Error while generating Release Notes (TypeError: Cannot read properties of undefined (reading 'length'))

[randywang666]

Azure DevOps Extensions

Generate Release Notes (Node Cross Platform)

Platform

Azure DevOps Services

Azure DevOps Server (TFS) Version

No response

Extension Version

4.5.2

Describe the bug

Hi @rfennell,

My release worked well a few days ago. I didn't change anything. Today, I would like to test it again but threw the below issue.
Could you please help to look at it? Thanks, :)

My template is:

## Build: {{buildDetails.buildNumber}}
* **Branch**: {{replace buildDetails.sourceBranch "refs/heads/" ""}}
* **Tags**: {{buildDetails.tags}}
* **Completed**: {{buildDetails.finishTime}}

## Bugs
| ID & Link | Work Item Title | Priority |
| --- | --- | --- |
{{#forEach this.workItems}}
{{#if (contains (lookup this.fields 'System.WorkItemType') 'Bug')}}
| [{{this.id}}]({{replace this.url "_apis/wit/workItems" "_workitems/edit"}}) | {{lookup this.fields 'System.Title'}} | {{lookup this.fields 'Microsoft.VSTS.Common.Priority'}} |
{{/if}}
{{/forEach}}

Error:

Repo Steps

1. Fixed a bug and commit
2. Run build
3. Create a release pipeline with generating Release Notes
4. See the above error in Description
   ...

Expected Behavior

No response

Logging Information

No response

[rfennell]

The problem only occurs if a pipeline does not generate any published artifacts, I had missed this use case, sorry

The fix is to make sure the containing array is always initialized as an empty array, even if no published artifacts have been found.

I will get a fix out now

[randywang666]

Hi @rfennell,

Thanks for your fixing. Just test it today. It works well right now. I appreciated that. :)

[SBhavana8]

Hi @rfennell ,

I am facing same issue as mentioned above.

Below is the error Screenshot:

Below is version screenshot:

Could you please help us and do the needful.
Thanks in advance.

[rfennell]

In your template you will be trying to check the length of an empty array. You need to check if the array exists before performing an operations, something like

{{#if commits}}
There are {{commits.length}} commits
{{end}}

If you can't resolve the problem, log a new issue but make sure you upload

• the payload.json generated by the task
• your handlebars template
• any custom extension you have written