typescript - 类型 'findAncestors' 上不存在属性 'Repository '

Question

您好，我的 typeorm 代码有问题。

我按照这里的示例进行操作:https://github.com/typeorm/typeorm/blob/master/docs/tree-entities.md#materialized-path-aka-path-enumeration .

所以我的实体看起来像:

import {
    Entity,
    PrimaryGeneratedColumn,
    Column,
    CreateDateColumn,
    UpdateDateColumn,
    Tree,
    TreeChildren,
    TreeParent,
} from 'typeorm';

@Entity()
@Tree('materialized-path')
export class Category {

    @PrimaryGeneratedColumn()
    id: number;

    @Column()
    name: string;

    @TreeChildren()
    children: Category[];

    @TreeParent()
    parent: Category;

    @CreateDateColumn({
        type: 'timestamp',
        default: () => 'CURRENT_TIMESTAMP(6)',
    })
    public createdAt: Date;

    @UpdateDateColumn({
        type: 'timestamp',
        default: () => 'CURRENT_TIMESTAMP(6)',
        onUpdate: 'CURRENT_TIMESTAMP(6)',
    })
    public updatedAt: Date;
}

在名为“CategoryController”的 Controller 中，我想获取整个树，但出现“findAncestors”不存在的错误。

import {  getRepository } from 'typeorm';
import {Category} from "../entity/Categories";

export class CategoryController {
    private categoryRepository = getRepository(Category);

    async getCategoryTreeBySingleCategory(category:Category|string){
        {...}
        return await this.categoryRepository.findAncestors(category); // <--- Property 'findAncestors' does not exist on type 'Repository '.
    }
}

有人知道原因并可以帮助我吗？

提前致谢!

Answer 1

成员函数findAncestors仅在类型TreeRepository上定义，您可以使用getTreeRepository而不是getRepository获得该类型.

所以写

import {  getRepository } from 'typeorm';
import {Category} from "../entity/Categories";

export class CategoryController {
    private categoryRepository = getTreeRepository(Category);

    async getCategoryTreeBySingleCategory(category:Category|string){
        {...}
        return await this.categoryRepository.findAncestors(category);
    }
}