Jorge Manrubia
50 lines
960 B
Ruby
50 lines
960 B
Ruby
module Column::Positioned
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extend ActiveSupport::Concern
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included do
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scope :sorted, -> { order(position: :asc) }
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before_create :set_position
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end
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def move_left
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swap_position_with left_column
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end
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def move_right
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swap_position_with right_column
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end
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def left_column
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board.columns.where("position < ?", position).sorted.last
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end
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def right_column
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board.columns.where("position > ?", position).sorted.first
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end
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def leftmost?
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left_column.nil?
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end
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def rightmost?
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right_column.nil?
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end
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private
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def set_position
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max_position = board.columns.maximum(:position) || 0
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self.position = max_position + 1
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end
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def swap_position_with(other_column)
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return if other_column.nil?
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transaction do
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old_position = self.position
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self.update_column(:position, other_column.position)
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other_column.update_column(:position, old_position)
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end
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end
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end
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