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Rails 5.2 specifying default value for class_attribute
This blog is part of our Rails 5.2 series.
It is very common to set a default value
for a class_attribute.
Before Rails 5.2,
to specify a default value for a class_attribute,
we needed to write like this.
1class ActivityLogger
2class_attribute :logger
3class_attribute :settings
4
5self.logger = Logger.new(STDOUT)
6self.settings = {}
7endAs we can see above,
it requires additional keystrokes
to set a default value for
each class_attribute.
Rails 5.2 has added support
for specifying a default value
for a class_attribute
using default option.
1class ActivityLogger
2class_attribute :logger, default: Logger.new(STDOUT)
3class_attribute :settings, default: {}
4endThis enhancement was introduced in this pull request.
