to add new service_rating },function(err,found_business)
          {
           }); business.update({// something here to delete service_rating },function(err,found_business)
          {
           });

＆＃13;

Answer 1

var where_clause = { /* your where clause */ };
var service_rating = {"username", 5};

添加：

business.update(where_clause, {
    '$addToSet' : {
        services.service_rating : service_rating 
    }
}, callback);

删除：

business.update(where_clause, { 
    '$pull' : {
        services.service_rating : service_rating
    }
}, callback);

更新：

var other_where = {services.service_rating : {"user", 5}}; // your where clause

business.update(other_where, {
    '$set': {
        'services.service_rating.Clinet_username' : 'newUser', 
        'services.service_rating.rating' : 10
    }
}, callback);

如何使用Mongoose（添加，更新，删除）嵌套文档

1 个答案: