如何推送到猫鼬中的数组
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【中文标题】如何推送到猫鼬中的数组【英文标题】:How to push to an array in mongoose 【发布时间】:2016-01-29 19:51:10 【问题描述】:我有这个代码:
router.post('/setsuggestions', function(req, res, next)
if(!req.body.username || !req.body.challengessuggestions)
return res.status(400).json(message: challengessuggestions);
var query = username: req.body.username ;
/*User.findOneAndUpdate(query, challengessuggestions: req.body.challengessuggestions , callback = function(response)
res.json(response);
);*/
/*
User.findOneAndUpdate(
query,
$push: "challengessuggestions": $oid: req.body.challengessuggestions,
callback = function(response)
res.json(response);
);*/
User.findOneAndUpdate(
query,
$push: challengessuggestions: req.body.challengessuggestions,
safe: true, upsert: true,
function(err, model)
res.json(err);
);
);
当我这样邮递员时:
我收到以下错误:
"name": "MongoError", "message": "异常:字段 'challengesuggestions' 必须是一个数组,但属于 OID 类型 文档 _id: ObjectId('56263b910d1a2f1f0077ffae')", "errmsg": “例外:字段 'challengesuggestions' 必须是一个数组,但 文档中的 OID 类型 _id: ObjectId('56263b910d1a2f1f0077ffae')", “代码”:16837,“确定”:0
这是 AppUser 的架构定义:
var UserSchema = new mongoose.Schema(
username: type: String, lowercase: true, unique: true ,
firstname: type: String,
lastname: type: String,
difficulty: type: String,
isstudent: type: Boolean ,
haschildren: type: Boolean,
gender: type: String ,
email: type: String, unique: true,
birthdate: String,
isdoingchallenges: type: Boolean ,
challengescompleted: [ type: ObjectId, ref: 'Challenge' ],
currentchallenge: type: ObjectId, ref: 'Challenge' ,
challengessuggestions: [ type: ObjectId, ref: 'Challenge' ],
hash: String,
salt: String
);
这是挑战的模式定义:
var Challengeschema = new mongoose.Schema(
name: type: String, initial: true, required: true, index: true ,
image: type: Array ,
difficulty: type: String ,
studentfriendly: type: Boolean ,
childfriendly: type: Boolean ,
description: type: String
);
我在调用 api 的函数中发送这个:
对象_id:“5631423f8c5ba50300f2b4f6”,难度:“中等”,名称: “Probeer 1 van onze recepten.”,__v:0,childfriendly: true…
这给了我以下错误:
D:\Stijn\Documenten\EVA-project-Groep-6\Api\node_modules\mongoose\lib\schema\obj ectid.js:134 throw new CastError('ObjectId', value, this.path); ^ 错误 在 MongooseError.CastError (D:\Stijn\Documenten\EVA-project-Groep-6\Api\node _modules\mongoose\lib\error\cast.js:18:16) 在 ObjectId.cast (D:\Stijn\Documenten\EVA-project-Groep-6\Api\node_modules\m ongoose\lib\schema\objectid.js:134:13) 在 Array.MongooseArray.mixin._cast (D:\Stijn\Documenten\EVA-project-Groep-6\ Api\node_modules\mongoose\lib\types\array.js:124:32) 在 Array.MongooseArray.mixin._mapCast (D:\Stijn\Documenten\EVA-project-Groep -6\Api\node_modules\mongoose\lib\types\array.js:295:17) 在 Object.map (本机) 在 Array.MongooseArray.mixin.push (D:\Stijn\Documenten\EVA-project-Groep-6\A pi\node_modules\mongoose\lib\types\array.js:308:25) 在查询。 (D:\Stijn\Documenten\EVA-project-Groep-6\Api\routes\ind ex.js:144:44) 在 D:\Stijn\Documenten\EVA-project-Groep-6\Api\node_modules\mongoose\node_mo dules\kareem\index.js:177:19 在 D:\Stijn\Documenten\EVA-project-Groep-6\Api\node_modules\mongoose\node_mo dules\kareem\index.js:109:16 在 doNTCallback0 (node.js:408:9) 在 process._tickCallback (node.js:337:13) 10 月 29 日 22:05:38 - [nodemon] 应用程序崩溃 - 在启动之前等待文件更改...
我该如何解决这个问题?
【问题讨论】:
你能告诉我们架构定义吗? 【参考方案1】:首先使用 findOne()
查询用户用户,然后使用传递给回调的第一个找到的文档来保存嵌入的文档:
router.post('/setsuggestions', function(req, res, next)
if(!req.body.username || !req.body.challengessuggestions)
return res.status(400).json(message: challengessuggestions);
var query = username: req.body.username ;
User.findOne(query, function (err, user)
if (err) //throw ...
if (user)
if (user.challengessuggestions && user.challengessuggestions.length)
user.challengessuggestions.push(req.body.challengessuggestions);
else
user.challengessuggestions = [req.body.challengessuggestions];
// save changes
user.save(function (err)
if (!err)
// done ...
);
);
);
【讨论】:
我应该如何在邮递员中测试这个?使用 ObjectId("56313a951a99710300d9d13f") 作为挑战建议不起作用 您可以将日志记录 (console.log()
) 放在逻辑中以查看返回的内容。以上是关于如何推送到猫鼬中的数组的主要内容,如果未能解决你的问题,请参考以下文章