When a Schema must forbid a field combination or require at least one array item to match a condition, express it with not and contains, then validate a short sample locally. Use not to block risky combinations such as production plus testMode=true, and contains to require an active admin role or a billing feature entry.
Schema array constraint topic
JSON Schema not / contains array constraint debugging tools
A local workflow for not rules, contains array constraints, production test-mode blocking, role arrays, and pre-release API Schema checks.
JSON Schema notJSON Schema containsarray constraint debuggingcontains array itemnot forbidden field combinationproduction testMode schemaJSON Schema array constraint
Common lookup scenarios
Block production with testMode=true
Confirm a features array is missing billing
Check whether roles include an active admin
Find why contains matched no array item
Review forbidden combinations and array-member rules before release
Recommended workflow
- Format the Schema and JSON sample
- Put forbidden combinations in not and include required fields
- Put array-member requirements in contains
- Run Schema validation and inspect keyword plus instancePath
- Use JSONPath, Pointer, and Deep Diff to confirm array shape changes
Related tool entries
A local workflow for not rules, contains array constraints, production test-mode blocking, role arrays, and pre-release API Schema checks.
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LookupToolChakanFAQ
When a Schema must forbid a field combination or require at least one array item to match a condition, express it with not and contains, then validate a short sample locally. Use not to block risky combinations such as production plus testMode=true, and contains to require an active admin role or a billing feature entry.
What problems do not and contains solve?
not rejects data that matches a forbidden subschema. contains requires at least one array item to satisfy a condition.
Do these examples upload API data?
No. Schema validation runs in the browser. The sitemap only includes short demo examples, not user input.
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