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module ActiveRecord
module Attributes
module Aliasing
# Allows access to keys using aliased names.
#
# Example:
# class Attributes < Hash
# include Aliasing
# end
#
# attributes = Attributes.new
# attributes.aliases['id'] = 'fancy_primary_key'
# attributes['fancy_primary_key'] = 2020
#
# attributes['id']
# => 2020
#
# Additionally, symbols are always aliases of strings:
# attributes[:fancy_primary_key]
# => 2020
#
def [](key)
super(unalias(key))
end
def []=(key, value)
super(unalias(key), value)
end
def aliases
@aliases ||= {}
end
def unalias(key)
key = key.to_s
aliases[key] || key
end
end
end
end
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