I am excited to announce a new release of Groundhog 0.2 - a library for high-level database access. * http://hackage.haskell.org/package/groundhog * http://hackage.haskell.org/package/groundhog-th * http://hackage.haskell.org/package/groundhog-postgresql * http://hackage.haskell.org/package/groundhog-sqlite * http://github.com/lykahb/groundhog Since the last release I got a lot of positive feedback which showed that many people are interested in the project. I want to thank them for their encouragement and constructive suggestions that helped me to adjust the development priorities. To help keeping track of the Groundhog project development, the most important changes of a release are now logged to the HISTORY files in repository. Along with many small improvements and refactorings, this major release has two novel features: * Support for database unique indexes. Now the unique keys can be created with either constraints or indexes. In the API the difference affects only the code generation settings which have a new field * Customizing column type name for schema migration. This contributes to compatibility with already existing databases and allows utilization of the database-specific features like limiting string size or number precision. See example at https://github.com/lykahb/groundhog/blob/master/examples/dbSpecificTypes.hs Package groundhog-th has improved error reporting. Now it precisely reports the line and position where parsing of the YAML-based settings failed. This required a patch in the yaml dependency, so other yaml package users have this fix as well. The full description of the YAML settings format is available at http://hackage.haskell.org/packages/archive/groundhog-th/0.2.0/doc/html/Data... I appreciate your feedback.