active_model_serializers

ActiveModel::Serializer::Caching#fetch_fragment_cache

1. Create a CachedSerializer and NonCachedSerializer from the serializer class
2. Serialize the above two with the given adapter
3. Pass their serializations to the adapter +::fragment_cache+

It will split the serializer into two, one that will be cached and one that will not

Given a resource name
1. Dynamically creates a CachedSerializer and NonCachedSerializer
  for a given class 'name'
2. Call
      CachedSerializer.cache(serializer._cache_options)
      CachedSerializer.fragmented(serializer)
      NonCachedSerializer.cache(serializer._cache_options)
3. Build a hash keyed to the +cached+ and +non_cached+ serializers
4. Call +cached_attributes+ on the serializer class and the above hash
5. Return the hash

Given a hash of its cached and non-cached serializers
1. Determine cached attributes from serializer class options
2. Add cached attributes to cached Serializer
3. Add non-cached attributes to non-cached Serializer

Source | Google | Stack overflow