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module Joint
module InstanceMethods
def grid
@grid ||= Mongo::Grid.new(database)
end
private
def assigned_attachments
@assigned_attachments ||= {}
end
def nil_attachments
@nil_attachments ||= {}
end
# IO must respond to read and rewind
def save_attachments
assigned_attachments.each_pair do |name, io|
next unless io.respond_to?(:read)
io.rewind if io.respond_to?(:rewind)
grid.delete(send(name).id)
grid.put(io, {
:_id => send(name).id,
:filename => send(name).name,
:content_type => send(name).type,
})
end
assigned_attachments.clear
end
def nullify_nil_attachments_attributes
nil_attachments.each_key do |name|
send(:"#{name}_id=", nil)
send(:"#{name}_size=", nil)
send(:"#{name}_type=", nil)
send(:"#{name}_name=", nil)
end
end
def destroy_nil_attachments
nil_attachments.each_value do |id|
grid.delete(id)
end
nil_attachments.clear
end
def destroy_all_attachments
self.class.attachment_names.map { |name| grid.delete(send(name).id) }
end
end
end
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