baserepositry

apps/api/src/modules/content/repositories/post.repository.ts

@@ -1,22 +1,25 @@
-import { Repository } from 'typeorm';
+import { BaseRepository } from '@/modules/database/base/repository';
-
 import { CustomRepository } from '@/modules/database/decorators/repository.decorator';
 
 import { CommentEntity } from '../entities';
 import { PostEntity } from '../entities/post.entity';
 
 @CustomRepository(PostEntity)
-export class PostRepository extends Repository<PostEntity> {
+export class PostRepository extends BaseRepository<PostEntity> {
-    buildBaseQB() {
+    protected _qbName = 'post';
-        return this.createQueryBuilder('post')
+
-            .leftJoinAndSelect('post.category', 'category')
+    protected orderBy = 'createdAt';
-            .leftJoinAndSelect('post.tags', 'tags')
+
+    postBuildBaseQB() {
+        return this.buildBaseQB()
+            .leftJoinAndSelect(`${this.qbName}.category`, 'category')
+            .leftJoinAndSelect(`${this.qbName}.tags`, 'tags')
             .addSelect((subQuery) => {
                 return subQuery
                     .select('COUNT(c.id)', 'count')
                     .from(CommentEntity, 'c')
-                    .where('c.post.id = post.id');
+                    .where(`c.post.id = ${this.qbName}.tags`);
             }, 'commentCount')
-            .loadRelationCountAndMap('post.commentCount', 'post.comments');
+            .loadRelationCountAndMap(`${this.qbName}.commentCount`, `${this.qbName}.commentCount`);
     }
 }

apps/api/src/modules/content/repositories/tag.repository.ts

@@ -1,19 +1,22 @@
-import { Repository } from 'typeorm';
+import { BaseRepository } from '@/modules/database/base/repository';
-
 import { CustomRepository } from '@/modules/database/decorators/repository.decorator';
 
 import { TagEntity, PostEntity } from '../entities';
 
 @CustomRepository(TagEntity)
-export class TagRepository extends Repository<TagEntity> {
+export class TagRepository extends BaseRepository<TagEntity> {
-    buildBaseQB() {
+    protected _qbName = 'tag';
-        return this.createQueryBuilder('tag')
+
-            .leftJoinAndSelect('tag.posts', 'posts')
+    protected orderBy = 'name';
+
+    tagbuildBaseQB() {
+        return this.buildBaseQB()
+            .leftJoinAndSelect(`${this.qbName}.posts`, 'posts')
             .addSelect(
                 (subQuery) => subQuery.select('COUNT(p.id)', 'count').from(PostEntity, 'p'),
                 'postCount',
             )
             .orderBy('postCount', 'DESC')
-            .loadRelationCountAndMap('tag.postCount', 'tag.posts');
+            .loadRelationCountAndMap(`${this.qbName}.postCount`, `${this.qbName}.posts`);
     }
 }

apps/api/src/modules/database/base/repository.ts

@@ -0,0 +1,23 @@
+import { ObjectLiteral, Repository, SelectQueryBuilder } from 'typeorm';
+
+import { getOrderBy } from '../helpers';
+import { OrderQueryType } from '../types';
+
+export abstract class BaseRepository<E extends ObjectLiteral> extends Repository<E> {
+    protected abstract _qbName: string;
+
+    protected abstract orderBy?: OrderQueryType;
+
+    get qbName(): string {
+        return this._qbName;
+    }
+
+    buildBaseQB() {
+        return this.createQueryBuilder(this.qbName);
+    }
+
+    addOrderBy(qb: SelectQueryBuilder<E>, orderby?: OrderQueryType) {
+        const orderBy = orderby ?? this.orderBy;
+        return getOrderBy(qb, this.qbName, orderBy);
+    }
+}

