JSON 模式验证问题（patternProperties）

Question

I ran into the problem of compiling a JSON schema for a similar REST API response. I use https://ajv.js.org / for schema validation.

"2014" is the year, "6" is the month of the year

There may be different years in this scheme and there may be different months in each year. There is no strict sequence.

I have run out of ideas on how to correctly describe such a scheme in order to control the correctness of the spelling of the year and month (if the answer comes "22", instead of "2022", then it will be a big problem)

I tried "patternProperties" (ajv), but it doesn't give a result. I will be glad of any good idea or hint. Thanks.

{
    "2014": {
        "6": [
            {
                "code": "code1",
                "name": "item1"
            },
            {
                "code": "code2",
                "name": "item2"
            },
        ],
        "7": [
            {
                "code": "code1",
                "name": "item1"
            },
            {
                "code": "code1",
                "name": "item2"
            },
        ],
    }
    "2020": {
        "2": [
            {
                "code": "code1",
                "name": "item1"
            },
            {
                "code": "code2",
                "name": "item2"
            },
        ],
        "11": [
            {
                "code": "code1",
                "name": "item1"
            },
            {
                "code": "code1",
                "name": "item2"
            },
        ],
    }
}

Answer 1

This will give you the last two numbers of the year every time and will help you prevent the problem you described if the years in your object are 100 years apart. More than that will probably require a whole load of regex for greater precision.

const obj = {
 2014: {
  6: [
   {
    code: "code1",
    name: "item1",
  },
 ],
},
14: {
 11: [
  {
   code: "code1",
   name: "item1",
  },
 ],
},
};

for (const [key, value] of Object.entries(obj)) {
 const numbers = key.split("");
 const year = numbers[numbers.length - 2] + "" + numbers[numbers.length - 1];

 console.log(year);
}