db/migrate/20190315094151_change_custom_values_value_limit.rb


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class ChangeCustomValuesValueLimit < ActiveRecord::Migration[5.2]
  def up
    if Redmine::Database.mysql?
      max_size = 16.megabytes
      change_column :custom_values, :value, :text, :limit => max_size
    end
  end

  def down
    # no-op
  end
end