apps/api/src/modules/database/base/service.ts

@@ -0,0 +1,155 @@
+import { ForbiddenException, NotFoundException } from '@nestjs/common';
+import { isNil } from 'lodash';
+import { In, ObjectLiteral, SelectQueryBuilder } from 'typeorm';
+
+import { SelectTrashMode } from '@/modules/content/constants';
+
+import { TreeChildrenResolve } from '../constants';
+import { paginate, treePaginate } from '../helpers';
+import { PaginateOptions, PaginateReturn, QueryHook, ServiceListQueryOption } from '../types';
+
+import { BaseRepository } from './repository';
+import { BaseTreeRepository } from './tree.repository';
+
+export abstract class BaseService<
+    E extends ObjectLiteral,
+    R extends BaseRepository<E> | BaseTreeRepository<E>,
+    P extends ServiceListQueryOption<E> = ServiceListQueryOption<E>,
+> {
+    protected repository: R;
+
+    protected enableTrash = false;
+
+    constructor(repository: R) {
+        this.repository = repository;
+        if (
+            !(this.repository instanceof BaseTreeRepository) &&
+            !(this.repository instanceof BaseRepository)
+        ) {
+            throw new Error(
+                'Repository must instance of BaseRepository or BaseTreeRepository in DataService!',
+            );
+        }
+    }
+
+    protected async buildItemQB(id: string, qb: SelectQueryBuilder<E>, callback?: QueryHook<E>) {
+        qb.where(`${this.repository.qbName}.id = :id`, { id });
+        if (callback) return callback(qb);
+        // 短路运算符,不会阻塞后续代码执行 如果callback执行
+        // callback && callback(qb);
+        return qb;
+    }
+
+    protected async buildListQB(qb: SelectQueryBuilder<E>, options: P, callback?: QueryHook<E>) {
+        const { trashed } = options ?? {};
+        if (
+            this.enableTrash &&
+            (trashed === SelectTrashMode.ALL || trashed === SelectTrashMode.ONLY)
+        ) {
+            qb.withDeleted();
+            if (trashed === SelectTrashMode.ONLY) {
+                qb.where(`${this.repository.qbName}.deletedAt IS NOT NULL`);
+            }
+        }
+        return callback ? callback(qb) : qb;
+    }
+
+    async list(options?: P, callback?: QueryHook<E>): Promise<E[]> {
+        if (this.repository instanceof BaseRepository) {
+            const qb = await this.buildListQB(this.repository.buildBaseQB(), options, callback);
+            return qb.getMany();
+        }
+        const { trashed = SelectTrashMode.NONE } = options ?? {};
+        const tree = await this.repository.findTrees({
+            ...options,
+            withTrashed:
+                this.enableTrash &&
+                (trashed === SelectTrashMode.ALL || trashed === SelectTrashMode.ONLY),
+            onlyTrashed: this.enableTrash && trashed === SelectTrashMode.ONLY,
+        });
+        return this.repository.toFlatTrees(tree);
+    }
+
+    async basePaginate(
+        options?: PaginateOptions & P,
+        callback?: QueryHook<E>,
+    ): Promise<PaginateReturn<E>> {
+        const queryOptions = options ?? {};
+        if (this.repository instanceof BaseRepository) {
+            const qb = await this.buildListQB(this.repository.buildBaseQB(), options, callback);
+            return paginate(qb, queryOptions);
+        }
+        const data = await this.list(options, callback);
+        return treePaginate(queryOptions, data);
+    }
+
+    async detail(id: string, callback?: QueryHook<E>): Promise<E> {
+        const qb = await this.buildItemQB(id, this.repository.buildBaseQB(), callback);
+
+        const item = qb.getOne();
+        if (!item) {
+            throw new NotFoundException(`${this.repository.qbName} ${id} not exists!`);
+        }
+        return item;
+    }
+
+    // 首先判断是否是树形结构，如果是树形结构，那么就会调用findDescendantsTree方法，否则直接调用find方法
+    async delete(ids: string[], trash?: boolean) {
+        let items: E[] = [];
+        if (this.repository instanceof BaseTreeRepository) {
+            items = await this.repository.find({
+                where: { id: In(ids) as any },
+                withDeleted: this.enableTrash ? true : undefined,
+                relations: ['parent', 'children'],
+            });
+            if (this.repository.childrenResolve === TreeChildrenResolve.UP) {
+                for (const item of items) {
+                    if (isNil(item.children) || item.children.length <= 0) continue;
+                    const nchildren = [...item.children].map((c) => {
+                        c.parent = item.parent;
+                        return item;
+                    });
+                    await this.repository.save(nchildren);
+                }
+            }
+        } else {
+            items = await this.repository.find({
+                where: { id: In(ids) as any },
+                withDeleted: this.enableTrash ? true : undefined,
+            });
+        }
+        if (this.enableTrash && trash) {
+            const directs = items.filter((item) => !isNil(item.deletedAt));
+            const softs = items.filter((item) => isNil(item.deletedAt));
+            return [
+                ...(await this.repository.remove(directs)),
+                ...(await this.repository.softRemove(softs)),
+            ];
+        }
+        return this.repository.remove(items);
+    }
+
+    async restore(ids: string[]) {
+        const qb = this.repository.buildBaseQB();
+        if (!this.enableTrash) {
+            throw new ForbiddenException(
+                `Can't to restore ${this.repository.qbName} because Trash is not enabled!`,
+            );
+        }
+        const items = await qb.withDeleted().whereInIds(ids).getMany();
+        const trashedIds = items.map((item) => item.id);
+        if (trashedIds.length > 0) {
+            this.repository.restore(trashedIds);
+            return qb.whereInIds(trashedIds).getMany();
+        }
+        return [];
+    }
+
+    create(data: any, ...others: any[]): Promise<E> {
+        throw new ForbiddenException(`Can not to create ${this.repository.qbName}!`);
+    }
+
+    update(data: any, ...others: any[]): Promise<E> {
+        throw new ForbiddenException(`Can not to update ${this.repository.qbName}!`);
+    }
+}

