Investigate workflow user error (#10952)

Investigation related to https://github.com/twentyhq/twenty/issues/10868

- throw an error when computedVersion is undefined

packages/twenty-server/src/engine/core-modules/serverless/drivers/lambda.driver.ts

@@ -288,12 +288,9 @@ export class LambdaDriver implements ServerlessDriver {
 
     const startTime = Date.now();
 
-    const computedVersion =
-      version === 'latest' ? serverlessFunction.latestVersion : version;
-
     const folderPath = getServerlessFolder({
       serverlessFunction,
-      version: computedVersion,
+      version,
     });
 
     const tsCodeStream = await this.fileStorageService.read({

packages/twenty-server/src/engine/core-modules/serverless/drivers/local.driver.ts

@@ -82,12 +82,9 @@ export class LocalDriver implements ServerlessDriver {
 
     const startTime = Date.now();
 
-    const computedVersion =
-      version === 'latest' ? serverlessFunction.latestVersion : version;
-
     const folderPath = getServerlessFolder({
       serverlessFunction,
-      version: computedVersion,
+      version,
     });
 
     const tsCodeStream = await this.fileStorageService.read({

packages/twenty-server/src/engine/core-modules/serverless/utils/serverless-get-folder.utils.ts

@@ -1,8 +1,14 @@
 import { join } from 'path';
 
+import { isDefined } from 'twenty-shared';
+
 import { FileFolder } from 'src/engine/core-modules/file/interfaces/file-folder.interface';
 
 import { ServerlessFunctionEntity } from 'src/engine/metadata-modules/serverless-function/serverless-function.entity';
+import {
+  ServerlessFunctionException,
+  ServerlessFunctionExceptionCode,
+} from 'src/engine/metadata-modules/serverless-function/serverless-function.exception';
 
 export const getServerlessFolder = ({
   serverlessFunction,
@@ -14,10 +20,17 @@ export const getServerlessFolder = ({
   const computedVersion =
     version === 'latest' ? serverlessFunction.latestVersion : version;
 
+  if (!isDefined(computedVersion)) {
+    throw new ServerlessFunctionException(
+      'Cannot compute serverless folder for undefined version',
+      ServerlessFunctionExceptionCode.SERVERLESS_FUNCTION_VERSION_NOT_FOUND,
+    );
+  }
+
   return join(
     'workspace-' + serverlessFunction.workspaceId,
     FileFolder.ServerlessFunction,
     serverlessFunction.id,
-    computedVersion || '',
+    computedVersion,
   );
 };