tdpeuter/2025SELab2-project-Dwengo
tdpeuter/2025SELab2-project-Dwengo
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fix(backend): Workaround MikroORM syntax error

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This commit is contained in:
Gerald Schmittinger 2025-05-20 15:57:01 +02:00
parent cac944e9c3
commit 2b90f20d45
1 changed files with 15 additions and 2 deletions
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15
backend/src/data/dwengo-entity-repository.ts
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@ -1,12 +1,25 @@
import { EntityRepository, FilterQuery } from '@mikro-orm/core'; import { EntityRepository, FilterQuery, SyntaxErrorException } from '@mikro-orm/core';
import { EntityAlreadyExistsException } from '../exceptions/entity-already-exists-exception.js'; import { EntityAlreadyExistsException } from '../exceptions/entity-already-exists-exception.js';
import { getLogger } from '../logging/initalize.js';
export abstract class DwengoEntityRepository<T extends object> extends EntityRepository<T> { export abstract class DwengoEntityRepository<T extends object> extends EntityRepository<T> {
public async save(entity: T, options?: { preventOverwrite?: boolean }): Promise<void> { public async save(entity: T, options?: { preventOverwrite?: boolean }): Promise<void> {
if (options?.preventOverwrite && (await this.findOne(entity))) { if (options?.preventOverwrite && (await this.findOne(entity))) {
throw new EntityAlreadyExistsException(`A ${this.getEntityName()} with this identifier already exists.`); throw new EntityAlreadyExistsException(`A ${this.getEntityName()} with this identifier already exists.`);
} }
try {
await this.getEntityManager().persistAndFlush(entity); await this.getEntityManager().persistAndFlush(entity);
} catch (e: unknown) {
// Workaround for MikroORM bug: Sometimes, queries are generated with random syntax errors.
// The faulty query is then retried everytime something is persisted. By clearing the entity
// Manager in that case, we make sure that future queries will work.
if (e instanceof SyntaxErrorException) {
getLogger().error("SyntaxErrorException caught => entity manager cleared.");
this.em.clear();
} else {
throw e;
}
}
} }
public async deleteWhere(query: FilterQuery<T>): Promise<void> { public async deleteWhere(query: FilterQuery<T>): Promise<void> {
const toDelete = await this.findOne(query); const toDelete = await this.findOne(query);