我可以在Python的JSON模式中验证字符串的内容吗

Question

I want to specify that a string can only be one of four values. How can I do that using the jsonschema library?

Sample code:

"value_params": {
    "required": ["positions", "userId"],
    "properties": {
        "userId": {"type": "integer"},
        "positions": {
            "type": "array",
            "minItems": 1,
            "items": {
                "type": "object",
                "required": ["partnerUserId", "userType"],
                "properties": {
                    "partnerUserId": {"type": "integer"},
                    "userType": {"type": "string"}
                },
                "additionalProperties": False
            }
        }
    },
    "additionalProperties": False
},

The above works fine. What would I need to add to require userType be one of only 4 values?

Answer 1

Take a look at this example schema .

Use enum to restrict a value to a fixed set of values:

"label": {
    "type": "string",
    "enum": ["value1", "value2", "value3", "value4"]
}

It is also possible to define a regex pattern:

"label": {
    "type": "string",
    "pattern": "^value1|value2|value3|value4$"
}