apps/api/src/modules/database/base/tree.repository.ts

@@ -0,0 +1,101 @@
+import { pick, unset } from 'lodash';
+import {
+    EntityManager,
+    EntityTarget,
+    FindOptionsUtils,
+    FindTreeOptions,
+    ObjectLiteral,
+    QueryRunner,
+    SelectQueryBuilder,
+    TreeRepository,
+    TreeRepositoryUtils,
+} from 'typeorm';
+
+import { TreeChildrenResolve } from '../constants';
+import { getOrderBy } from '../helpers';
+import { OrderQueryType, QueryParams } from '../types';
+
+export abstract class BaseTreeRepository<E extends ObjectLiteral> extends TreeRepository<E> {
+    protected _qbName = 'treeEntity';
+
+    protected _childrenResolve?: TreeChildrenResolve;
+
+    protected orderBy?: OrderQueryType;
+
+    // eslint-disable-next-line @typescript-eslint/no-useless-constructor
+    constructor(target: EntityTarget<E>, manager: EntityManager, queryRunner?: QueryRunner) {
+        super(target, manager, queryRunner);
+    }
+
+    get qbName(): string {
+        return this._qbName;
+    }
+
+    get childrenResolve() {
+        return this._childrenResolve;
+    }
+
+    buildBaseQB(qb?: SelectQueryBuilder<E>): SelectQueryBuilder<E> {
+        const queryBuilder = qb || this.createQueryBuilder(this.qbName);
+        return queryBuilder.leftJoinAndSelect(`${this.qbName}.parent`, 'parent');
+    }
+
+    addOrderByQuery(qb: SelectQueryBuilder<E>, orderBy: OrderQueryType): SelectQueryBuilder<E> {
+        const ob = orderBy ?? this.orderBy;
+        return getOrderBy(qb, this.qbName, ob);
+    }
+
+    async findDescendantsTree(entity: E, options?: FindTreeOptions & QueryParams<E>) {
+        const { addQuery, onlyTrashed, orderBy, withTrashed } = options ?? {};
+        const qb = this.buildBaseQB(
+            this.createDescendantsQueryBuilder(this.qbName, 'treeClosure', entity),
+        );
+        addQuery
+            ? await addQuery(this.addOrderByQuery(qb, orderBy))
+            : this.addOrderByQuery(qb, orderBy);
+        withTrashed
+            ? qb.withDeleted()
+            : onlyTrashed && qb.where(`${this.qbName}.deletedAt IS NOT NULL`);
+        FindOptionsUtils.applyOptionsToTreeQueryBuilder(qb, pick(options, ['relations', 'depth']));
+        const entites = await qb.getRawAndEntities();
+        const relationMaps = TreeRepositoryUtils.createRelationMaps(
+            this.manager,
+            this.metadata,
+            this.qbName,
+            entites.raw,
+        );
+        TreeRepositoryUtils.buildChildrenEntityTree(
+            this.metadata,
+            entity,
+            entites.entities,
+            relationMaps,
+            {
+                depth: -1,
+                ...pick(options, ['relations']),
+            },
+        );
+
+        return entity;
+    }
+
+    async findTrees(options?: FindTreeOptions & QueryParams<E>) {
+        const roots = await this.findRoots(options);
+        // foreach 不会等待异步操作，所以这里使用 Promise.all 来等待所有异步操作完成
+        // roots.forEach(async (root) => this.findDescendantsTree(root, options));
+        Promise.all(roots.map((root) => this.findDescendantsTree(root, options)));
+        return roots;
+    }
+
+    async toFlatTrees(trees: E[], depth = 0, parent: E | null = null): Promise<E[]> {
+        const data: Omit<E, 'children'>[] = [];
+        for (const item of trees) {
+            (item as any).depth = depth;
+            (item as any).parent = parent;
+            const { children } = item;
+            unset(item, 'children');
+            data.push(item);
+            data.push(...(await this.toFlatTrees(children, depth + 1, item)));
+        }
+        return data as E[];
+    }
+}

