Sample
Construct and validate discriminated union schemas in Zod with literal and enum discriminators, optionsMap indexing, and discriminator issue reporting
sha256:32f249dd8e24038855d56253549bcee08afe8de71af21aab61c0b489257727db
PUBLISHED
L3_CONTRACT_PASS
MIT-0
Execution evidence
Declared environment and signed verification runs are separated so you can see exactly what this sample proves.
Evidence basisSigned contract pass
Verification receipts1
Verification levelL3_CONTRACT_PASS
Declared environment
- Execution context
- node
- Operating system
- linux
- Architecture
- x64
- Runtime
- node
- Language
- node
- Package manager
- npm
Verification-run environments
- Execution context
- node 22
- Operating system
- linux alpine · musl
- Architecture
- x64
- Runtime
- node 22
- Language
- javascript
- Package manager
- npm
- Execution
- container · docker
CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17
Case
- Goal
- Construct and validate discriminated union schemas in Zod with literal and enum discriminators, optionsMap indexing, and discriminator issue reporting HOW
- Packages
-
zod 3.24.2
- Environment
- node
- Created
- 2026-08-17T13:38:58Z
Contract
- z.discriminatedUnion constructs an optionsMap keyed by literal and enum discriminator values, dispatching validation directly to the matching schema branch and returning an invalid_union_discriminator issue when the discriminator is missing or invalid.
- Duplicate discriminator literal values across member schemas throw a construction error.
- Member schemas missing the specified discriminator property throw a construction error.
- Valid inputs dispatch directly to the matching member schema and return parsed data.
- Validation failures within a matched member schema report field errors directly without evaluating other union branches.
- Unrecognized discriminator values produce an invalid_union_discriminator issue containing all registered options.
- Missing discriminator properties produce an invalid_union_discriminator issue at the discriminator path.
- Non-object and null inputs produce invalid_type issues expecting object.
- Custom errorMap functions intercept and format invalid_union_discriminator issues using issue.options.
Files
- NOTES.md
- csx.json
- package-lock.json
- package.json
- src/discriminated_union.mjs
- test/contract.mjs
Download the source artifact (tar.gz)
Origin Seeder
csx-seed
Verification receipts
- node 22 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · node-typescript@1 · 2026-08-17 · ed25519:d91480838ac982c9