我正在创建猫鼬架构，但我得到了
MongooseError这是我的方案：
let RestaurantSchema = new Schema({
ratings: {
type: [{
id: Number,
value: Number,
_id: false
}],
default: [
{ id: 1, value: 0 },
{ id: 2, value: 0 },
{ id: 3, value: 0 },
{ id: 4, value: 0 },
{ id: 5, value: 0 }
]
},
menu: [{
ratings: {
type: [{
id: Number,
value: Number,
_id: false
}],
default: [
{ id: 1, value: 0 },
{ id: 2, value: 0 },
{ id: 3, value: 0 },
{ id: 4, value: 0 },
{ id: 5, value: 0 }
]
}
}]
})
这是我收到的错误：
/var/app/node_modules/mongoose/lib/schema/documentarray.js:322
throw new CastError('embedded', valueInErrorMessage,
^
MongooseError: Cast to embedded failed for value "{ id: 5, value: 0 }" at path "rating"
at CastError (/var/app/node_modules/mongoose/lib/error/cast.js:26:11)
at DocumentArray.cast (/var/app/node_modules/mongoose/lib/schema/documentarray.js:322:19)
at DocumentArray.SchemaType.getDefault (/var/app/node_modules/mongoose/lib/schematype.js:616:23)
at EmbeddedDocument.Document.$__buildDoc (/var/app/node_modules/mongoose/lib/document.js:265:22)
at EmbeddedDocument.Document (/var/app/node_modules/mongoose/lib/document.js:61:20)
at EmbeddedDocument [as constructor] (/var/app/node_modules/mongoose/lib/types/embedded.js:31:12)
at new EmbeddedDocument (/var/app/node_modules/mongoose/lib/schema/documentarray.js:70:17)
at DocumentArray.SchemaArray [as constructor] (/var/app/node_modules/mongoose/lib/schema/array.js:67:21)
at new DocumentArray (/var/app/node_modules/mongoose/lib/schema/documentarray.js:31:13)
at Function.Schema.interpretAsType (/var/app/node_modules/mongoose/lib/schema.js:643:16)
at Schema.path (/var/app/node_modules/mongoose/lib/schema.js:563:29)
at Schema.add (/var/app/node_modules/mongoose/lib/schema.js:445:12)
at new Schema (/var/app/node_modules/mongoose/lib/schema.js:99:10)
at Object.<anonymous> (/var/app/models/restaurant.js:12:24)
at Module._compile (module.js:571:32)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)
at Module.require (module.js:498:17)
at require (internal/module.js:20:19)
at Object.<anonymous> (/var/app/controllers/restaurant.js:6:18)
at Module._compile (module.js:571:32)
at Object.Module._extensions..js (module.js:580:10)
at Module.load (module.js:488:32)
at tryModuleLoad (module.js:447:12)
at Function.Module._load (module.js:439:3)
at Module.require (module.js:498:17)
我做错了什么？
不一定与上述情况相关，但出现此错误的情况（正如我所发生的那样）是当架构需要一个对象，但代码尝试保存到数组时。即，如果：
var MySubSchema = new Schema(
{
type: String,
meta: String
}
)
var MySchema = new Schema(
subSchema: MySubSchema,
otherSubSchema: OtherSubSchema
)
但是保存数据的路由/控制器如下：
var mySchemaObj = new MySchema(
{mySubSchema: [new MySubSchema( //<-- Shouldn't have array "[" here
{
type: "foo",
meta: "bar"
}
)]
}
)
. . .
. . .
mySchemaObj.save() . . . // <-- This will throw the "Cast to Embedded Failed" error, because MySchema expects a single MySubSchema Object, but the code above instantiates MySubSchema in an array.
这可能已经晚了，但是对于其他面临与我相同问题的人来说。
假设我有一个类似这样的模式
const sampleSchema = new Schema({
productId: Number
productName: String
})
而且，这是我想存储在其中的数据。
{
productId:"product_1000",
productName: "sampleProduct"
}
现在，当我尝试将数据存储在其中时，我将收到 CastError：转换为嵌入值失败。
你明白我犯的错误了吗？让我详细说明一下，在架构中，productId是一个Number，我尝试store的数据是String。为了实现这一点，我们必须将 ProductId 的类型从 Number 更改为 String。
因此，如果您收到 cast error，请再次检查架构。这是一个简单的错误，但我花了很多时间来找出问题所在。
这似乎是v4.9.4中
mongoosetype{id: Number,value: Number,_id: false}TypeError: this.__parentArray._markModified is not a function
at EmbeddedDocument.markModified (/home/user/Desktop/node_modules/mongoose/lib/types/embedded.js:87:24)
at SingleNested.Subdocument.markModified (/home/user/Desktop/node_modules/mongoose/lib/types/subdocument.js:62:18)
at SingleNested.Document.$__set (/home/user/Desktop/node_modules/mongoose/lib/document.js:874:10)
这是此处引用的错误。它似乎已经被修复了几次，但又重新出现了。我在here打开了一个关于此问题的新问题。
解决方法与此处所述相同，替换为
node_modules/mongoose/lib/types/embedded.jsEmbeddedDocument.prototype.markModified = function(path) {
this.$__.activePaths.modify(path);
if (!this.__parentArray) {
return;
}
与
EmbeddedDocument.prototype.markModified = function(path) {
this.$__.activePaths.modify(path);
if (!this.__parentArray || !this.__parentArray._markModified) {
return;
}
此外，将模型重新建模为不同的模式有助于调试问题：
let RatingsItemSchema = new mongoose.Schema({
id: Number,
value: Number,
_id: false
});
let RatingsItem = db.model('RatingsItem', RatingsItemSchema);
let RatingsSchema = new mongoose.Schema({
ratings: {
type: [RatingsItemSchema],
default: [
{ id: 1, value: 0 },
{ id: 2, value: 0 },
{ id: 3, value: 0 },
{ id: 4, value: 0 },
