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class AddPraisesCountToLibraries < ActiveRecord::Migration[5.2]
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def change
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add_column :libraries, :praises_count, :integer, :default => 0
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Library.find_each do |library|
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praises_count = library.praise_treads.count
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library.update_column(:praises_count, praises_count)
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end
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end
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end
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