A tool to upgrade/downgrade schema and migrate data of an erlang app's database(s)
- run
make depsto install depedencies - run
maketo compile code - run
make eunitto test UT's
- Data structure of Argument
Argsis 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
MIT License
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