嵌套对象的 FindOneAndUpdate答案

【问题标题】：FindOneAndUpdate of a nested object嵌套对象的 FindOneAndUpdate
【发布时间】：2019-12-30 11:25:37
【问题描述】：

我正在尝试更新 JSON 的嵌套对象。我可以编辑该字段，但我无法将位置运算符集成为变量。

这就是我的 JSON 的样子：

{
  "id": "3",
  "name": "Deployment",
  "frequency": "15",
  "lastExecuted": "05.05.2018",
  "maintenanceSteps": {
    "maintenanceStep": [
    {
      "id": "1",
      "shortDescription": "ShortDescription",
      "description": "TestDescription",
      "video": "6.1.mp4",
      "image": "LinkToImage",
      "status": "open",
      "duration": "25"
    },
    {
      "id": "2",
      "shortDescription": "ShortDescription",
      "description": "TestDescription",
      "video": "6.1.mp4",
      "image": "LinkToImage",
      "status": "open",
      "duration": "15"
    }
    ]
  }
}

这就是我尝试设置状态的方式：

resolve: async function (root, param) {
        let setMaintenanceStepStatus = {};
        if (param.status) {
          if(setMaintenanceStepStatus["maintenanceSteps"])
          {
            console.log("true");
            setMaintenanceStepStatus.maintenanceSteps.maintenanceStep[param.id-1].status = param.status;
          }
        console.log("STEP: " + setMaintenanceStepStatus);
        }
        const uMaintenanceStep = await MaintenancePlanModel.findOneAndUpdate({name: param.name},
          { $set:
             {
               "maintenanceSteps.maintenanceStep.1.status": param.status,
              }
          }, {
          new: true
        });
        console.log("MSTEP: " + uMaintenanceStep.maintenanceSteps.maintenanceStep[param.id-1])
        //uMaintenanceStep.maintenanceSteps.maintenanceStep[param.id-1].status = param.status;
        if (!uMaintenanceStep) {
          throw new Error('Error')
        }
        return uMaintenanceStep
      }

问题在于这一行中的位置运算符：

"maintenanceSteps.maintenanceStep.1.status": param.status

如何在其中获取我的 param.id？

使用

"maintenanceSteps.maintenanceStep." + param.id + ".status": param.status

不幸的是不起作用

另一种想法是更改 findOneAndUpdate，这样我就可以直接访问要更新的 maintenanceStep。

我试过这个：

const uMaintenanceStep = await MaintenancePlanModel.findOneAndUpdate({name: param.name, "maintenanceSteps.maintenanceStep.id": param.id},

但我收到此错误消息：“无法读取属性 'maintenanceSteps' of null”。

我的另一个想法是使用 findById 并通过 objectID 搜索 maintenanceStep，因此我不必访问任何嵌套对象。但在这里我得到一个转换错误“Cast to ObjectId failed for value \"{ id: '5d63f6e37276ee1b4cdb99c5' }\" at path \"_id\" for model \"maintenanceStep\"

【问题讨论】：

标签： json mongoose nested graphql

【解决方案1】：

问题的答案是，如果你想传递一个串联的字符串，你需要将它作为一个数组传递：

所以解决办法是：

["maintenanceSteps.maintenanceStep." + [param.id-1] + ".status"]

这是完整的代码：

 resolve: async function (root, param) {
        let setMaintenanceStepStatus = {};
        let one = "maintenanceSteps.maintenanceStep." + [param.id-1] + ".status"
        if (param.status) {
          if(setMaintenanceStepStatus["maintenanceSteps"])
          {
            console.log("true");
            setMaintenanceStepStatus.maintenanceSteps.maintenanceStep[param.id-1].status = param.status;
          }
        console.log("STEP: " + setMaintenanceStepStatus);
        }
        const uMaintenanceStep = await MaintenancePlanModel.findOneAndUpdate({name: param.name, "maintenanceSteps.maintenanceStep.id": param.id},
          { $set:
             {
                [one]: param.status,
              }
          }, {
          new: true
        });
        console.log("MSTEP: " + uMaintenanceStep.maintenanceSteps.maintenanceStep[param.id-1])
        //uMaintenanceStep.maintenanceSteps.maintenanceStep[param.id-1].status = param.status;
        if (!uMaintenanceStep) {
          throw new Error('Error')
        }
        return uMaintenanceStep
      }
    },

【讨论】：