我需要帮助创建一个 javascript 函数来对 JSON 元素进行分组

如何解决我需要帮助创建一个 javascript 函数来对 JSON 元素进行分组

我有如下所示的 policyTree 中提到的这种格式的 JSON 数据

    let policyTree = [
        {"serviceType": "pcf-sm","policyProject": "Policy_001","policy":"Nchf_001"},{"serviceType": "pcf-sm","policy":"PRA_001"},"policyProject" : "Policy_002","policy":"main"},{"serviceType": "pcf-ue","policyProject": "Policy_003","policy":"ET_001"},"policyProject" : "abc","policy": "main"}
      ]

我需要转换数据，如下块所示。我正在尝试实现以下输出，如下所示。寻找可以完成这项工作的 javascript 函数。

    [
      {
        "serviceType": "pcf-sm","policyProject": [
          {
            "name": "Policy_001","policies": [
              "main","Nchf_001","PRA_001",]
          },{
            "name": "Policy_002","policies": [
              "main"
            ]
          }
        ]
      },{
        "serviceType": "pcf-ue","policyProject": [
          {
            "name": "Policy_003","policies": [
              "ET_001"
            ]
          },{
            "name": "abc","policies": [
              "main"
            ]
          }
        ]
      }
    ]

我尝试了以下方法来实现它的结构，我尝试将 serviceType 分组，但我也必须将 policyProject 与其策略分组

let policyTree = [
            {"serviceType": "pcf-sm","policyProject" : "Policy_001","policyProject": "Policy_002","policy": "main"}
          ]

          console.log(
            Object.values(policyTree.reduce((a,{ serviceType,policyProject,policy }) => {
              if (!a[serviceType]) a[serviceType] = { serviceType,policyProject: [],};
              a[serviceType].policyProject.push({"name": policyProject,"policies": [policy]}); 
              return a;
            },{}))
          );

解决方法

我已经为您编写了一个脚本来执行此操作，认为它符合您的要求，希望对您有所帮助！

let policyTree = [
  { serviceType: 'pcf-sm',policyProject: 'Policy_001',policy: 'Nchf_001' },{ serviceType: 'pcf-sm',policy: 'PRA_001' },policyProject: 'Policy_002',policy: 'main' },{ serviceType: 'pcf-ue',policyProject: 'Policy_003',policy: 'ET_001' },policyProject: 'abc',];

let result = policyTree.reduce((results,input) => {
  const existingServiceType = results.find(
    (c) => c.serviceType === input.serviceType
  );
  if (existingServiceType) {
    const existingPolicyProjectIndex = existingServiceType.policyProject.findIndex(
      (p) => p.name === input.policyProject
    );
    if (existingPolicyProjectIndex !== -1) {
      existingServiceType.policyProject[
        existingPolicyProjectIndex
      ].policies.push(input.policy);
    } else {
      existingServiceType.policyProject.push({
        name: input.policyProject,policies: [input.policy],});
    }
  } else {
    results.push({
      serviceType: input.serviceType,policyProject: [
        {
          name: input.policyProject,},],});
  }

  return results;
},[]);

console.log(result);