serializer for external classes

app_config_config.yml

# app/config/config.yml

jms_serializer:
    metadata:
        directories:
            my-file:
                namespace_prefix: "My\\Ns"
                path: "@MyNsBundle/Resources/config/serializer"

File.php

<?php

// My/Ns/File
namespace My\Ns;

class File
{
  
}

My_Ns_Bundle_Resources_config_serializer_My_Ns_File.xml

<!-- My/Ns/Bundle/Resources/config/serializer/My.Ns.File.xml -->
<?xml version="1.0" encoding="UTF-8" ?>
<serializer>
    <class name="My\Ns\File" exclusion-policy="ALL">
    </class>
</serializer>    
        

why is the mapping not work?

The file name with dot-separated components of the class name should not include the namespace prefix. this is exactly what the namespace prefix is about: shortening the file name by allowing to omit the namespace prefix when all classes mapping in your folder are sharing the same namespace prefix.

then the documentation is misleading somehow? http://jmsyst.com/libs/serializer/master/reference/xml_reference ?

mh still not working:

jms_serializer:
    metadata:
        directories:
            issues:
                namespace_prefix: "Rs\\Issues\\"
                path: "@RsIssuesBundle/Resources/config/serializer"

 ls -la vendor/digitalkaoz/issues-bundle/Resources/config/serializer/
Github.GithubIssue.xml
Github.GithubProject.xml

<?xml version="1.0" encoding="UTF-8" ?>
<serializer>
    <class name="Rs\Issues\Github\GithubProject" exclusion-policy="ALL">
    <!-- ... -->
    </class>

@stof this should be correct or?

Try removing the \ at the end of the namespace prefix to see whether it fixes it (I don't use a trailing backslash in my working config, I don't know whether it is important)

tried it in all variations :/

got it working:

jms_serializer:
    metadata:
        directories:
            issues:
                namespace_prefix: "Rs\\Issues"
                path: "@RsIssuesBundle/Resources/config/serializer/issues"

 ls -la vendor/digitalkaoz/issues-bundle/Resources/config/serializer/issues
Github.GithubIssue.xml
Github.GithubProject.xml

<?xml version="1.0" encoding="UTF-8" ?>
<serializer>
    <class name="Rs\Issues\Github\GithubProject" exclusion-policy="ALL">
    <!-- ... -->
    </class>