apps/api/src/modules/database/constants.ts

@@ -1 +1,16 @@
 export const CUSTOM_REPOSITORY_METADATA = 'CUSTOM_REPOSITORY_METADATA';
+/**
+ * 排序方式
+ */
+export enum OrderType {
+    ASC = 'ASC',
+    DESC = 'DESC',
+}
+/**
+ * 树形模型在删除父级后子级的处理方式
+ */
+export enum TreeChildrenResolve {
+    DELETE = 'delete',
+    UP = 'up',
+    ROOT = 'root',
+}

apps/api/src/modules/database/helpers.ts

@@ -1,6 +1,6 @@
 import { ObjectLiteral, SelectQueryBuilder } from 'typeorm';
 
-import { PaginateOptions, PaginateReturn } from './types';
+import { OrderQueryType, PaginateOptions, PaginateReturn } from './types';
 
 /**
  * 分页函数
@@ -62,3 +62,29 @@ export function treePaginate<E extends ObjectLiteral>(
         },
     };
 }
+
+export function getOrderBy<E extends ObjectLiteral>(
+    qb: SelectQueryBuilder<E>,
+    alians: string,
+    order?: OrderQueryType,
+) {
+    if (!order) {
+        return qb;
+    }
+    if (typeof order === 'string') {
+        return qb.orderBy(`${alians}.${order}`, 'DESC');
+    }
+    if (Array.isArray(order)) {
+        for (const item of order) {
+            if (typeof item === 'string') {
+                return qb.orderBy(`${alians}.${item}`, 'DESC');
+            }
+            if (item.name && item.order) {
+                return qb.orderBy(`${alians}.${item.name}`, item.order);
+            }
+        }
+    } else {
+        return qb.orderBy(`${alians}.${order.name}`, order.order);
+    }
+    return qb;
+}

apps/api/src/modules/database/types.ts

@@ -1,4 +1,8 @@
-import { ObjectLiteral, SelectQueryBuilder } from 'typeorm';
+import { FindTreeOptions, ObjectLiteral, SelectQueryBuilder } from 'typeorm';
+
+import { SelectTrashMode } from '../content/constants';
+
+import { OrderType } from './constants';
 
 export type QueryHook<E> = (qb: SelectQueryBuilder<E>) => Promise<SelectQueryBuilder<E>>;
 /**
@@ -48,3 +52,46 @@ export interface PaginateReturn<E extends ObjectLiteral> {
     meta: PaginateMeta;
     items: E[];
 }
+/**
+ * 排序类型,{字段名称: 排序方法}
+ * 如果多个值则传入数组即可
+ * 排序方法不设置,默认DESC
+ */
+export type OrderQueryType =
+    | string
+    | { name: string; order: `${OrderType}` }
+    | Array<{ name: string; order: `${OrderType}` } | string>;
+
+/**
+ * 数据列表查询类型
+ */
+export interface QueryParams<E extends ObjectLiteral> {
+    addQuery?: QueryHook<E>;
+    orderBy?: OrderQueryType;
+    withTrashed?: boolean;
+    onlyTrashed?: boolean;
+}
+/**
+ * 服务类数据列表查询类型
+ */
+export type ServiceListQueryOption<E extends ObjectLiteral> =
+    | ServiceListQueryOptionWithTrashed<E>
+    | ServiceListQueryOptionNotWithTrashed<E>;
+
+/**
+ * 带有软删除的服务类数据列表查询类型
+ */
+type ServiceListQueryOptionWithTrashed<E extends ObjectLiteral> = Omit<
+    FindTreeOptions & QueryParams<E>,
+    'withTrashed'
+> & {
+    trashed?: `${SelectTrashMode}`;
+} & Record<string, any>;
+
+/**
+ * 不带软删除的服务类数据列表查询类型
+ */
+type ServiceListQueryOptionNotWithTrashed<E extends ObjectLiteral> = Omit<
+    ServiceListQueryOptionWithTrashed<E>,
+    'trashed'
+>;

apps/api/src/test.ts

@@ -0,0 +1,17 @@
+async function test1(obj: any) {
+    return new Promise((resolve) => {
+        setTimeout(
+            (o) => {
+                o.name = '1111';
+                return resolve(o);
+            },
+            1000,
+            obj,
+        );
+    });
+}
+const aa = { name: '2222' };
+
+test1(aa).then((res) => {
+    console.log(res, '2');
+});