ZodValidationBehavior

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Defined in: packages/pipeline-zod/src/zod-validation.behavior.ts:112

Pipeline behavior that parses the incoming request (command, query, or event) with a Zod schema when one is attached to the request class via the _zodSchema static property (set automatically by createCommand(), createQuery(), or createZodRequest()).

How it works:

If context.requestType._zodSchema is a ZodType, the behavior runs schema.safeParseAsync(context.request).
On failure it throws ZodValidationError; toHttpResponse() from @cqrs-ddd/pipeline-zod/http maps it to an HTTP 400.
On success, the parsed result must be a plain object because pipeline request identity is preserved in-place. Keys omitted by the schema are deleted and parsed/coerced/defaulted values are assigned before the handler runs. A top-level transform to an array, primitive, Date, or other non-record shape is rejected rather than corrupting the request instance.
If no schema is attached (e.g. a plain event class), the behavior is a transparent no-op and simply calls next().

Registration — globally for all request kinds:

createPipeline({
  globalBehaviors: {
    scope: 'all',
    before: [ZodValidationBehavior],
  },
});

Registration — per handler only:

class CreateUserHandler {
  @pipeline.wrap({ kind: 'command' }, ZodValidationBehavior)
  async handle(command: CreateUserCommand) {}
}

Implements

IPipelineBehavior

Constructors

Constructor

new ZodValidationBehavior(): ZodValidationBehavior

Returns

ZodValidationBehavior

Methods

handle()

handle(context, next): Promise<unknown>

Defined in: packages/pipeline-zod/src/zod-validation.behavior.ts:113

Parameters

context

IPipelineContext

NextDelegate

Returns

Promise<unknown>

Implementation of

IPipelineBehavior.handle