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我有多个大json-schema文件。许多模式文件都有一些共同的属性。

为了消除公共模式定义之间的冗余，将那些在单独的模式文件中分开并使用$ref来引用单个 JSON 模式。

我所有模式文件的目录结构都像

/
|- schemas
   |- components
      |- page_layout.json
   |- page.json

的内容page.json是

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "type": "array",
  "examples": [],
  "items": {
    "type": "object",
    "required": [],
    "additionalProperties": false,
    "properties": {
      "type": {
        "type": "string",
        "enum": [
          "page_layout", "banner_images"
        ]
      },
      "data": {
        "type": "object"
      }
    },
    "allOf": [
      {
        "if": {
          "properties": {
            "type": {
              "const": "page_layout"
            }
          }
        },
        "then": {
          "properties": {
            "data": {
              "$ref": "components/page_layout.json"
            }
          }
        }
      }
    ]
  }
}

文件的内容page_layout.json是

{
  "$schema": "http://json-schema.org/draft-07/schema#",
  "definitions": {},
  "type": "object",
  "required": [],
  "additionalProperties": false,
  "properties": {
    "backgroundColor": {
      "type": "string"
    },
    "templateName": {
      "type": "string",
      "enum": ["linear", "square", "circle"]
    }
  }
}

结合这两个文件，要验证的示例 JSON 数据是

[
  {
    "type": "page_layout"
    "data": {
      "backgroundColor": "#ff00ff",
      "templateName": "square"
    }
  },
  {
    "type": "banner_images"
    "data": {
      // Content for banner_images
    }
  }
]

的内容data会根据type值而变化。

我正在使用python jsonchema来验证 JSON 数据，验证代码是

import json
import jsonschema
import os
from json import JSONDecodeError


class SchemaValidator:
    def __init__(self, category: str):
        self.category = category
        self.data = ''

    def _schema(self):
        schema_file = self.category.replace(' ', '_')
        schema_path = os.path.join(os.path.dirname(__file__), 'json_schema', 'categories', '{}.json'.format(schema_file))

        try:
            with open(schema_path, 'r') as file:
                return json.loads(file.read())
        except FileNotFoundError:
            raise Exception('Schema definition missing')
        except JSONDecodeError:
            raise Exception('Schema definition invalid')

    def validate(self, data):
        self.data = data
        try:
            status = jsonschema.validate(json.loads(data), self._schema())
        except jsonschema.SchemaError as e:
            raise Exception(e)

        return status

但这会给$ref文件带来错误，因为

unknown url type: 'components/page_layout.json'
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