Error trying to extend SonataMediaBundle "Impossible to invoke a method ("id") on a null variable"

symfony symfony-sonata sonata sonata-media-bundle

My suggestions are:

When you are creating your builder, use 'empty_on_new' => false.

empty_on_new (default is true): the related data transformer will return null instead of an empty Media instance if no binary content is provided

And you have a ManyToMany relation with PostTags.

Why doesn't you use 'sonata_type_collection' in your ImageAdmin instead of 'sonata_type_model' ?

I hope it will help you.

Good luck !

CodeHunter