Question 110594 in Json Question posted in
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Validate json with given keys in Javascript and Reactjs

I have below JSON ,

[
 {
  "name":"john",
  "school":"school 2",
  "address":"newyork"
 },
 {
  "name":"peter",
  "school":"school 1",
  "address":"washington"
 }
]

here i want to validate below mentioned things,

1 – it should be an array
2 – it must have only 3 fields (name,school,address) not more that or less than these three fields
3 – "school" can be either ‘school1’ or ‘school2’ and "address" can be either "newyork" or "washington"

I amneed to do this using react js and javascript

Thanks in advance

Tags:

2

Answers


  1. 0

    Here is a simplified function of what you are trying to do

    const validateJSON = (json) => {
  if (!Array.isArray(json)) {
    return false;
  }
  for (const element of json) {
    if (Object.keys(element).length !== 3) {
      return false;
    }
    if (element.school !== "school 1" && element.school !== "school 2") {
      return false;
    }
    if (element.address !== "newyork" && element.address !== "washington") {
      return false;
    }
  }

  return true;
};

    then just use const isValid = validateJSON(json);

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  2. 0

    Validation using yup

    const schema = yup.array()
    .of(
      yup.object().shape({
        name: yup.string().required("Required"),
        school: yup.mixed().oneOf(['school 1','school 2']),
        address: yup.mixed().oneOf(['newyork','washington'])
      }).noUnknown(true)
    )

    and validate,

    await schema.validate(your_object).catch(function (err) {
  err.name; // => 'ValidationError'
  err.errors;
});

    Note: this validation is not tested

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