Question 1

How to integrate Redis::Objects with ActiveRecord in Rails?

Accepted Answer

Include Redis::Objects in your model, define Redis data types like counters or lists, and set up the Redis connection in an initializer. Keys are automatically scoped using the model's ID for seamless integration.

Question 2

Redis::Objects or redis-rb: which is better for my Ruby project?

Accepted Answer

Use Redis::Objects if you need atomic operations and tight model integration; opt for redis-rb for lower-level control or when using Redis features not covered by the gem, like streams or modules.

Question 3

How to migrate old keys when upgrading to Redis::Objects 2.0?

Accepted Answer

Run the migrate_redis_legacy_keys method on affected nested classes during a write pause, then switch Redis::Objects.prefix_style to :modern. Your existing data becomes inaccessible until the prefix style is changed, as noted in the README.

Question 4

Can I use Redis::Objects for distributed locks in a multi-server setup?

Accepted Answer

Yes, it provides a Redis::Lock class with expiration support, ideal for coordinating batch jobs across servers. The lock method ensures atomicity and automatically releases on completion or exception.

Question 5

How to handle custom JSON serialization with Redis::Objects?

Accepted Answer

Set the serializer option to a custom class like JSON when defining values or lists with :marshal => true. Ensure the class implements dump and load methods, as described in the custom serialization section.

Question 6

What are the performance implications of using Redis::Objects?

Accepted Answer

The abstraction adds minimal overhead for most operations, but in high-throughput scenarios, direct Redis calls via the redis handle might be faster. However, atomicity is preserved, which is crucial for concurrency.

Redis-Objects

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