Error Schema must be an object or a boolean, NULL given in

[PavelKoll]

Hi, I have this script for validation
index.php

<?php
use Opis\JsonSchema\{Validator, ValidationResult, ValidationError, Schema};
require 'vendor/autoload.php';
$loader = new \Opis\JsonSchema\Loaders\File("http://test/", [
    "",
]);
$data = json_decode('{
  "title": "TEST",
  "code": "TWOR"
}');
$validator = new Validator();
$validator->setLoader($loader);
/** @var ValidationResult $result */
$result = $validator->uriValidation($data, "http://test/cTest.json");
if ($result->isValid()) {
    echo '$data is valid', PHP_EOL;
} else {
    /** @var ValidationError $error */
    var_dump($result->getErrors());
    $error = $result->getFirstError();
    echo '$data is invalid', PHP_EOL;
    echo "Error: ", $error->keyword(), PHP_EOL; 
    echo json_encode($error->keywordArgs(), JSON_PRETTY_PRINT), PHP_EOL;
}

this JSON schema cTest.json

{
	"$schema": "http://json-schema.org/draft-07/schema#",
	"type": "object",
	"properties": { 
		"title": {
			"$ref": "http://test/title.json#"
		},
		"code": {
			"$ref": "http://test/title.json#"
		}
	},
	"required": ["title", "code"],
    "additionalProperties": false
} 

and this title.json

{
  	"$id": "title.json",
  	"type": "string",
	"minLength": 2,
	"pattern": "^(.*)$"
}

These 3 files are in the same folder.
Script shows this error:
Fatal error: Uncaught Opis\JsonSchema\Exception\InvalidSchemaException: Schema must be an object or a boolean, NULL given in /Data/Projects/test/vendor/opis/json-schema/src/Schema.php:63
Stack trace:
#0 /Data/Projects/test/vendor/opis/json-schema/src/Loaders/File.php(63): Opis\JsonSchema\Schema->__construct(NULL, 'http://test/titl...')
#1 /Data/Projects/test/vendor/opis/json-schema/src/Validator.php(419): Opis\JsonSchema\Loaders\File->loadSchema('http://test/titl...')
#2 /Data/Projects/test/vendor/opis/json-schema/src/Validator.php(322): Opis\JsonSchema\Validator->validateRef(Object(stdClass), 'TEST workcenter', Array, Array, Object(Opis\JsonSchema\Schema), NULL, Object(Opis\JsonSchema\ValidationResult))
#3 /Data/Projects/test/vendor/opis/json-schema/src/Validator.php(1908): Opis\JsonSchema\Validator->validateSchema(Object(stdClass), 'TEST workcenter', Array, Array, Object(Opis\JsonSchema\Schema), Object(stdClass), Object(Opis\JsonSchema\ValidationResult))
#4 /Data/Projects/test/vendor/opis/json-schema/src/Validator.php(946): Opi in /Data/Projects/test/vendor/opis/json-schema/src/Schema.php on line 63

What am I doing wrong?
Thank you.

[sorinsarca]

Hello, try to modify the files like so:

cTest.json

• $id must be present at the root and must be an URI (absolute)
• $refs can use relative URIs (this is not mandatory, but will make the schema more readable)

{
  "$id": "http://test/cTest.json#",
  "$schema": "http://json-schema.org/draft-07/schema#",

  "type": "object",
  "properties": { 
    "title": {
      "$ref": "title.json"
    },
    "code": {
      "$ref": "title.json"
    }
  },
  "required": ["title", "code"],
  "additionalProperties": false
} 

title.json

• $id must be present at the root and must be an URI (absolute)

{
  "$id": "http://test/title.json#",

  "type": "string",
  "minLength": 2,
  "pattern": "^(.*)$"
}

And this should be enough.

[sorinsarca]

Well, I cannot reproduce the issue even with your original files. Are you sure you are using the latest version of opis/json-schema?

[PavelKoll]

Yes, I am using the latest version. I installed it last week

[sorinsarca]

@PavelKoll I cannot reproduce your issue.
Here are the steps I tried:

cd ~
mkdir issue-25
cd issue-25

composer require opis/json-schema

touch index.php
# put the index.php content with nano or similar
touch cTest.json
# put the cTest.json content with nano or similar
touch title.json
# put the title.json content with nano or similar

php index.php
# The output is: $data is valid

[PavelKoll]

I'll try to install it again

[PavelKoll]

I don't know where the error was, but I installed the opis/json-schema again and everything works