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18 lines
518 B
18 lines
518 B
5 years ago
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class AddPositionForInforms < ActiveRecord::Migration[5.2]
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def change
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add_column :informs, :position, :integer, :default => 1
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course_ids = Inform.where(container_type: 'Course').pluck(:container_id).uniq
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courses = Course.where(id: course_ids)
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courses.find_each do |course|
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next if course.informs.count == 1
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informs = course.informs.order("created_at asc")
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informs.each_with_index do |inform, index|
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inform.update_attribute(:position, index+1)
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end
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end
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end
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end
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