Improve ZodErrorFilter to only return first union error

[iamacook]

Summary

This extends the ZodErrorFilter to reduce the number of issues returned in the error payload when a invalid_union error is thrown by zod.

Instead of the error having multiple elements, e.g.:

  statusCode: 422,
  code: 'invalid_union',
  unionErrors: [
    { issues: [Array], name: 'ZodError' },
    { issues: [Array], name: 'ZodError' }
  ],
  path: [],
  message: 'Invalid input'
}

it returns the first issue of the unionErrors:

{
  statusCode: 422,
  code: 'invalid_type',
  expected: 'string',
  received: 'boolean',
  path: ['value'],
  message: 'Expected string, received boolean',
}

Motivation

We only return the first issue of a "standard" ZodError, removing any identifier that it is a ZodError, to reduce the error payload. This mirrors that with invalid_union errors.

Changes

• Create ZodErrorFiler['mapZodErrorResponse'] to extract issues according to type
• Add test coverage

[coveralls]

Pull Request Test Coverage Report for Build 8170650706

Details

• 3 of 3 (100.0%) changed or added relevant lines in 1 file are covered.
• 3 unchanged lines in 2 files lost coverage.
• Overall coverage decreased (-0.08%) to 93.117%

---

Files with Coverage Reduction	New Missed Lines	%
src/routes/transactions/mappers/common/transaction-info.mapper.ts	1	78.17%
src/routes/transactions/entities/tests/human-description.builder.ts	2	80.0%

Totals
Change from base Build 8169973314:	-0.08%
Covered Lines:	6406
Relevant Lines:	6635

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💛 - Coveralls