如何根据 json 模式中根对象的值验证对象？答案

【问题标题】：How to validate a object based on the value of root object in json schema?如何根据 json 模式中根对象的值验证对象？
【发布时间】：2020-10-08 07:59:34
【问题描述】：

我想根据 ordertype 的值验证销售日期和客户可用性。（注意，它们不在同一个对象下）。有没有办法根据根值验证子值？

 {
      "type": "object",
      "properties": {
        "Order": {
          "type": "object",
          "properties": {
            "OrderDetails": {
              "type": "object",
              "properties": {
                "OrderType": {
                  "type": "string",
                  "enum": [
                    "Y",
                    "N"
                  ]
                }
              }
            }
          }
        },
        "Sale": {
          "type": "object",
          "properties": {
            "Saledate": {
              "format": "date"/*should be present when OrderType is Y*/
            }
          }
        },
        "Customer": {
          "type": "object",
          "properties": {
            "Avilability": {
              "type": "string",
              "enum": [
                "Y",
                "N"
              ]/*should be present when orderType is Y*/
            }
          }
        }
      }
    }

【问题讨论】：

标签： json jsonschema json-schema-validator

【解决方案1】：

您可以使用if/then 来创建描述约束。诀窍是您需要在架构中足够高的级别添加约束，以涵盖所有涉及的属性。

{
  ...
  "if": {
    "type": "object",
    "properties": {
      "Order": {
        "type": "object",
        "properties": {
          "OrderDetails": {
            "type": "object",
            "properties": {
              "OrderType": { "const": "Y" }
            },
            "required": ["OrderType"]
          }
        },
        "required": ["OrderDetails"]
      }
    },
    "required": ["Order"]
  },
  "then": {
    "properties": {
      "Sale": { "required": ["Saledate"] },
      "Customer": { "required": ["Availability"] }
    },
    "required": ["Sale", "Customer"]
  }
}

【讨论】：