Question

我是nodejs和mongoose的新手。有mongoose架构声明的问题。

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]});

JSON我想保存：

{"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"}
                   ]
        ]
}

整个计划：

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");
});

ERROR：

/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Google搜索并找不到任何有助于我理解我的代码错误的内容。

提前致谢!!!

Answer 1

要将数据作为JSON字符串提供给new routes(...)，您必须首先解析它：

var allroutes = new routes(JSON.parse('{"mode": []}'));

routes()实现的Model constructor期望JavaScript Object的参数而不是JSON字符串。

<强>参数：


doc＆lt; Object＆gt;用于创建文档的值

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从中获取了一些语法）：

var allroutes = new routes({"mode": []});

Answer 2

我创建了这个代码（你的一个淡化版本），并且可以使用：node test.js

调用它

test.js

#!/bin/env node
var mongoose = require('mongoose');
var Schema = mongoose.Schema;
mongoose.connect('mongodb://localhost/test');
var smode = new Schema({ name: String });
var routes = mongoose.model('route', smode);
var allroutes = new routes({ name: 'My first route' });
allroutes.save(function (err) {
  if (err) return handleError(err);
  routes.findById(allroutes, function (err, doc) {
    if (err) return handleError(err);
    console.log(doc);
  })
})

您可以尝试一步一步地将其重新构建回原来的版本，或者至少验证您的语法。请注意，在该行＆＃34; var allroutes ...＆＃34;例如，单词名称不包含引号。

无法通过声明的mongoosejs架构保存JSON

2 个答案: