Powerapps 难以在 collection 中访问 JSON

Question

我无法通过 PowerApps 访问 collection 中的数据。

我用这个创建 collection：

Collect(coll15,mt.GetAnswers("3b....da","application/json",{question:"eco"}))

使用开发人员工具 -> 网络选项卡 -> 响应正文 - 返回以下 JSON 数据：

{
"answers": [
{
  "answer": "This is the answer",
  "questions": [
    "Private vehicle eco renewal"
  ],
  "score": 82.901087775826454
}
]
}

已创建 collection。

然后我将画廊控件添加到我的页面 - 但是我必须绑定到标签的唯一选项是：ThisItem.Value

如果我尝试输入 ThisItem.Value.answer，我会收到错误消息：“.”的使用无效

如果我输入 ThisItem.answers.answer，我会收到错误消息：名称无效

这是 swagger 文件：

{
"swagger": "2.0",
"info": {
  "version": "1.0.0",
  "title": "mt",
  "description": "mt"
},
"host": "westus.api.cognitive.microsoft.com:443",
"basePath": "/",
"schemes": [
  "https"
],
"consumes": [],
"produces": [
  "application/json"
],
"paths": {
  "/qnamaker/v2.0/knowledgebases/eeeee.....eeeee/generateAnswer": {
     "post": {
        "summary": "GetAnswers",
        "description": "Get answers from qna",
        "operationId": "GetAnswers",
        "parameters": [
           {
              "name": "body",
              "in": "body",
              "schema": {
                 "type": "object",
                 "properties": {
                    "question": {
                       "type": "string",
                       "description": "question",
                       "x-ms-summary": "question",
                       "title": "question",
                       "x-ms-visibility": ""
                    }
                 },
                 "default": {
                    "question": "hi"
                 },
                 "required": [
                    "question"
                 ]
              },
              "required": true
           }
        ],
        "responses": {
           "default": {
              "description": "default",
              "schema": {
                 "type": "string"
              }
           }
        }
     }
  }
},
"definitions": {},
"parameters": {},
"responses": {},
"securityDefinitions": {
  "api_key": {
     "type": "apiKey",
     "in": "header",
     "name": "Ocp-Apim-Subscription-Key"
  }
},
"security": [
  {
     "oauth2_auth": [
        "Offline-Access"
     ]
  }
],
"tags": []
}

我有什么方法可以访问 collection 中的答案文本吗？

感谢您的帮助，

马克

Answer 1

问题是连接器定义中操作的响应类型是字符串：

    "responses": {
       "default": {
          "description": "default",
          "schema": {
             "type": "string"
          }
       }
    }

但你的回应是一个对象。如果您将自定义连接器更新为使用类型化对象，您应该能够访问操作的响应。符合以下架构的内容：

    "responses": {
      "default": {
        "description": "default",
        "schema": {
          "type": "object",
          "properties": {
            "answers": {
              "type": "array",
              "items": {
                "type": "object",
                "properties": {
                  "answer": {
                    "type": "string"
                  },
                  "questions": {
                    "type": "array",
                    "items": {
                      "type": "string"
                    }
                  },
                  "score": {
                    "type": "number",
                    "format": "float"
                  }
                }
              }
            }
          }
        }
      }
    },

请注意，在门户 (web.powerapps.com) 中，如果您转到自定义连接器定义，并且 select "Edit"，您可以转到操作，并且 select 您要编辑的回复：

然后使用"Import from sample"选项

这样，如果您输入来自 API 的响应示例，它将为您创建模式（与我上面的模式类似）。

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