class method `self.new`

Ruby on Rails 5.2.8.1

Since v5.2.8.1

Available in: v5.2.8.1 v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2

Compare with:

self.new(namespace: nil, compress: true, compress_threshold: 1.kilobyte, expires_in: nil, race_condition_ttl: nil, error_handler: DEFAULT_ERROR_HANDLER, **redis_options)

Creates a new Redis cache store.

Handles three options: block provided to instantiate, single URL provided, and multiple URLs provided.

:redis Proc   -> options[:redis].call
:url   String -> Redis.new(url: …)
:url   Array  -> Redis::Distributed.new([{ url: … }, { url: … }, …])

No namespace is set by default. Provide one if the Redis cache server is shared with other apps: <tt>namespace: ‘myapp-cache’<tt>.

Compression is enabled by default with a 1kB threshold, so cached values larger than 1kB are automatically compressed. Disable by passing compress: false or change the threshold by passing compress_threshold: 4.kilobytes.

No expiry is set on cache entries by default. Redis is expected to be configured with an eviction policy that automatically deletes least-recently or -frequently used keys when it reaches max memory. See redis.io/topics/lru-cache for cache server setup.

Race condition TTL is not set by default. This can be used to avoid “thundering herd” cache writes when hot cache entries are expired. See ActiveSupport::Cache::Store#fetch for more.

Parameters

namespace key = nil
compress key = true
compress_threshold key = 1.kilobyte
expires_in key = nil
race_condition_ttl key = nil
error_handler key = DEFAULT_ERROR_HANDLER
redis_options keyrest

Source

# File activesupport/lib/active_support/cache/redis_cache_store.rb, line 166
      def initialize(namespace: nil, compress: true, compress_threshold: 1.kilobyte, expires_in: nil, race_condition_ttl: nil, error_handler: DEFAULT_ERROR_HANDLER, **redis_options)
        @redis_options = redis_options

        @max_key_bytesize = MAX_KEY_BYTESIZE
        @error_handler = error_handler

        super namespace: namespace,
          compress: compress, compress_threshold: compress_threshold,
          expires_in: expires_in, race_condition_ttl: race_condition_ttl
      end

Defined in activesupport/lib/active_support/cache/redis_cache_store.rb line 166 · View on GitHub · Improve this page · Find usages on GitHub

Defined in ActiveSupport::Cache::RedisCacheStore

Signature

Parameters