JMSSerializationBundle无法基于组序列化属性

I am trying to serialize based on the groups that I have specified on my Product class. The full product class can be seen here. Here's the code that I am using following the example on the documentation here:

  $serializer = $this->get('serializer');
        $result = $serializer->serialize($param, 'json', SerializationContext::create()->setGroups(array('marketplace')));

So $param above is essentially an array of Product objects.

However, for some reason this still outputs all of the Product attribute that I don't want (i.e: attribute that belongs to other groups not 'marketplace'). For example the attribute 'description'. I've marked description to be in the 'detail' group, but why is it still being returned as a part of the response when I asked for the 'marketplace' group?

/**
 * @Groups({"detail"}) 
 * @ORM\Column(name="description", type="string", length=350)
 */
protected $description;

Try to remove @ExclusionPolicy("none") annotation.

You need use @ExclusionPolicy("all") for class and @Expose for each field you want to serialize.