class ChangeWikiContentsTextLimit < ActiveRecord::Migration[4.2] def self.up # Migrates MySQL databases only # Postgres would raise an error (see http://dev.rubyonrails.org/ticket/3818) # Not fixed in Rails 2.3.5 if ActiveRecord::Base.connection.adapter_name =~ /mysql/i max_size = 16.megabytes change_column :wiki_contents, :text, :text, :limit => max_size change_column :wiki_content_versions, :data, :binary, :limit => max_size end end def self.down # no-op end end