Spreadsheet Architect is a library that allows you to create XLSX, ODS, or CSV spreadsheets super easily from ActiveRecord relations, plain Ruby objects, or tabular data. When NOT using the :data option, ie. on an AR Relation or using the :instances option, Spreadsheet Architect requires an instance method defined on the class to generate the data. It looks for the spreadsheet_columns method on the class. If you are using on an ActiveRecord model and that method is not defined, it would fallback to the models column_names method (not recommended). If using the :data option this is ignored.