我是 Nodejs 和 mongoose 的新手。 Mongoose 模式声明有问题。
我声明了一个架构如下:
var srouteDetails = new Schema({route_id:String, route_name:String});
var srouteTypes = new Schema({route_type:String, mode_name:String, route:[srouteDetails]});
var smode = new Schema({mode:[srouteTypes]});
我试图保存的 JSON:
{"mode":
[
"route_type":"4",
"mode_name":"Boat",
"route": [
{"route_id":"Boat-F4","route_name":"Charlestown Ferry"},
{"route_id":"Boat-F1","route_name":"Hingham Ferry"},
{"route_id":"Boat-F3","route_name":"Hull Ferry"}
]
]
}
整个程序:
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
var srouteDetails = new Schema({route_id:String, route_name:String});
var srouteTypes = new Schema({route_type:String, mode_name:String, route:[srouteDetails]});
var smode = new Schema({mode:[srouteTypes]});
mongoose.connect('mongodb://localhost/test');
var routes = mongoose.model('route',smode);
var allroutes = new routes('{"mode": [{"route_type": "4","mode_name": "Boat","route": [{"route_id": "Boat-F4","route_name": "Charlestown Ferry"},{"route_id": "Boat-F1","route_name": "Hingham Ferry"},{"route_id": "Boat-F3","route_name": "Hull Ferry"}]}]}');
allroutes.save(function(err){
if(err) throw err;
console.log("Saved");
});
错误:
/Workspace_Js/jsontest/node_modules/mongoose/lib/document.js:158
if (obj && '_id' in obj) continue;
^
TypeError: Cannot use 'in' operator to search for '_id' in {"mode": [{"route_type": "4","mode_name": "Boat","route": [{"route_id": "Boat-F4","route_name": "Charlestown Ferry"},{"route_id": "Boat-F1","route_name": "Hingham Ferry"},{"route_id": "Boat-F3","route_name": "Hull Ferry"}]}]}
at model.Document.$__buildDoc (/Users/Sravan/Workspace_Js/jsontest/node_modules/mongoose/lib/document.js:158:27)
at model.Document (/Users/Sravan/Workspace_Js/jsontest/node_modules/mongoose/lib/document.js:57:20)
at model.Model (/Users/Sravan/Workspace_Js/jsontest/node_modules/mongoose/lib/model.js:43:12)
at new model (/Users/Sravan/Workspace_Js/jsontest/node_modules/mongoose/lib/model.js:2536:11)
at Object.<anonymous> (/Users/Sravan/Workspace_Js/jsontest/index.js:12:17)
at Module._compile (module.js:456:26)
at Object.Module._extensions..js (module.js:474:10)
at Module.load (module.js:356:32)
at Function.Module._load (module.js:312:12)
at Function.Module.runMain (module.js:497:10)
请让我知道我做错了什么。我用谷歌搜索,找不到任何可以帮助我理解我的代码有什么问题的东西。
提前致谢!!!
最佳答案
要将数据作为 JSON 字符串提供给 new paths(...)
,您必须首先解析它:
var allroutes = new routes(JSON.parse('{"mode": []}'));
Model
constructor ,routes()
实现的参数需要 JavaScript Object
,而不是 JSON 字符串。
<小时/>Parameters:
doc
<Object> values with which to create the document
您还可以从参数中删除周围的引号,以使用 initializers 定义 JavaScript 对象和数组。 (JSON 从中获得了一些语法):
var allroutes = new routes({"mode": []});
关于json - 无法通过声明的 mongoosejs 模式保存 JSON,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29336194/