TypeORM：无法读取未定义的 属性 'getParameters'
TypeORM: Cannot read property 'getParameters' of undefined
我正在构建 rest API 使用带有 typeORM 的 express for Mysql 基于 Wordpress 数据库架构，您可以从 here 中检查。
当我尝试 inner join 或 left join 时，我每次都会收到 Cannot read property 'getParameters' of undefined 错误。
我的代码：
const posts = await this.postRepository
.createQueryBuilder('posts')
.innerJoinAndSelect(WpPostMetaModel, 'postmeta', 'posts.id = postmeta.post')
.getMany()
response.send(posts);
我也试过以下同样的错误：
let posts = await createQueryBuilder('WpPostsModel')
.leftJoinAndSelect(WpPostMetaModel, 'postmeta', 'postmeta.post_id = WpPostsModel.ID')
.getManyAndCount()
我的实体：
Post实体：
@Entity({ name: 'wp_posts', synchronize: false })
export class WpPostsModel {
@PrimaryGeneratedColumn({ name: 'ID' })
public id?: number;
@Column({ name: 'post_date' })
public date?: Date;
@Column({ name: 'post_date_gmt' })
public date_gmt?: Date;
...etc
@ManyToMany(() => WpTermTaxonomyModel)
@JoinTable({
name: 'wp_term_relationships',
joinColumn: {
name: 'object_id',
referencedColumnName: 'ID'
},
inverseJoinColumn: {
name: 'term_taxonomy_id',
referencedColumnName: 'termTaxonomyId'
}
})
public categories?: WpTermTaxonomyModel[];
}
Post 元实体：
@Entity({ name: 'wp_postmeta' })
export class WpPostMetaModel {
@PrimaryGeneratedColumn({ name: 'meta_id' })
public metaId?: number;
@OneToOne(() => WpPostsModel, {eager: true, cascade: true})
@JoinColumn({ name: 'post_id' })
public post?: WpPostsModel
@Column({ name: 'meta_key' })
public metaKey?: string;
@Column({ name: 'meta_value' })
public metaValue?: string;
}
更新：整个错误
(node:1043) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'getParameters' of undefined
at SelectQueryBuilder.join (/Volumes/Partion-2/Projects/republic-news/src/query-builder/SelectQueryBuilder.ts:1319:52)
at SelectQueryBuilder.leftJoin (/Volumes/Partion-2/Projects/republic-news/src/query-builder/SelectQueryBuilder.ts:284:14)
at SelectQueryBuilder.leftJoinAndSelect (/Volumes/Partion-2/Projects/republic-news/src/query-builder/SelectQueryBuilder.ts:364:14)
at WpPostsController.<anonymous> (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:54:14)
at step (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:33:23)
at Object.next (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:14:53)
at /Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:8:71
at new Promise (<anonymous>)
at __awaiter (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:4:12)
at WpPostsController.getAllPosts (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:31:86)
(node:1043) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:1043) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
我不熟悉该库，但查看它的代码可能会在 join 函数的 this.setParameters(subQueryBuilder.getParameters()); 行抛出。要解决这个问题，我会在 Chrome 开发工具（源选项卡最右边的小暂停图标）中启用异常停止并在它抛出时查看，我认为这是因为 WpPostMetaModel 你通过的不符合界面它应该是一个函数（在你的情况下你传递 class - 在 JS 中是相同的） return 正确的数据：
这是源代码中的代码：
let subQuery: string = "";
if (entityOrProperty instanceof Function) {
const subQueryBuilder: SelectQueryBuilder<any> = (entityOrProperty as any)(((this as any) as SelectQueryBuilder<any>).subQuery());
this.setParameters(subQueryBuilder.getParameters()); // I think this line throw error
subQuery = subQueryBuilder.getQuery();
} else {
subQuery = entityOrProperty;
}
你可以尝试在 repo (GitHub issue) 上询问，我想你只是用错了库。
抱歉，这不是正确的答案，但是评论的文字太多了。
我的代码可以正常工作，但我真的不知道为什么？！！ :"D
刚刚删除了我的 post 元实体并重新创建，它运行良好！
但是我对代码做了一些小的改动以左加入 table
const posts = await this.postRepository.createQueryBuilder('post')
.leftJoinAndMapOne('post.meta', WpPostmetaModel, 'postmeta', 'postmeta.post = post.id')
// leftJoinAndMapOne instead of letftJoinAndSelect as leftJoinAndSelect didn't return the joined table
.getMany();
response.send(posts);
我从 github 的一个问题中得到它，不幸的是没有在文档中提及。
就我而言，我在创建连接对象时没有添加实体属性
我认为“无法读取未定义的 属性 'getParameters'”意味着它找不到特定 table（实体 class）的元数据。
Please read the following Stack Overflow answer
我正在构建 rest API 使用带有 typeORM 的 express for Mysql 基于 Wordpress 数据库架构，您可以从 here 中检查。
当我尝试 inner join 或 left join 时，我每次都会收到 Cannot read property 'getParameters' of undefined 错误。
