AJV schema validation fails

Question

I am using Jsonix, I have used below mentioned command to generate jsonix mapping and jsonix schema as,

java -jar jsonix-schema-compiler-full.jar -generateJsonSchema -d mappings books.xsd

it is properly generating mapping and schema, I want to validate JSON using AJV and the generated JSON Schema, so I have tried this,

var fs = require('fs');
var Ajv = require('ajv');

var XMLSchemaJsonSchema = JSON.parse(fs.readFileSync('../node_modules/jsonix/jsonschemas/w3c/2001/XMLSchema.jsonschema').toString());
var JsonixJsonSchema = JSON.parse(fs.readFileSync('../node_modules/jsonix/jsonschemas/jsonix/Jsonix.jsonschema').toString());
var booksJsonSchema = JSON.parse(fs.readFileSync('./books.jsonschema').toString());

var ajv = new Ajv();
ajv.addSchema(XMLSchemaJsonSchema, 'http://www.jsonix.org/jsonschemas/w3c/2001/XMLSchema.jsonschema');
ajv.addSchema(JsonixJsonSchema, 'http://www.jsonix.org/jsonschemas/jsonix/Jsonix.jsonschema');
var validate = ajv.compile(booksJsonSchema);

var data ={
   "book": [
      {
         "@id": "bk001",
         "author": "Writer",
         "title": "The First Book",
         "genre": "Fiction",
         "price": "44.95",
         "pub_date":2000-10-01,
         "review": "An amazing story of nothing."
      },
      {
         "@id": "bk002",
         "author": "Poet",
         "title": "The Poet's First Poem",
         "genre": "Poem",
         "price": "24.95",
         "pub_date":2000-10-02,
         "review": "Least poetic poems."
      }
   ]
};

var valid = validate(data);
if (!valid) {
    console.log('Validation failed errors:');
    console.log(validate.errors);
}else{
    console.log("successfully done validation");
}

But it is throwing error

/Users/qliktag/Desktop/QAGG/qagUI2/Scripts/QLIKTAG-2602/node_modules/ajv/lib/ajv.js:183
    else throw new Error(message);
               ^
Error: schema is invalid: data.definitions['nonPositiveInteger'].anyOf[0].exclusiveMaximum should be number
    at Ajv.validateSchema (/Users/qliktag/Desktop/QAGG/qagUI2/testScripts/node_modules/ajv/lib/ajv.js:185:16)
    at Ajv._addSchema (/Users/qliktag/Desktop/QAGG/qagUI2/Scripts/QLIKTAG-2602/node_modules/ajv/lib/ajv.js:316:10)
    at Ajv.addSchema (/Users/qliktag/Desktop/QAGG/qagUI2/Scripts/QLIKTAG-2602/node_modules/ajv/lib/ajv.js:136:29)
    at Object.<anonymous> (/Users/qliktag/Desktop/QAGG/qagUI2/Scripts/QLIKTAG-2602/mappings/ajvSample.js:248:5)
    at Module._compile (module.js:456:26)
    at Object.Module._extensions..js (module.js:474:10)
    at Module.load (module.js:356:32)
    at Function.Module._load (module.js:312:12)
    at Function.Module.runMain (module.js:497:10)
    at startup (node.js:119:16)

Actually the error comes while ajv addschema, Is I did anything wrong?

According to JSON Scheme, `exclusiveMaximum` must be a number. But in the `www.jsonix.org/jsonschemas/w3c/2001/XMLSchema.jsonschema` the `exclusiveMaximum` is false and ajv is throwing. — Faizuddin Mohammed, Feb 20 '18 at 07:37
https://github.com/json-schema-org/json-schema-spec/blob/master/schema.json and you can see `"exclusiveMaximum": { "type": "number" },` — Faizuddin Mohammed, Feb 20 '18 at 07:38

score 4 · Accepted Answer · answered Feb 20 '18 at 11:24

To continue using draft-04 schemas added meta: false to prevent adding draft-06 meta-schema https://github.com/epoberezkin/ajv/releases/tag/5.0.0

var ajv = new Ajv({
    schemaId: 'id',
    meta: false, 
});

var metaSchema = require('../node_modules/ajv/lib/refs/json-schema-draft-04.json');
ajv.addMetaSchema(metaSchema);
ajv._opts.defaultMeta = metaSchema.id;
ajv._refs['http://json-schema.org/schema'] = 'http://json-schema.org/draft-04/schema';

After adding this use addSchema to allow booleans for exclusiveMaximum

ajv.addSchema(XMLSchemaJsonSchema, 'http://www.jsonix.org/jsonschemas/w3c/2001/XMLSchema.jsonschema');
ajv.addSchema(JsonixJsonSchema, 'http://www.jsonix.org/jsonschemas/jsonix/Jsonix.jsonschema');

Faizuddin Mohammed · Answer 2 · 2018-02-20T11:03:17.530

0

The change of exclusiveMaximum from boolean to number happened with Draft-06/07 of JSON Schema.

// var ajv = new Ajv({schemaId: 'id'});
// If you want to use both draft-04 and draft-06/07 schemas:
var ajv = new Ajv({schemaId: 'auto'});
ajv.addMetaSchema(require('ajv/lib/refs/json-schema-draft-04.json'));

Use this and then addSchema to allow booleans for exclusiveMaximum

ajv.addSchema(XMLSchemaJsonSchema, 'http://www.jsonix.org/jsonschemas/w3c/2001/XMLSchema.jsonschema');
ajv.addSchema(JsonixJsonSchema, 'http://www.jsonix.org/jsonschemas/jsonix/Jsonix.jsonschema');

edited Feb 20 '18 at 11:03

answered Feb 20 '18 at 08:07

Faizuddin Mohammed

4,118
5
27
51

I have tried the changes you suggested but still it is throwing the error the same error which i mentioned above as "exclusiveMaximum should be number". Is there any other change I have to do. – J1617 Feb 20 '18 at 10:03
Which version of `ajv` do you have? – Faizuddin Mohammed Feb 20 '18 at 10:08
I am using ajv@6.1.1 version – J1617 Feb 20 '18 at 10:09
ajv@6 should support changing schema: https://www.npmjs.com/package/ajv – Faizuddin Mohammed Feb 20 '18 at 10:11
One more thing on terminal it is showing "schema $id ignored http://json-schema.org/draft-07/schema# " what does it means exactly? – J1617 Feb 20 '18 at 10:41
I think the draft-04 schema did not load properly – Faizuddin Mohammed Feb 20 '18 at 10:42
I again uninstall and install the ajv npm module but still showing same error – J1617 Feb 20 '18 at 10:44
Let's try the `{schemaId: 'auto'}` – Faizuddin Mohammed Feb 20 '18 at 11:03

score 0 · Answer 3 · answered Feb 21 '18 at 07:42

0

Author of Jsonix here.

As it is pointed out in the documentation, JSON Schema generation is an experimental feature. So it would be not surprizing that it fails. You are welcome to file issues.

answered Feb 21 '18 at 07:42

lexicore

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AJV schema validation fails

3 Answers3