Feature request: implement parser decorator #1816
Description
Use case
Similar to middy middleware we want to use build-in schemas and envelopes to parse and extract events using decorators.
Solution/User Experience
Based on the RFC the decorator should take model and envelope as an param object:
const order = z.object({
id: z.number(),
description: z.string(),
});
type Order = z.infer<typeof order>;
class Lambda implements LambdaInterface {
// Decorate your handler class method
@logger.injectLambdaContext()
@parser({eventBridgeEnvelope, order})
public async handler(
_event: OrderModel,
_context: Context
): Promise<void> {
logger.info(`Received order model ${_event}`);
}
}we should also be able to pass only the model, which can be a custom event or an extension of the built-in schema i.e.
const order = z.object({
id: z.number(),
description: z.string(),
});
const customEBschema = EventBridgeSchema.extend({
detail: order,
});Alternative solutions
No response
Acknowledgment
- This feature request meets Powertools for AWS Lambda (TypeScript) Tenets
- Should this be considered in other Powertools for AWS Lambda languages? i.e. Python, Java, and .NET
Future readers
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