Function buildOperationArguments

packages/rest/src/parser.ts:58–103

(
  operationSpec: OperationObject,
  request: Request,
  pathParams: PathParameterValues,
  body: RequestBody,
  globalSchemas: SchemasObject,
  options: ValidationOptions = DEFAULT_AJV_VALIDATION_OPTIONS,
)

}

async function buildOperationArguments(
  operationSpec: OperationObject,
  request: Request,
  pathParams: PathParameterValues,
  body: RequestBody,
  globalSchemas: SchemasObject,
  options: ValidationOptions = DEFAULT_AJV_VALIDATION_OPTIONS,
): Promise<OperationArgs> {
  let requestBodyIndex = -1;
  if (operationSpec.requestBody) {
    // the type of `operationSpec.requestBody` could be `RequestBodyObject`
    // or `ReferenceObject`, resolving a `$ref` value is not supported yet.
    if (isReferenceObject(operationSpec.requestBody)) {
      throw new Error('$ref requestBody is not supported yet.');
    }
    const i = operationSpec.requestBody[REQUEST_BODY_INDEX];
    requestBodyIndex = i ?? 0;
  }

  const paramArgs: OperationArgs = [];

  for (const paramSpec of operationSpec.parameters ?? []) {
    if (isReferenceObject(paramSpec)) {
      // TODO(bajtos) implement $ref parameters
      // See https://github.com/loopbackio/loopback-next/issues/435
      throw new Error('$ref parameters are not supported yet.');
    }
    const spec = paramSpec as ParameterObject;
    const rawValue = getParamFromRequest(spec, request, pathParams);
    const coercedValue = await coerceParameter(rawValue, spec, options);
    paramArgs.push(coercedValue);
  }

  debug('Validating request body - value %j', body);
  await validateRequestBody(
    body,
    operationSpec.requestBody,
    globalSchemas,
    options,
  );

  if (requestBodyIndex >= 0) {
    paramArgs.splice(requestBodyIndex, 0, body.value);
  }
  return paramArgs;
}

function getParamFromRequest(
  spec: ParameterObject,