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Justin Hunter > DBIx-Class-0.08126 > DBIx::Class::Optional::Dependencies



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Source   Latest Release: DBIx-Class-0.082841


DBIx::Class::Optional::Dependencies - Optional module dependency specifications (for module authors)


Somewhere in your build-file (e.g. Module::Install's Makefile.PL):


  configure_requires 'DBIx::Class' => '0.08126';

  require DBIx::Class::Optional::Dependencies;

  my $deploy_deps = DBIx::Class::Optional::Dependencies->req_list_for('deploy');

  for (keys %$deploy_deps) {
    requires $_ => $deploy_deps->{$_};


Note that there are some caveats regarding configure_requires(), more info can be found at "configure_requires" in Module::Install


Some of the less-frequently used features of DBIx::Class have external module dependencies on their own. In order not to burden the average user with modules he will never use, these optional dependencies are not included in the base Makefile.PL. Instead an exception with a descriptive message is thrown when a specific feature is missing one or several modules required for its operation. This module is the central holding place for the current list of such dependencies, for DBIx::Class core authors, and DBIx::Class extension authors alike.


Dependencies are organized in groups and each group can list one or more required modules, with an optional minimum version (or 0 for any version). The group name can be used in the


Modules required for the DBIx::Class administrative library

Requirement group: admin


Modules required for the CLI DBIx::Class interface dbicadmin

Requirement group: admin_script


Modules required for "deploy" in DBIx::Class::Storage::DBI and "deployment_statements" in DBIx::Class::Storage::DBI

Requirement group: deploy

Sybase ASE support

Modules required to connect to Sybase ASE

Requirement group: rdbms_ase

DB2 support

Modules required to connect to DB2

Requirement group: rdbms_db2

MSSQL support via DBD::ODBC

Modules required to connect to MSSQL via DBD::ODBC

Requirement group: rdbms_mssql_odbc

MSSQL support via DBD::Sybase

Modules required to connect to MSSQL support via DBD::Sybase

Requirement group: rdbms_mssql_sybase

MySQL support

Modules required to connect to MySQL

Requirement group: rdbms_mysql

Oracle support

Modules required to connect to Oracle

Requirement group: rdbms_oracle

PostgreSQL support

Modules required to connect to PostgreSQL

Requirement group: rdbms_pg

SQLite support

Modules required to connect to SQLite

Requirement group: rdbms_sqlite


Modules required for DBIx::Class::Storage::DBI::Replicated

Requirement group: replicated



Arguments: none
Returns: \%list_of_requirement_groups

This method should be used by DBIx::Class packagers, to get a hashref of all dependencies keyed by dependency group. Each key (group name) can be supplied to one of the group-specific methods below.


Arguments: $group_name
Returns: \%list_of_module_version_pairs

This method should be used by DBIx::Class extension authors, to determine the version of modules a specific feature requires in the current version of DBIx::Class. See the "SYNOPSIS" for a real-world example.


Arguments: $group_name
Returns: 1|0

Returns true or false depending on whether all modules required by $group_name are present on the system and loadable.


Arguments: $group_name
Returns: $error_message_string

Returns a single line string suitable for inclusion in larger error messages. This method would normally be used by DBIx::Class core-module author, to indicate to the user that he needs to install specific modules before he will be able to use a specific feature.

For example if some of the requirements for deploy are not available, the returned string could look like:

 SQL::Translator >= 0.11006 (see DBIx::Class::Optional::Dependencies for details)

The author is expected to prepend the necessary text to this message before returning the actual error seen by the user.


Arguments: $group_name
Returns: \%list_of_loaderrors_per_module

Returns a hashref containing the actual errors that occured while attempting to load each module in the requirement group.


See "CONTRIBUTORS" in DBIx::Class.


You may distribute this code under the same terms as Perl itself

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