json - 如何根据条件从 JSON 路径提取器中提取值

Question

我想根据条件“status”：“Ready for Review”从 HTTP 采样器的以下 JSON 响应正文获取“currentApproversStr:”的值，并传递给以下 HTTP 采样器。

我尝试了以下但它不工作

1. 创建变量的名称：currentApproversStr
2. JSON 路径表达式：$.[?((@.currentApproversStr == "Validation, Civa" || @.currentApproversStr == "Validation, Darla" || @.currentApproversStr == "Validation, Bittl" || @.currentApproversStr = = "验证，查" || @.currentApproversStr == "验证，巴内特") && @.status== "准备审核")]
3. 比赛编号：-1 或 1

但 Dummy Sampler 会返回结果

我们不能保证具有“状态”的“timecardId”块的顺序：“Ready for Review”，即有时排在第二位，有时排在最后。这是第二个街区。所以不确定匹配号：我应该给什么

[
  {
    "timecardId": 170803,
    "entryHeaderId": "db9341a9-32e8-4d45-a858-a88b75a42cef",
    "startsOn": "2021-10-24T00:00:00",
    "endsOn": "2021-10-30T00:00:00",
    "worksightStatus": "SignedOff",
    "projectId": 1977,
    "userId": 60874,
    "status": "Submitted for Approval",
    "batchId": 39814,
    "emergencyType": "",
    "htgDealMemoId": "0d0ff42b-5c4b-4695-b527-34dfc64585e5",
    "unionId": "1c77c660-28fc-4e40-b557-132f3da39597",
    "currentApproversStr": "Perf, PA",
    "commentStr": "",
    "commentUserName": "",
    "commentCreatedAt": "1900-01-01T00:00:00",
    "occupationCode": "TECHNICIAN",
    "activeApprovalFlowId": 166669,
    "isAllowanceOnly": false,
    "departmentId": null,
    "datePosted": null
  },
  {
    "timecardId": 170807,
    "entryHeaderId": "c9809446-b01f-4f42-add6-9b441c3d0114",
    "startsOn": "2021-10-17T00:00:00",
    "endsOn": "2021-10-23T00:00:00",
    "worksightStatus": "Outstanding",
    "projectId": 1977,
    "userId": 60874,
    "status": "Ready for Review",
    "batchId": 39815,
    "emergencyType": "",
    "htgDealMemoId": "0d0ff42b-5c4b-4695-b527-34dfc64585e5",
    "unionId": "1c77c660-28fc-4e40-b557-132f3da39597",
    "currentApproversStr": "Validation, Civa",
    "commentStr": "",
    "commentUserName": "",
    "commentCreatedAt": "1900-01-01T00:00:00",
    "occupationCode": "TECHNICIAN",
    "activeApprovalFlowId": 166674,
    "isAllowanceOnly": false,
    "departmentId": null,
    "datePosted": null
  },
  {
    "timecardId": 170802,
    "entryHeaderId": "db9341a9-32e8-4d45-a858-a88b75a42cef",
    "startsOn": "2021-10-24T00:00:00",
    "endsOn": "2021-10-30T00:00:00",
    "worksightStatus": "SignedOff",
    "projectId": 1977,
    "userId": 60874,
    "status": "Submitted for Approval",
    "batchId": 39814,
    "emergencyType": "",
    "htgDealMemoId": "0d0ff42b-5c4b-4695-b527-34dfc64585e5",
    "unionId": "1c77c660-28fc-4e40-b557-132f3da39597",
    "currentApproversStr": "Perf, PA",
    "commentStr": "",
    "commentUserName": "",
    "commentCreatedAt": "1900-01-01T00:00:00",
    "occupationCode": "TECHNICIAN",
    "activeApprovalFlowId": 166669,
    "isAllowanceOnly": false,
    "departmentId": null,
    "datePosted": null
  }
]

Answer 1

“匹配号”的工作原理如下：如果您的查询返回超过 1 个结果：

1. 0- 返回随机结果

2. -1- 以下列形式返回所有结果：

   • currentApproversStr_1- 第一场比赛
   • currentApproversStr_2- 第二场比赛
   • 等等
   • currentApproversStr_matchNr- 比赛总数

3. any positive integer- 返回给定的匹配

它不仅适用于JSON Extractor ，还适用于从响应中提取值的所有其他JMeter PostProcessor 。

您可以使用Debug Sampler 和 View Results Tree 侦听器组合查看生成的JMeter 变量：

Answer 2

问题： 原因是您误解了 JSON 提取器的工作方式。此功能允许您在一个设置中提取许多变量，但 number of Names of created variables= number of JSON Path expressions= number of Default Values。

例如，您要提取 2 个变量：

• 创建变量的名称：var_name_1;var_name_2

• JSON 路径表达式：json_expression_1;json_expression_2

• 默认值：default_1;default_2

（注意：记住使用分号 (;) 分隔值）

但是您设置了1 个变量，1 个具有许多默认值的 json 表达式--> 不匹配。

解决方案： 您可以这样设置：

Names of created variables: currentApproversStr
JSON Path expressions: $.[?(@.status== "Ready for Review")].currentApproversStr
Match No: -1
Default Values: NOT_FOUND

结果：

currentApproversStr_1=Validation, Civa
currentApproversStr_matchNr=1