class RenameExpressionColumnsInPosts < ActiveRecord::Migration def change rename_column 'posts', 'expression1_count', 'off_topic_count' rename_column 'posts', 'expression2_count', 'offensive_count' rename_column 'posts', 'expression3_count', 'like_count' remove_column 'posts', 'expression4_count' remove_column 'posts', 'expression5_count' end end