Json Schema对外部字段的依赖

Question

给定一个像这样的 json 结构

{
 "name": "John Doe",
 "billing_address": "123 main st",
 "payment_details":{"credit_card": 55555555}
}

如果 payment_details.credit_card 存在，我需要将“billing_address”设为必填字段。

我从这个示例开始，如果两个字段都处于同一嵌套级别，则可以实现

{
  "type": "object",

  "properties": {
    "name": { "type": "string" },
    "credit_card": { "type": "number" }
  },

  "required": ["name"],

  "dependencies": {
    "credit_card": {
      "properties": {
        "billing_address": { "type": "string" }
      },
      "required": ["billing_address"]
    }
  }
}

但是，要求这个比依赖字段高一级的字段的语法是什么？

Answer 1

这对于“依赖”来说太复杂了，所以我们回到 if/then/else 子句。我们将这些关键字放在需要字段的顶层。在伪代码中：“如果存在 payment_details 属性，并且它具有 credit_card 属性，则需要 billing_address。”

{
  ...,
  "if": {
    "type": "object",
    "required": [ "payment_details" ],
    "properties": {
      "payment_details": {
        "type": "object",
        "required": [ "credit_card" ]
      }
    },
  "then": {
    "type": "object",
    "required": [ "billing_address" ]
  }
}

请注意，此处需要“type”和“required”关键字——因为不同类型的数据（例如数组）会导致对象特定的关键字（如“properties”和“required”）始终评估为真。

Answer 2

感谢以太！这有效，但只有在将信用卡添加为属性之后，在if 部分。 完整的 if 语句如下所示

"if": {
       "type": "object",
  "required": ["payment_details"],      
       "properties": {
              "payment_details": {
            "type": "object",
            "properties": {
                "credit_card": {}
            },
                        "required": ["credit_card"]
        }}},

完整的 json 架构如下所示

{
    "$schema": "http://json-schema.org/draft-07/schema#", 
    "type": "object",
    "properties": {
        "name": {
            "type": "string"
        },
        "billing_address": {
            "type": "string"
        },
        "payment_details": {
            "type": "object",
            "properties": {
                "credit_card": {
                    "type": "integer"
                }
            }
        }
    }
,    
"if": {
       "type": "object",
  "required": ["payment_details"],      
       "properties": {
              "payment_details": {
            "type": "object",
            "properties": {
                "credit_card": {}
            },
                        "required": ["credit_card"]
        }}},
  "then": {
    "type": "object",
    "required": [ "billing_address" ]
  }
}