erl_migrate

A tool to upgrade/downgrade schema and migrate data of an erlang app's database(s)

Installation

• run make deps to install depedencies
• run make to compile code
• run make eunit to test UT's

Usage

• Data structure of Argument Args is a map

   #{
      schema_name => NameOfSchema,
      migration_src_files_path => SrcFilePath,
      migration_beam_files_path => BeamFilePath,
      schema_instance => SchemaInstanceName,
      down_base_migration => boolean()
   }

• create migration file

Args = 
   #{
      schema_name => schema_name_1, 
      migration_src_files_path => "apps/app_name/src/migrations",
      migration_beam_files_path => "/opt/app_name/ebin"
   }
erl_migrate:create_migration_file(Args).

• apply upgrade

Args =
   #{schema_name => schema_name_1, schema_instance => schema_instance_1},
erl_migrate:apply_upgrades(Args).

• apply downgrade

Args =
   #{schema_name => schema_name_1, schema_instance_1},
erl_migrate:apply_downgrades(Args, Num).

• detect revision seq conflicts

Args =
   #{schema_name => schema_name_1},
erl_migrate:detect_revision_sequence_conflicts(Args, Num).

• To enable print statements of library, add {debug, true} in sys.config under erl_migrate app config section

License

MIT License