Go: how to convert struct to []byte?

Question

I'm trying to use "appengine/memcache" to store data in the cache, memcache.Item's Value field is []byte

how do I convert a struct to []byte for storing it ?

for example:

type Link struct {
    Files []string
}

Answer 1

See the memcache.Codec type, this can be used to convert memcache items. The appengine/memcache package has two codecs already prepared, memcache.Gob and memcache.JSON. You use these codecs instead of the direct call to store and retrieve items from the cache, for example like this for a gob encoded item:

    item := &memcache.Item{
        Key:    myCacheKey,
        Object: &myLinkVar,
    }
    err := memcache.Gob.Set(context, item)