管道中的条件总是触发 "Object reference not set to an instance of an object."

Question

我有以下模板，应该设置它以便它始终通过，因为我只是在测试它：

parameters:
- name: services
  type: object
  default:
  - admin-v2

stages:
- stage: UnitTests
  displayName: Run unit tests on service...
  dependsOn: Changed
  condition: succeeded()
  jobs:
  - job: UnitTests
    condition: or(eq(stageDependencies.Changed.Changes.outputs['detectChanges.anyServicesChanged'], true), eq(variables['Build.Reason'], 'Manual'))
    displayName: Running unit tests...
    steps:
    - ${{ each service in parameters.services }}:
      ${{ if eq(${{ service }}, 'admin-v2') }}:
      - bash: |
          echo "Now running ${{ service }} unit tests..."

以下行导致错误：

...
${{ if eq(${{ service }}, 'admin-v2') }}:
...

有：

An error occurred while loading the YAML build pipeline. Object reference not set to an instance of an object.

我几乎在使用 this example 的精简版。

我不确定它为什么会失败，因为在我看来它应该会通过。

关于如何解决这个问题或为什么会导致错误有什么建议吗？

Answer 1

终于想通了...

原来 ${{ }} 在 if 中不是必需的，这是我的疏忽。

所以应该是：

parameters:
- name: services
  type: object
  default:
  - admin-v2

stages:
- stage: UnitTests
  displayName: Run unit tests on service...
  dependsOn: Changed
  condition: succeeded()
  jobs:
  - job: UnitTests
    condition: or(eq(stageDependencies.Changed.Changes.outputs['detectChanges.anyServicesChanged'], true), eq(variables['Build.Reason'], 'Manual'))
    displayName: Running unit tests...
    steps:
    - ${{ each service in parameters.services }}:
      - ${{ if eq(service, 'admin-v2') }}:
        - bash: |
            echo "Now running ${{ service }} unit tests..."

管道中的条件总是触发 "Object reference not set to an instance of an object."

Conditional in pipeline always triggering "Object reference not set to an instance of an object."

azure

azure-devops

azure-pipelines

azure-devops-pipelines