22 lines
593 B
Ruby
22 lines
593 B
Ruby
class Page < ApplicationRecord
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belongs_to :report, touch: true
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has_many :elements, -> { order(:position) }, dependent: :destroy
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has_rich_text :comment
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before_validation :set_position
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before_update :update_positions, if: :position_changed?
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private
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def set_position
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self.position ||= (report.pages.pluck(:position).max || 0) + 1
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end
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def update_positions
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if position_was
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report.pages.where("position > ?", position_was).update_all("position = position - 1")
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end
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report.pages.where(position: position..).update_all("position = position + 1")
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end
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end
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