NAME

       DBIx::Class::DeploymentHandler::Dad - Parent class for DeploymentHandlers

METHODS THAT ARE REQUIRED IN SUBCLASSES

   deploy
       See "deploy" in DBIx::Class::DeploymentHandler::HandlesDeploy.

   version_storage_is_installed
       See "version_storage_is_installed" in
       DBIx::Class::DeploymentHandler::HandlesVersionStorage.

   add_database_version
       See "add_database_version" in DBIx::Class::DeploymentHandler::HandlesVersionStorage.

   delete_database_version
       See "delete_database_version" in DBIx::Class::DeploymentHandler::HandlesVersionStorage.

   next_version_set
       See "next_version_set" in DBIx::Class::DeploymentHandler::HandlesVersioning.

   previous_version_set
       See "previous_version_set" in DBIx::Class::DeploymentHandler::HandlesVersioning.

   upgrade_single_step
       See "upgrade_single_step" in DBIx::Class::DeploymentHandler::HandlesDeploy.

   downgrade_single_step
       See "downgrade_single_step" in DBIx::Class::DeploymentHandler::HandlesDeploy.

   txn_do
       See "txn_do" in DBIx::Class::DeploymentHandler::HandlesDeploy.

ORTHODOX METHODS

       These methods are not actually required as things will probably still work if you don't
       implement them, but if you want your subclass to get along with other subclasses (or more
       likely, tools made to use another subclass), you should probably implement these too, even
       if they are no-ops.

   database_version
       see "database_version" in DBIx::Class::DeploymentHandler::HandlesVersionStorage

   prepare_deploy
       see "prepare_deploy" in DBIx::Class::DeploymentHandler::HandlesDeploy

   prepare_resultsource_install
       see "prepare_resultsource_install" in DBIx::Class::DeploymentHandler::HandlesDeploy

   install_resultsource
       see "install_resultsource" in DBIx::Class::DeploymentHandler::HandlesDeploy

   prepare_upgrade
       see "prepare_upgrade" in DBIx::Class::DeploymentHandler::HandlesDeploy

   prepare_downgrade
       see "prepare_downgrade" in DBIx::Class::DeploymentHandler::HandlesDeploy

   SUBCLASSING
       All of the methods mentioned in "METHODS THAT ARE REQUIRED IN SUBCLASSES" and "ORTHODOX
       METHODS" can be implemented in any fashion you choose.  In the spirit of code reuse I have
       used roles to implement them in my two subclasses, DBIx::Class::DeploymentHandler and
       DBIx::Class::DeploymentHandler::Deprecated, but you are free to implement them entirely in
       a subclass if you so choose to.

       For in-depth documentation on how methods are supposed to work, see the roles
       DBIx::Class::DeploymentHandler::HandlesDeploy,
       DBIx::Class::DeploymentHandler::HandlesVersioning, and
       DBIx::Class::DeploymentHandler::HandlesVersionStorage.

ATTRIBUTES

   schema
       The DBIx::Class::Schema (required) that is used to talk to the database and generate the
       DDL.

   schema_version
       The version that the schema is currently at.  Defaults to "$self->schema->schema_version".

   backup_directory
       The directory where backups are stored

   to_version
       The version (defaults to schema's version) to migrate the database to

METHODS

   install
        $dh->install

       or

        $dh->install({ version => 1 })

       Deploys the requested version into the database  Version defaults to "schema_version".
       Populates "version_storage" with "version" and "ddl".

       Note: you typically need to call "$dh->prepare_deploy" before you call this method.

       Note: you cannot install on top of an already installed database

   upgrade
        $dh->upgrade

       Upgrades the database one step at a time till "next_version_set" returns "undef".  Each
       upgrade step will add a "version", "ddl", and "upgrade_sql" to the version storage (if
       "ddl" and/or "upgrade_sql" are returned from "upgrade_single_step".

   downgrade
        $dh->downgrade

       Downgrades the database one step at a time till "previous_version_set" returns "undef".
       Each downgrade step will delete a "version" from the version storage.

   backup
        $dh->backup

       Simply calls backup on the "$schema->storage", passing in "$self->backup_directory" as an
       argument.  Please test yourself before assuming it will work.

AUTHOR

       Arthur Axel "fREW" Schmidt <frioux+cpan@gmail.com>

COPYRIGHT AND LICENSE

       This software is copyright (c) 2018 by Arthur Axel "fREW" Schmidt.

       This is free software; you can redistribute it and/or modify it under the same terms as
       the Perl 5 programming language system itself.