How do I run a GitHub Actions workflow only on pull request reviews for certain branches?

Question

I need to have a workflow that only runs on pull request reviews to the production branch but currently they are running on all pull request reviews.

I tried all of these options:

on:
  pull_request_review:
    types: [submitted, edited]
    branches:
      - production

on:
  pull_request_review:
    types: [submitted, edited]
    branches: [production]

on:
  pull_request_review:
    types: [submitted, edited]
    branches: production

and the workflow gets executed when there's a pull request review from feature-branch to main (not touching production) at all.

What am I missing? How do you do this?

---

In GitHub Actions: run step only for certain pull request base branches, there's this workflow:

name: my-workflow
on:
  push:
    branches:
      - develop
  pull_request:
    branches:
      - develop
      - main
    types:
      - closed

and the answer assumes that branches: just works correctly. There's no mention about what else to do to make branches: work. I already added a branches: to my workflow and it's being ignored.

Answer 1

The branches and branches-ignore filters work on the following events:

• pull_request, pull_request_target
• push
• workflow_run

The pull_request_review is not among those. You can use the if to conditionally execute jobs. In this case, check if the "base" (merge target) is "production":

name: PR_review

on:
  pull_request_review:
    types: [submitted, edited]

jobs:
  test:
    if: ${{ github.event.pull_request.base.ref == 'production' }}
    runs-on: ubuntu-latest
    steps:
      - name: Debug
        run: |
          echo ${{ github.event_name }}
          echo ${{ github.ref }}
          echo ${{ github.event.pull_request.head.ref }}
          echo ${{ github.event.pull_request.base.ref }}

Now when a review is submitted to another branch, this workflow will run - but its job will be marked as "skipped".