ActiveSupport::Deprecation::Behavior

Behavior module allows to determine how to display deprecation messages. You can create a custom behavior or set any from the DEFAULT_BEHAVIORS constant. Available behaviors are:

raise: Raise ActiveSupport::DeprecationException.
stderr: Log all deprecation warnings to +$stderr+.
log: Log all deprecation warnings to Rails.logger.
notify: Use ActiveSupport::Notifications to notify deprecation.rails.
silence: Do nothing.

Setting behaviors only affects deprecations that happen after boot time. For more information you can read the documentation of the behavior= method.

Attributes

[RW]

debug

Whether to print a backtrace along with the warning.

Instance Public methods

behavior()

Returns the current behavior or if one isn't set, defaults to :stderr.

📝 Source code

# File activesupport/lib/active_support/deprecation/behaviors.rb, line 66
      def behavior
        @behavior ||= [DEFAULT_BEHAVIORS[:stderr]]
      end

🔎 See on GitHub

behavior=(behavior)

Sets the behavior to the specified value. Can be a single value, array, or an object that responds to call.

Available behaviors:

raise: Raise ActiveSupport::DeprecationException.
stderr: Log all deprecation warnings to +$stderr+.
log: Log all deprecation warnings to Rails.logger.
notify: Use ActiveSupport::Notifications to notify deprecation.rails.
silence: Do nothing.

Setting behaviors only affects deprecations that happen after boot time. Deprecation warnings raised by gems are not affected by this setting because they happen before Rails boots up.

ActiveSupport::Deprecation.behavior = :stderr
ActiveSupport::Deprecation.behavior = [:stderr, :log]
ActiveSupport::Deprecation.behavior = MyCustomHandler
ActiveSupport::Deprecation.behavior = ->(message, callstack, deprecation_horizon, gem_name) {
  # custom stuff
}

📝 Source code

# File activesupport/lib/active_support/deprecation/behaviors.rb, line 91
      def behavior=(behavior)
        @behavior = Array(behavior).map { |b| DEFAULT_BEHAVIORS[b] || arity_coerce(b) }
      end

🔎 See on GitHub