mongoose 創建索引

mongoose 創建索引

字段級別

  var animalSchema = new Schema({
    name: String,
    type: String,
    tags: { type: [String], index: true } // field level
  });

schema級別

 animalSchema.index({ name: 1, type: -1 }); // schema level

1和-1分別表示升序索引和降序索引