AJV: check if a property equals another property

Question

By using ajv, how can I reference foo to validate that bar has the same value?

var Ajv = require('ajv');
var ajv = new Ajv({allErrors: true});

var schema = {
  'properties': {
    'foo': { 'type': 'string', 'minLength': 3 },
    'bar': { 'type': 'string', ###HERE### },
  }
};

data = {
  'foo': 'abc',
  'bar': 'ab',
};

ajv.validate(schema, data);   // <-- should return false, foo !== bar

I've tried using (with similar variations):

...
'bar': { 'type': 'string', 'format': { '$data': 'foo' } },
...

But that didn't work.

score 9 · Accepted Answer · answered Apr 17 '17 at 22:07

9

You can:

var ajv = new Ajv({allErrors: true, $data: true}); // for version >=5.0.0

var schema = {
  properties: {
    foo: { type: 'string', minLength: 3 },
    bar: { const: { $data: '1/foo' } },
  }
};

answered Apr 17 '17 at 22:07

esp

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1

Can you explain what `1/` means? – alayor Mar 21 '18 at 17:52
How to do not same as another field? For example, `foo` is not equal to `baz`. – explorer Jan 25 '19 at 04:51
3

@alayor -It's been a while here, but `1/` basically means "go up one level and check the property". – Stefan Dec 16 '19 at 04:09

score 3 · Answer 2 · edited Dec 11 '19 at 02:06

3

@explorer, here it is

foo: {
    type: "string",
    not: {
        const: {
            $data: "1/baz"
        }
    }
}

edited Dec 11 '19 at 02:06

BrDaHa

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answered Sep 19 '19 at 09:39

SirPhemmiey

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What is `1/`?, `$data` is not the static content? – e-info128 Jun 07 '22 at 21:58

AJV: check if a property equals another property

2 Answers2