Description
When checking for a schema which get a oneOf or an anyOf we validate type for each schema possible in JsonSchema/Constraints/TypeConstraint::validateType().
But inside this function, when using Constraint::CHECK_MODE_COERCE_TYPES option, we cast the $value (passed by reference to the function) to the type defined in schema which result in a NULL value set to $value this variable isn't castable to the required type.
When then checking for the good type, $value is NULL so it cannot validates.
Here is an example:
We wants to validate that we send a string
'all'or an array containing some strings.
$value = [
'Monday'
];
$schema = [
'type' => 'object',
'properties' => [
'daysOfWeek' => [
'oneOf' => [
[
'type' => 'string',
'enum' => 'all'
],
[
'type' => 'array',
'minItems' => 1,
'items' => ['type' => 'string']
]
]
]
];
$validator = new Validator;
// Cast to object
$value = json_decode(json_encode($value));
$validator->validate($value, $schema, Constraint::CHECK_MODE_COERCE_TYPES);When validating the validator will cast $value to string in JsonSchema/Constraints/TypeConstraint.php:l222 ($value = $this->toString($value);). $value is then gonna equals NULL as the array cannot be casted to string. When then checking for second oneOf schema, it cannot validates.