method

delete_matched

v5.2.3 - Show latest stable - Class: ActiveSupport::Cache::RedisCacheStore

delete_matched(matcher, options = nil)

public

Supports Redis KEYS glob patterns:

h?llo matches hello, hallo and hxllo
h*llo matches hllo and heeeello
h[ae]llo matches hello and hallo, but not hillo
h[^e]llo matches hallo, hbllo, ... but not hello
h[a-b]llo matches hallo and hbllo

Use \ to escape special characters if you want to match them verbatim.

See redis.io/commands/KEYS for more.

Failsafe: Raises errors.

# File activesupport/lib/active_support/cache/redis_cache_store.rb, line 234
      def delete_matched(matcher, options = nil)
        instrument :delete_matched, matcher do
          unless String === matcher
            raise ArgumentError, "Only Redis glob strings are supported: #{matcher.inspect}"
          end
          redis.with do |c|
            pattern = namespace_key(matcher, options)
            cursor = "0"
            # Fetch keys in batches using SCAN to avoid blocking the Redis server.
            begin
              cursor, keys = c.scan(cursor, match: pattern, count: SCAN_BATCH_SIZE)
              c.del(*keys) unless keys.empty?
            end until cursor == "0"
          end
        end
      end

delete_matched

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