NAME

       Rose::DB::Object::Metadata::Relationship::OneToMany - One to many table relationship
       metadata object.

SYNOPSIS

         use Rose::DB::Object::Metadata::Relationship::OneToMany;

         $rel = Rose::DB::Object::Metadata::Relationship::OneToMany->new(...);
         $rel->make_methods(...);
         ...

DESCRIPTION

       Objects of this class store and manipulate metadata for relationships in which a single
       row from one table refers to multiple rows in another table.

       This class inherits from Rose::DB::Object::Metadata::Relationship. Inherited methods that
       are not overridden will not be documented a second time here.  See the
       Rose::DB::Object::Metadata::Relationship documentation for more information.

METHOD MAP

       "count"
           Rose::DB::Object::MakeMethods::Generic, objects_by_key, "interface => 'count'" ...

       "find"
           Rose::DB::Object::MakeMethods::Generic, objects_by_key, "interface => 'find'" ...

       "iterator"
           Rose::DB::Object::MakeMethods::Generic, objects_by_key, "interface => 'iterator'" ...

       "get_set"
           Rose::DB::Object::MakeMethods::Generic, objects_by_key, "interface => 'get_set'" ...

       "get_set_now"
           Rose::DB::Object::MakeMethods::Generic, objects_by_key, "interface => 'get_set_now'"
           ...

       "get_set_on_save"
           Rose::DB::Object::MakeMethods::Generic, objects_by_key, "interface =>
           'get_set_on_save'" ...

       "add_now"
           Rose::DB::Object::MakeMethods::Generic, objects_by_key, "interface => 'add_now'" ...

       "add_on_save"
           Rose::DB::Object::MakeMethods::Generic, objects_by_key, "interface => 'add_on_save'"
           ...

       See the Rose::DB::Object::Metadata::Relationship documentation for an explanation of this
       method map.

CLASS METHODS

       default_auto_method_types [TYPES]
           Get or set the default list of auto_method_types.  TYPES should be a list of
           relationship method types.  Returns the list of default relationship method types (in
           list context) or a reference to an array of the default relationship method types (in
           scalar context).  The default list contains "find", "get_set_on_save", and
           "add_on_save".

OBJECT METHODS

       build_method_name_for_type TYPE
           Return a method name for the relationship method type TYPE.

           For the method types "get_set", "get_set_now", and "get_set_on_save", the
           relationship's name is returned.

           For the method types "add_now" and "add_on_save", the relationship's name prefixed
           with "add_" is returned.

           For the method type "find", the relationship's name prefixed with "find_" is returned.

           For the method type "count", the relationship's name suffixed with "_count" is
           returned.

           For the method type "iterator", the relationship's name suffixed with "_iterator" is
           returned.

           Otherwise, undef is returned.

       is_singular
           Returns false.

       manager_class [CLASS]
           Get or set the name of the Rose::DB::Object::Manager-derived class used to fetch
           objects.  The make_methods method will use Rose::DB::Object::Manager if this value is
           left undefined.

           Note: when the name of a relationship that has "manager_args" is used in a
           Rose::DB::Object::Manager with_objects or require_objects parameter value, only the
           sort_by argument will be copied from "manager_args" and incorporated into the query.

       manager_method [METHOD]
           Get or set the name of the manager_class class method to call when fetching objects.
           The make_methods method will use get_objects if this value is left undefined.

       manager_count_method [METHOD]
           Get or set the name of the manager_class class method to call when counting objects.
           The make_methods method will use get_objects_count if this value is left undefined.

       manager_iterator_method [METHOD]
           Get or set the name of the manager_class class method to call when creating an
           iterator.  The make_methods method will use get_objects_iterator if this value is left
           undefined.

       manager_args [HASHREF]
           Get or set a reference to a hash of name/value arguments to pass to the manager_method
           when fetching objects.  For example, this can be used to enforce a particular sort
           order for objects fetched via this relationship.  For example:

             Product->meta->add_relationship
             (
               code_names =>
               {
                 type         => 'one to many',
                 class        => 'CodeName',
                 column_map   => { id => 'product_id' },
                 manager_args =>
                 {
                   sort_by => CodeName->meta->table . '.name',
                 },
               },
             );

           This would ensure that a "Product"'s "code_names()" are listed in alphabetical order.
           Note that the "name" column is prefixed by the name of the table fronted by the
           "CodeName" class.  This is important because several tables may have a column named
           "name."  If this relationship is used to form a JOIN in a query along with one of
           those tables, then the "name" column will be ambiguous.  Adding a table name prefix
           disambiguates the column name.

           Also note that the table name is not hard-coded.  Instead, it is fetched from the
           Rose::DB::Object-derived class that fronts the table.  This is more verbose, but is a
           much better choice than including the literal table name when it comes to long-term
           maintenance of the code.

           See the documentation for Rose::DB::Object::Manager's get_objects method for a full
           list of valid arguments for use with the "manager_args" parameter, but remember that
           you can define your own custom manager_class and thus can also define what kinds of
           arguments "manager_args" will accept.

       map_column LOCAL [, FOREIGN]
           If passed a local column name LOCAL, return the corresponding column name in the
           foreign table.  If passed both a local column name LOCAL and a foreign column name
           FOREIGN, set the local/foreign mapping and return the foreign column name.

       column_map [HASH | HASHREF]
           Get or set a reference to a hash that maps local column names to foreign column names.

       query_args [ARRAYREF]
           Get or set a reference to an array of query arguments to add to the query passed to
           the manager_method when fetching objects.

       type
           Returns "one to many".

AUTHOR

       John C. Siracusa (siracusa@gmail.com)

LICENSE

       Copyright (c) 2010 by John C. Siracusa.  All rights reserved.  This program is free
       software; you can redistribute it and/or modify it under the same terms as Perl itself.

perl v5.36.0                             Rose::DB::Object::Metadata::Relationship::OneToMany(3pm)