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remove_attachment.rb
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remove_attachment.rb
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# frozen_string_literal: true
class Shrine
module Plugins
# Documentation can be found on https://shrinerb.com/docs/plugins/remove_attachment
module RemoveAttachment
module AttachmentMethods
def define_model_methods(name)
super if defined?(super)
define_method :"remove_#{name}=" do |value|
send(:"#{name}_attacher").remove = value
end
define_method :"remove_#{name}" do
send(:"#{name}_attacher").remove
end
end
end
module AttacherMethods
# We remove the attachment if the value evaluates to true.
def remove=(value)
@remove = value
change(nil) if remove?
end
def remove
@remove
end
private
# Don't override previously removed attachment that wasn't yet deleted.
def change?(file)
super && !(changed? && remove?)
end
# Rails sends "0" or "false" if the checkbox hasn't been ticked.
def remove?
return remove if [true, false].include?(remove)
remove && remove != "" && remove !~ /\A(0|false)\z/
end
end
end
register_plugin(:remove_attachment, RemoveAttachment)
end
end