如何定义 JSON Schema 要求一个对象数组包含至少 2 个特定值的属性？

Question

我有一个如下所示的数据集：

有效示例数据

{
  type: "step",
  label: "Step 1",
  fields: [
    // An optional field
    {
      type: "email",
      label: "Your Email"
    },
    // A field that is required and can be either amount|preset
    {
      type: "amount",
      label: "Amount"
    },
    // A field that is required and can be either credit_card|ach
    {
      type: "credit_card",
      label: "Credit Card"
    }
  ]
}

fields 数组可以包含许多不同类型的对象。上面的例子是有效的。

无效的示例数据

{
  type: "step",
  label: "Step 1",
  fields: [
    {
      type: "email",
      label: "Your Email"
    },
    {
      type: "credit_card",
      label: "Credit Card"
    }
  ]
}

这应该会出错，因为它不包含 amount 或 presets 类型的对象

验证规则

为了有效，fields 需要包含 2 个对象。

• 其中 1 个必须是 { type: "amount" } 或 { type: "presets" }

• 其中 1 个必须是 { type: "credit_card" } 或 { type: "ach" }

• 这两者的任意组合都会使fields 有效。

JSON 架构

这是我的（失败的）JSON 架构：

{
  "title": "step",
  "type": "object",
  "properties": {
    "type": {
      "title": "type",
      "type": "string"
    },
    "label": {
      "title": "label",
      "type": "string"
    },
    "fields": {
      "title": "fields",
      "description": "Array of fields",
      "type": "array",
      "additionalItems": true,
      "minItems": 1,
      "items": {
        "type": "object",
        "anyOf": [
          { "properties": { "type": { "enum": ["amount", "preset"] } } },
          { "properties": { "type": { "enum": ["credit_card", "ach"] } } }
        ],
        "properties": {
          "type": {
            "type": "string",
          }
        }
      },
    }
  },
  "required": ["type", "label", "fields"]
}

Here is the JSON Schema Validation Reference

我认为在contains、anyOf、allOf、oneOf 和enum 之间我应该能够做到这一点？

Answer 1

将以下内容放入您的 /properties/fields 架构中。这表达了您需要的约束。删除/properties/fields/items/anyOf（它是错误的）和/properties/fields/additionalItems（它什么都不做）。

"allOf": [
  {
    "contains": {
      "properties": { "type": { "enum": ["amount", "presets"] } }
    }
  },
  {
    "contains": {
      "properties": { "type": { "enum": ["credit_card", "ach"] } }
    }
  }
]