[Bug]: Fails when there is no <title> in <item>

[nie7321]

Describe the bug
When there is no <title> in an RSS feed's <item>, the action fails:

            title: item.title.trim(),
                              ^

TypeError: Cannot read properties of undefined (reading 'trim')

Expected behavior
The RSS file in question is from a microblogging site. It's a valid RSS 2.0 file. Per the RSS 2.0 specification:

All elements of an item are optional, however at least one of title or description must be present.

In this feed, <title> is absent, but <description> is available:

    <item>
      <guid isPermaLink="true">https://mastodon.yshi.org/@owls/110177333762426246</guid>
      <link>https://mastodon.yshi.org/@owls/110177333762426246</link>
      <pubDate>Tue, 11 Apr 2023 00:24:55 +0000</pubDate>
      <description>&lt;p&gt;!deer&lt;/p&gt;</description>
    </item>

If you would like to see the whole feed, it is available at https://mastodon.yshi.org/@owls.rss.

Screenshots
If applicable, add screenshots to help explain your problem.

Workflow Yml Used

name: Dynamic README
on:
  schedule:
    - cron: '0 * * * *'
  workflow_dispatch:
permissions:
  contents: write

jobs:
  update-readme-with-blog:
    name: Update this repo's README with latest blog posts
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Pull in Blog Posts
        uses: gautamkrishnar/blog-post-workflow@v1
        with:
          feed_names: "owlblog,microblog"
          feed_list: "https://godless-internets.org/feed/,http://mastodon.yshi.org/@owls.rss"

[gautamkrishnar]

@nie7321 title check can be disabled by setting disable_item_validation also you can skip items that don't have a title via item_exec read more about that in the options list: https://github.com/gautamkrishnar/blog-post-workflow#options

You can use a combination of templates combined with the above options to make the workflow work.
ex: #142 and #34 (comment)

[gautamkrishnar]

@nie7321 you can ignore item without a title by using the item_exec key. Simply use post = null as the value to ignore the posts without a title.

[gautamkrishnar]

In your case the code will be:

name: Dynamic README
on:
  schedule:
    - cron: '0 * * * *'
  workflow_dispatch:
permissions:
  contents: write

jobs:
  update-readme-with-blog:
    name: Update this repo's README with latest blog posts
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v3
      - name: Pull in Blog Posts
        uses: gautamkrishnar/blog-post-workflow@v1
        with:
          feed_names: "owlblog,microblog"
          feed_list: "https://godless-internets.org/feed/,http://mastodon.yshi.org/@owls.rss"
          disable_item_validation: "true"
          item_exec: "if (!post.title) post = null"

Please let me know if this works.

[lostfocus]

Is there a way to use the <description> if the title isn't set?

[gautamkrishnar]

@lostfocus
try:

name: Latest blog post workflow
on:
  schedule: # Run workflow automatically
    - cron: '0 * * * *' # Runs every hour, on the hour
  workflow_dispatch: # Run workflow manually (without waiting for the cron to be called), through the GitHub Actions Workflow page directly
permissions:
  contents: write # To write the generated contents to the readme

jobs:
  update-readme-with-blog:
    name: Update this repo's README with latest blog posts
    runs-on: ubuntu-latest
    steps:
      - name: Checkout
        uses: actions/checkout@v4
      - name: Pull in dev.to posts
        uses: gautamkrishnar/blog-post-workflow@v1
        with:
          feed_list: "https://dev.to/feed/gautamkrishnar"
          disable_item_validation: "true"
          item_exec: "if (!post.title) post.title = post.description"

[lostfocus]

Hm, I'm getting this error:

/home/runner/work/_actions/gautamkrishnar/blog-post-workflow/master/dist/blog-post-workflow.js:10007
            title: item.title.trim(),
                              ^

TypeError: Cannot read properties of undefined (reading 'trim')
    at /home/runner/work/_actions/gautamkrishnar/blog-post-workflow/master/dist/blog-post-workflow.js:10007:31
    at Array.map (<anonymous>)
    at /home/runner/work/_actions/gautamkrishnar/blog-post-workflow/master/dist/blog-post-workflow.js:9989:157
    at process.processTicksAndRejections (node:internal/process/task_queues:95:5)

Node.js v20.8.1