Mikro ORM + MongoDB + GraphQL 查询嵌入式对象/数组时出错

问题描述

这可能会有点长，但有很多奇怪的问题需要解释。

我在运行查询时收到的错误消息是：

"stacktrace": [
        "SyntaxError: Arg string terminates parameters early","    at new Function (<anonymous>)","    at Function.createFunction (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/utils/Utils.js:611:52)","    at ObjectHydrator.getEntityHydrator (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/hydration/ObjectHydrator.js:221:40)","    at ObjectHydrator.hydrate (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/hydration/ObjectHydrator.js:23:30)","    at EntityFactory.hydrate (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/entity/EntityFactory.js:82:27)","    at EntityFactory.create (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/entity/EntityFactory.js:36:14)","    at MongoEntityManager.find (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/EntityManager.js:100:52)","    at runMicrotasks (<anonymous>)","    at processticksAndRejections (internal/process/task_queues.js:94:5)","    at async EntityLoader.populateMany (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/entity/EntityLoader.js:127:22)","    at async EntityLoader.populateField (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/entity/EntityLoader.js:187:9)","    at async EntityLoader.populate (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/entity/EntityLoader.js:37:13)","    at async MongoEntityManager.lockAndPopulate (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/EntityManager.js:630:9)","    at async MongoEntityManager.findOne (/Users/zacktidwell/repos/services/graphql/node_modules/@mikro-orm/core/EntityManager.js:244:9)","    at async queryName
      ]

我 95% 确定此错误是由我设置的嵌入式对象引起的。下面是一个实体示例：

    export class Properties extends BaseEntity {
        @Embedded({ entity: () => Address,object: true })
        address = new Address();
    
        @property()
        market: string;
  
        @Embedded({
          entity: () => Metadata,array: true,object: true,nullable: true,})
         details: Metadata[] = [];

        @Embedded({
          entity: () => Metadata,})
         features: Metadata[] = [];

         constructor({address,market }) {
           super();
           this.address = address;
           this.market = market;
         }
      }

以及数组的 Embeddable：

@Embeddable()
export class Metadata {
  @property()
  id?: string;

  @property()
  MetaKey?: string;

  @property()
  MetaValue?: string;

  @property()
  createdAt?: string;
}

我正在绞尽脑汁的奇怪事情：

这个错误是不一致的，有时它发生在第一个我查询的关系，有时是第三个，即使它完全相同查询。
这种情况最常发生在人际关系中。如果它是查询中的主要实体，错误很少发生。我可以查询一个实体，它可以正常工作，但是如果我以原始实体作为关系查询其他实体，则不会。
它似乎破坏了其他查询。我可以运行一个查询，它会起作用，然后运行一个不同的查询，它不会。反过来做，同样的事情发生，第一个查询有效，第二个无效。
删除一些嵌入将“修复它”，但哪个并不重要嵌入式。似乎有更多的嵌入对象破坏了它，不一定是任何特定的。（我有十种不同的嵌入，并且一个实体将有多达八个嵌入式可嵌入项和多达五个相同的可嵌入不同的领域）

我尝试了各种不同的方法来编写或初始化嵌入的对象：

   @Embedded({
      entity: () => Metadata,})
      details = new Metadata();

    @Embedded({
      entity: () => Metadata,})
      details?: Metadata;

    @Embedded({
      entity: () => Metadata)
      details?: Metadata[];

   // and varIoUs combinations of {array: true} and {object: true}

感谢您的建议

解决方法

对于遇到此问题的任何人来说，这实际上是 Mikro ORM 方面的问题。正则表达式拼写错误阻止了实体拥有 10 个以上的可嵌入项。它已被修复；如果您遇到此问题，请更新您的软件包。

graphql graphql mikro-orm mongodb mongodb orm orm