{ id: 5, value: 0 }
]
},
_id: false
});
let RestaurantSchema = new mongoose.Schema({
ratings: {
type: [RatingsItemSchema],
default: [
{ id: 1, value: 0 },
{ id: 2, value: 0 },
{ id: 3, value: 0 },
{ id: 4, value: 0 },
{ id: 5, value: 0 }
]
},
menu: {
type: [RatingsSchema]
}
});
let Ratings = db.model('Ratings', RatingsSchema);
let Restaurant = db.model('Restaurant', RestaurantSchema);
let rest = new Restaurant();
rest.menu.push(new Ratings());
console.log(JSON.stringify(rest, null, 2));
在我的例子中，req.body与预定义的猫鼬模式不匹配，我试图保存一个ObjectId数组， 请求主体是：
{
cart: ["60d9b457a6c11f2a3818051a"]
}
但是猫鼬模式是
cart: [
{
product: {
type: mongoose.Schema.Types.ObjectId,
ref: 'products'
}
}
]
我像这样改变了猫鼬模式以使其工作：
cart: [
{
type: mongoose.Schema.Types.ObjectId,
ref: 'products'
}
]
如果其他人也有和我一样的问题： 当我在 React 项目中使用 uuidv4() 设置对象
_id_id（部分例外）
path: 'middleComponents',
reason: CastError: Cast to ObjectId failed for value "f41b7983-09b8-4463-bf5b-e59a8f7a19f6" (type string) at path "_id"
at ObjectId.cast (E:\path-to-project\node_modules\mongoose\lib\schema\objectid.js:248:11)
at ObjectId.SchemaType.applySetters (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1123:12)
at EmbeddedDocument.$set (E:\path-to-project\node_modules\mongoose\lib\document.js:1309:20)
at EmbeddedDocument.$set (E:\path-to-project\node_modules\mongoose\lib\document.js:1058:16)
at EmbeddedDocument.Document (E:\path-to-project\node_modules\mongoose\lib\document.js:148:12)
at EmbeddedDocument [as constructor] (E:\path-to-project\node_modules\mongoose\lib\types\embedded.js:47:12)
at new EmbeddedDocument (E:\path-to-project\node_modules\mongoose\lib\schema\documentarray.js:116:17)
at DocumentArrayPath.cast (E:\path-to-project\node_modules\mongoose\lib\schema\documentarray.js:462:22)
at DocumentArrayPath.SchemaType.applySetters (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1123:12)
at DocumentArrayPath.SchemaType._castForQuery (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1601:15)
at DocumentArrayPath.SchemaType.castForQueryWrapper (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1563:22)
at castUpdateVal (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:546:19)
at walkUpdatePath (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:366:24)
at castUpdate (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:96:7)
at model.Query._castUpdate (E:\path-to-project\node_modules\mongoose\lib\query.js:4721:10)
at castDoc (E:\path-to-project\node_modules\mongoose\lib\query.js:4751:18) {
stringValue: '"f41b7983-09b8-4463-bf5b-e59a8f7a19f6"',
messageFormat: undefined,
kind: 'ObjectId',
value: 'f41b7983-09b8-4463-bf5b-e59a8f7a19f6',
path: '_id',
reason: Error: Argument passed in must be a single String of 12 bytes or a string of 24 hex characters
at new ObjectID (E:\path-to-project\node_modules\bson\lib\bson\objectid.js:59:11)
at castObjectId (E:\path-to-project\node_modules\mongoose\lib\cast\objectid.js:25:12)
at ObjectId.cast (E:\path-to-project\node_modules\mongoose\lib\schema\objectid.js:246:12)
at ObjectId.SchemaType.applySetters (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1123:12)
at EmbeddedDocument.$set (E:\path-to-project\node_modules\mongoose\lib\document.js:1309:20)
at EmbeddedDocument.$set (E:\path-to-project\node_modules\mongoose\lib\document.js:1058:16)
at EmbeddedDocument.Document (E:\path-to-project\node_modules\mongoose\lib\document.js:148:12)
at EmbeddedDocument [as constructor] (E:\path-to-project\node_modules\mongoose\lib\types\embedded.js:47:12)
at new EmbeddedDocument (E:\path-to-project\node_modules\mongoose\lib\schema\documentarray.js:116:17)
at DocumentArrayPath.cast (E:\path-to-project\node_modules\mongoose\lib\schema\documentarray.js:462:22)
at DocumentArrayPath.SchemaType.applySetters (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1123:12)
at DocumentArrayPath.SchemaType._castForQuery (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1601:15)
at DocumentArrayPath.SchemaType.castForQueryWrapper (E:\path-to-project\node_modules\mongoose\lib\schematype.js:1563:22)
at castUpdateVal (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:546:19)
at walkUpdatePath (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:366:24)
at castUpdate (E:\path-to-project\node_modules\mongoose\lib\helpers\query\castUpdate.js:96:7),
valueType: 'string'
},
valueType: 'string'
对于无法解决问题的人，请检查您是否使用包含字符串化字段的对象更新数据：
return await Realty.findByIdAndUpdate(
id,
{
...realty,
$push: { images: { $each: images } },
},
{ new: true },
);
imagesrealty.imagesrealty