Azure Bicep：部署更新计划时如何忽略空值属性

可以实现。你需要利用Bicep的条件属性和空值判断逻辑，动态决定是否在advancedSchedule中包含monthlyOccurrences属性，避免传入null值导致的报错。

修改后的完整代码 #

param parSchedules array = [
  {
    name: 'mysched1'
    monthlyOccurrencesDay: null
    monthlyOccurrencesOccurence: null
    DaysOfWeek: 'Wednesday'
    StartTime: '${parBaseTimeForUpdateSchedules}T19:00:00'
    tag: {
      Update: [
        'tag1'
      ]
    }
  }
  {
    name: 'mysched2'
    monthlyOccurrencesDay: 'Wednesday'
    monthlyOccurrencesOccurence: 1
    DaysOfWeek: 'Wednesday'
    StartTime: '${parBaseTimeForUpdateSchedules}T07:00:00'
    tag: {
      Update: [
        'tag2'
      ]
    }
  }
]

resource resUpdateschedule 'Microsoft.Automation/automationAccounts/softwareUpdateConfigurations@2019-06-01' = [for schedule in parSchedules: {
  name: schedule.name
  parent: resAutomationAccount
  properties: {
    scheduleInfo: {
      advancedSchedule: {
        // 仅当两个属性都不为null时，才生成monthlyOccurrences
        monthlyOccurrences: !isNull(schedule.monthlyOccurrencesDay) && !isNull(schedule.monthlyOccurrencesOccurence) ? [
          {
            day: schedule.monthlyOccurrencesDay
            occurrence: schedule.monthlyOccurrencesOccurence
          }
        ] : null
        weekDays: [
          schedule.DaysOfWeek
        ]
      }
      description: ''
      frequency: 'Week'
      interval: 1
      isEnabled: true
      startTime: schedule.StartTime
      timeZone: 'UTC'
    }
    updateConfiguration: {
      duration: 'PT2H'
      operatingSystem: 'Windows'
      targets: {
        azureQueries: [
          {
            locations: [
              parLocation
            ]
            scope: [
              subscription().id
            ]
            tagSettings: {
              tags: schedule.tag
            }
          }
        ]
      }
      windows: {
        includedUpdateClassifications: 'Critical, Security'
        rebootSetting: 'IfRequired'
      }
    }
  }
}]

关键逻辑说明 #

• 使用Bicep的!isNull()函数判断参数是否为null，只有当monthlyOccurrencesDay和monthlyOccurrencesOccurence都不为null时，才构建monthlyOccurrences数组。
• 通过条件属性语法（? :），当条件不满足时将属性值设为null，Bicep会自动忽略对象中值为null的属性，不会将其传入API请求。
• 这样既可以复用同一个parSchedules数组，又能为不同计划动态生成符合要求的属性结构。

内容的提问来源于stack exchange，提问作者MoonHorse