使用JSON模式对另一个模式验证属性

Question

在下面的模型中，只有当“detail”数组为空时，才需要“category_id”属性。

如果“detail”数组不为空，则不需要“category_id”属性。

我该如何使用JSON模式来做到这一点？

{ 
    "description": "Expense model validation.", 
    "type": "object", 
    "properties": { 
     "description": { 
      "type": "string" 
     }, 
     "category_id": { 
      "type": "string" 
     }, 
     "detail": { 
      "type": "array", 
      "items": { 
       "description": "Expense detail", 
       "type": "object", 
       "properties": { 
        "description": { 
         "type": "string" 
        } 
       }, 
       "required": [ "description" ] 
      } 
     } 
    }, 
    "required": [ "description", "category_id" ] 
} 

Answer 1

您可以使用anyOf检查，要么category_id存在，或detail存在，并且至少有一个项目。

{ 
    "description": "Expense model validation.", 
    "type": "object", 
    "properties": { 
    "description": { "type": "string" }, 
    "category_id": { "type": "string" }, 
    "detail": { 
     "type": "array", 
     "items": { 
     "description": "Expense detail", 
     "type": "object", 
     "properties": { 
      "description": { "type": "string" } 
     }, 
     "required": ["description"] 
     } 
    } 
    }, 
    "required": ["description"], 
    "anyOf": [ 
    { "required": ["category_id"] }, 
    { 
     "properties": { 
     "detail": { "minItems": 1 } 
     }, 
     "required": ["detail"] 
    } 
    ] 
}