JSON Serialization Options seem to be ignored

[Vorta]

Symfony: v4.3.2
willdurand/hateoas: v3.1.0
jms/serializer: v3.1.1
jms/serializer-bundle: v3.4.1

I may be missing something, however I've noticed that I'm getting escaped slashes in my serialized output, even though my config looks as follows:

jms_serializer:
    visitors:
        xml_serialization:
            format_output: '%kernel.debug%'
            encoding: 'UTF-8'
        json_serialization:
            options: ['JSON_PRETTY_PRINT', 'JSON_UNESCAPED_SLASHES']

I've tried setting options: in other ways too:

   ...
            options:
                - JSON_PRETTY_PRINT
                - JSON_UNESCAPED_SLASHES

If I deliberately mistype a key, I get an error, so it shows that they are being read. However, the output is not being changed. Slashes are escaped and pretty print is not being performed.

If I dump $options in JsonSerializationVisitor.php, I can see that only the default JSON_PRESERVE_ZERO_FRACTION flag is being used. I have tried to find where are Options from the config being used, however, I was unsuccessful.

[goetas]

hmm. weird. can you check which params are received by the https://github.com/schmittjoh/serializer/blob/master/src/Visitor/Factory/JsonSerializationVisitorFactory.php ?

[Vorta]

I can see that setOptions in JsonSerializationVisitorFactory.php is not being called at any point.

However, https://github.com/schmittjoh/JMSSerializerBundle/blob/master/DependencyInjection/JMSSerializerExtension.php#L199 - This line does get executed and it gets correct parameter.

[goetas]

I see that you are using willdurand/hateoas (but you did not mention its bundle), are you using the hateoas builder or the provided bundle integration? (99% the problem lies there :) )

[Vorta]

Yes, willdurand/hateoas-bundle v2.0.1. I will check if it builds own instance of JMS serializer, ignoring the options.

[Vorta]

Correct, Hateoas was actually the cause. Thank you for your time, and my apologies for a false alarm!