NAME

       Rose::DB::Object::Metadata::Relationship::ManyToOne - Many to one table relationship metadata object.

SYNOPSIS

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

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

DESCRIPTION

       Objects of this class store and manipulate metadata for relationships in which a many rows in one table
       may refer to a single row 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

       "get_set"
           Rose::DB::Object::MakeMethods::Generic, object_by_key, ...

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

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

       "delete_now"
           Rose::DB::Object::MakeMethods::Generic, object_by_key, "interface => 'delete_now'"

       "delete_on_save"
           Rose::DB::Object::MakeMethods::Generic, object_by_key, "interface => 'delete_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
           "get_set_on_save" and "delete_on_save".

OBJECT METHODS

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

       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 "delete_now" and "delete_on_save", the relationship's  name prefixed with
           "delete_" is returned.

           Otherwise, undef is returned.

       foreign_key [FK]
           Get or set the Rose::DB::Object::Metadata::ForeignKey object to which this object delegates all
           responsibility.

           Many to one relationships encapsulate essentially the same information as foreign keys.  If a foreign
           key object is stored in this relationship object, then all compatible operations are passed through
           to the foreign key object.  This includes making object method(s) and adding or modifying the local-
           to-foreign column map.  In other words, if a foreign_key is set, the relationship object simply acts
           as a proxy for the foreign key object.

       is_singular
           Returns true.

       manager_class [CLASS]
           Get or set the name of the Rose::DB::Object::Manager-derived class used to fetch the object.

       manager_method [METHOD]
           Get or set the name of the manager_class class method to call when fetching the object.

       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_delete_method [METHOD]
           Get or set the name of the manager_class class method to call when deleting objects.  The
           make_methods method will use delete_objects 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
           the object.  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.

           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.

       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.

       object_args [HASHREF]
           Get or set a reference to a hash of name/value pairs to pass to the new method when constructing the
           related object.  This attribute conflicts with any use of the "manager_*" or "query_args" attributes.

       optional [BOOL]
           This method is the mirror image of the required method.   Passing a true value to this method is the
           same thing as setting required to false, and vice versa.  Similarly, the return value is the logical
           negation of required.

       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 the object.

       required [BOOL]
           Get or set the boolean value that determines what happens when the local columns in the column_map
           have defined values, but the object they relate to is not found.  If true, a fatal error will occur
           when the methods that fetch objects through this relationship are called.  If false, then the methods
           will simply return undef.

           The default is false if one or more of the local columns allow null values or if the local columns in
           the column map are the same as the primary key columns, true otherwise.

       type
           Returns "many to one".

       with_column_triggers [BOOL]
           Get or set a boolean value that indicates whether or not triggers should be added to the local
           columns in the column map in an attempt to keep related objects and local columns in sync.  Defaults
           to false.

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 v5.20.2                                       2015-Rose::DB::Object::Metadata::Relationship::ManyToOne(3pm)