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Multer error fieldname #13407

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Multer error fieldname #13407

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50e1d70
feat(platform-express): multer errors show 'field'
MegaSpaceHamlet Mar 31, 2024
ef12d35
refactor(platform-express): modify error arg type
MegaSpaceHamlet Apr 8, 2024
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9 changes: 8 additions & 1 deletion packages/platform-express/multer/multer/multer.utils.ts
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Expand Up @@ -5,7 +5,11 @@ import {
} from '@nestjs/common';
import { multerExceptions, busboyExceptions } from './multer.constants';

export function transformException(error: Error | undefined) {
// Multer may add in a 'field' property to the error
// https://github.com/expressjs/multer/blob/aa42bea6ac7d0cb8fcb279b15a7278cda805dc63/lib/multer-error.js#L19
export function transformException(
error: (Error & { field?: string }) | undefined,
) {
if (!error || error instanceof HttpException) {
return error;
}
Expand All @@ -19,6 +23,9 @@ export function transformException(error: Error | undefined) {
case multerExceptions.LIMIT_UNEXPECTED_FILE:
case multerExceptions.LIMIT_PART_COUNT:
case multerExceptions.MISSING_FIELD_NAME:
if (error.field) {
return new BadRequestException(`${error.message} - ${error.field}`);
}
return new BadRequestException(error.message);
case busboyExceptions.MULTIPART_BOUNDARY_NOT_FOUND:
return new BadRequestException(error.message);
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11 changes: 11 additions & 0 deletions packages/platform-express/test/multer/multer/multer.utils.spec.ts
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Expand Up @@ -57,5 +57,16 @@ describe('transformException', () => {
);
});
});
describe(`and has a 'field' property`, () => {
it('should return the field propery appended to the error message', () => {
const err = {
message: multerExceptions.LIMIT_UNEXPECTED_FILE,
field: 'foo',
};
expect(transformException(err as any).message).to.equal(
`${multerExceptions.LIMIT_UNEXPECTED_FILE} - foo`,
);
});
});
});
});