Hey guys, I am trying to use middy for lambda validation. I was also using handler-lib approach before this.( really liked it! ) I tried wrapping middy with handler but it throws callback error. What is the good way of configuring this? I used both of them together because: • cors • I want to format my error responses as in jsend.

I just use my own middleware lib https://www.npmjs.com/package/micro-aws-lambda with ajv and typebox for validation

@Mr.9715 can you share a snippet of what your handler looks like? I can try reproducing it.

Hey @Frank, thanks for reaching out. I created a gist with the code. @Albert Gao, do you have a sample code with ajv?

you create the validation function outside of the handler:validateFunc<_SchemaType_>(_schema_: SchemaType) { return ajv.compile<_Static_<_SchemaType_>>(schema); }, Then, you can create your own function to wrap it: function validate(_validateFunc_: ValidateFunction, _data_: any) { const validationResult = ajvUtils.validate(validateFunc, data); if (validationResult.isError) { throw { error: validationResult.error, }; } return validationResult.data; }

Hey @Albert Gao, are you using some extended version of ajv. (AjvUtils)... Also, do you pass the entire event object to your validator or destructured body path and queryString?

that is just a wrapper for namespacing, so I can type

ajvUtils.

then all options pops up

Thats what I thought, but then I can't find

.validateFunc

😕.

Do this to use middy Create a middyMiddleware.js containing { import middy from '@middy/core'; import httpJsonBodyParser from '@middy/http-json-body-parser'; import httpEventNormalizer from '@middy/http-event-normalizer'; import httpErrorHandler from '@middy/http-error-handler'; export default (handler) => middy(handler).use([ httpJsonBodyParser(), httpEventNormalizer(), httpErrorHandler(), ]); } Then in lambad function do this: import commonMiddleware from middyMiddleware'; export async function xxxxxx (event, context) { your code... } after the function do this. export const handler = commonMiddleware(xxxxxx);