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module ActiveStorage::Attached::Macros
# Specifies the relation between a single attachment and the model.
#
# class User < ActiveRecord::Base
# has_one_attached :avatar
# end
#
# There is no column defined on the model side, Active Storage takes
# care of the mapping between your records and the attachment.
#
# If the +:dependent+ option isn't set, the attachment will be purged
# (i.e. destroyed) whenever the record is destroyed.
def has_one_attached(name, dependent: :purge_later)
define_method(name) do
instance_variable_get("@active_storage_attached_#{name}") ||
instance_variable_set("@active_storage_attached_#{name}", ActiveStorage::Attached::One.new(name, self))
end
has_one :"#{name}_attachment", -> { where(name: name) }, class_name: "ActiveStorage::Attachment", as: :record
has_one :"#{name}_blob", through: :"#{name}_attachment"
if dependent == :purge_later
before_destroy { public_send(name).purge_later }
end
end
# Specifies the relation between multiple attachments and the model.
#
# class Gallery < ActiveRecord::Base
# has_many_attached :photos
# end
#
# There are no columns defined on the model side, Active Storage takes
# care of the mapping between your records and the attachments.
#
# If the +:dependent+ option isn't set, all the attachments will be purged
# (i.e. destroyed) whenever the record is destroyed.
def has_many_attached(name, dependent: :purge_later)
define_method(name) do
instance_variable_get("@active_storage_attached_#{name}") ||
instance_variable_set("@active_storage_attached_#{name}", ActiveStorage::Attached::Many.new(name, self))
end
has_many :"#{name}_attachments", -> { where(name: name) }, as: :record, class_name: "ActiveStorage::Attachment"
has_many :"#{name}_blobs", through: :"#{name}_attachments"
if dependent == :purge_later
before_destroy { public_send(name).purge_later }
end
end
end
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