我的代码：
const posts = await this.postRepository
.createQueryBuilder('posts')
.innerJoinAndSelect(WpPostMetaModel, 'postmeta', 'posts.id = postmeta.post')
.getMany()
response.send(posts);
我也试过以下同样的错误：
let posts = await createQueryBuilder('WpPostsModel')
.leftJoinAndSelect(WpPostMetaModel, 'postmeta', 'postmeta.post_id = WpPostsModel.ID')
.getManyAndCount()
我的实体：
Post实体：
@Entity({ name: 'wp_posts', synchronize: false })
export class WpPostsModel {
@PrimaryGeneratedColumn({ name: 'ID' })
public id?: number;
@Column({ name: 'post_date' })
public date?: Date;
@Column({ name: 'post_date_gmt' })
public date_gmt?: Date;
...etc
@ManyToMany(() => WpTermTaxonomyModel)
@JoinTable({
name: 'wp_term_relationships',
joinColumn: {
name: 'object_id',
referencedColumnName: 'ID'
},
inverseJoinColumn: {
name: 'term_taxonomy_id',
referencedColumnName: 'termTaxonomyId'
}
})
public categories?: WpTermTaxonomyModel[];
}
Post 元实体：
@Entity({ name: 'wp_postmeta' })
export class WpPostMetaModel {
@PrimaryGeneratedColumn({ name: 'meta_id' })
public metaId?: number;
@OneToOne(() => WpPostsModel, {eager: true, cascade: true})
@JoinColumn({ name: 'post_id' })
public post?: WpPostsModel
@Column({ name: 'meta_key' })
public metaKey?: string;
@Column({ name: 'meta_value' })
public metaValue?: string;
}
更新：整个错误
(node:1043) UnhandledPromiseRejectionWarning: TypeError: Cannot read property 'getParameters' of undefined
at SelectQueryBuilder.join (/Volumes/Partion-2/Projects/republic-news/src/query-builder/SelectQueryBuilder.ts:1319:52)
at SelectQueryBuilder.leftJoin (/Volumes/Partion-2/Projects/republic-news/src/query-builder/SelectQueryBuilder.ts:284:14)
at SelectQueryBuilder.leftJoinAndSelect (/Volumes/Partion-2/Projects/republic-news/src/query-builder/SelectQueryBuilder.ts:364:14)
at WpPostsController.<anonymous> (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:54:14)
at step (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:33:23)
at Object.next (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:14:53)
at /Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:8:71
at new Promise (<anonymous>)
at __awaiter (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:4:12)
at WpPostsController.getAllPosts (/Volumes/Partion-2/Projects/republic-news/src/controllers/post.controller.ts:31:86)
(node:1043) UnhandledPromiseRejectionWarning: Unhandled promise rejection. This error originated either by throwing inside of an async function without a catch block, or by rejecting a promise which was not handled with .catch(). (rejection id: 1)
(node:1043) [DEP0018] DeprecationWarning: Unhandled promise rejections are deprecated. In the future, promise rejections that are not handled will terminate the Node.js process with a non-zero exit code.
我不熟悉该库，但查看它的代码可能会在 join 函数的 this.setParameters(subQueryBuilder.getParameters()); 行抛出。要解决这个问题，我会在 Chrome 开发工具（源选项卡最右边的小暂停图标）中启用异常停止并在它抛出时查看，我认为这是因为 WpPostMetaModel 你通过的不符合界面它应该是一个函数（在你的情况下你传递 class - 在 JS 中是相同的） return 正确的数据：
这是源代码中的代码：
let subQuery: string = "";
if (entityOrProperty instanceof Function) {
const subQueryBuilder: SelectQueryBuilder<any> = (entityOrProperty as any)(((this as any) as SelectQueryBuilder<any>).subQuery());
this.setParameters(subQueryBuilder.getParameters()); // I think this line throw error
subQuery = subQueryBuilder.getQuery();
} else {
subQuery = entityOrProperty;
}
你可以尝试在 repo (GitHub issue) 上询问，我想你只是用错了库。
抱歉，这不是正确的答案，但是评论的文字太多了。
我的代码可以正常工作，但我真的不知道为什么？！！ :"D
刚刚删除了我的 post 元实体并重新创建，它运行良好！
但是我对代码做了一些小的改动以左加入 table
const posts = await this.postRepository.createQueryBuilder('post')
.leftJoinAndMapOne('post.meta', WpPostmetaModel, 'postmeta', 'postmeta.post = post.id')
// leftJoinAndMapOne instead of letftJoinAndSelect as leftJoinAndSelect didn't return the joined table
.getMany();
response.send(posts);
我从 github 的一个问题中得到它，不幸的是没有在文档中提及。
就我而言，我在创建连接对象时没有添加实体属性
我认为“无法读取未定义的 属性 'getParameters'”意味着它找不到特定 table（实体 class）的元数据。
Please read the following Stack Overflow answer