1Rose::DB::Object::MetadUastearR:o:CsRoeen:lt:arDtiBib:ou:ntOsebhdjiepPc:et:r:Ol:nMeDeTotocaOudnmaeet(na3t:)a:tRieolnationship::OneToOne(3)
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NAME

6       Rose::DB::Object::Metadata::Relationship::OneToOne - One to one table
7       relationship metadata object.
8

SYNOPSIS

10         use Rose::DB::Object::Metadata::Relationship::OneToOne;
11
12         $rel = Rose::DB::Object::Metadata::Relationship::OneToOne->new(...);
13         $rel->make_methods(...);
14         ...
15

DESCRIPTION

17       Objects of this class store and manipulate metadata for relationships
18       in which a single row from one table refers to a single row in another
19       table.
20
21       This class inherits from Rose::DB::Object::Metadata::Relationship.
22       Inherited methods that are not overridden will not be documented a
23       second time here.  See the Rose::DB::Object::Metadata::Relationship
24       documentation for more information.
25

METHOD MAP

27       "get_set"
28           Rose::DB::Object::MakeMethods::Generic, object_by_key, ...
29
30       "get_set_now"
31           Rose::DB::Object::MakeMethods::Generic, object_by_key, "interface
32           => 'get_set_now'"
33
34       "get_set_on_save"
35           Rose::DB::Object::MakeMethods::Generic, object_by_key, "interface
36           => 'get_set_on_save'"
37
38       "delete_now"
39           Rose::DB::Object::MakeMethods::Generic, object_by_key, "interface
40           => 'delete_now'"
41
42       "delete_on_save"
43           Rose::DB::Object::MakeMethods::Generic, object_by_key, "interface
44           => 'delete_on_save'"
45
46       See the Rose::DB::Object::Metadata::Relationship documentation for an
47       explanation of this method map.
48

CLASS METHODS

50       default_auto_method_types [TYPES]
51           Get or set the default list of auto_method_types.  TYPES should be
52           a list of relationship method types.  Returns the list of default
53           relationship method types (in list context) or a reference to an
54           array of the default relationship method types (in scalar context).
55           The default list contains "get_set_on_save" and "delete_on_save".
56

OBJECT METHODS

58       column_map [HASH | HASHREF]
59           Get or set a reference to a hash that maps local column names to
60           foreign column names.
61
62       build_method_name_for_type TYPE
63           Return a method name for the relationship method type TYPE.
64
65           For the method types "get_set", "get_set_now", and
66           "get_set_on_save", the relationship's name is returned.
67
68           For the method types "delete_now" and "delete_on_save", the
69           relationship's  name prefixed with "delete_" is returned.
70
71           Otherwise, undef is returned.
72
73       is_singular
74           Returns true.
75
76       foreign_key [FK]
77           Get or set the Rose::DB::Object::Metadata::ForeignKey object to
78           which this object delegates all responsibility.
79
80           One to one relationships encapsulate essentially the same
81           information as foreign keys.  If a foreign key object is stored in
82           this relationship object, then all compatible operations are passed
83           through to the foreign key object.  This includes making object
84           method(s) and adding or modifying the local-to-foreign column map.
85           In other words, if a foreign_key is set, the relationship object
86           simply acts as a proxy for the foreign key object.
87
88       manager_class [CLASS]
89           Get or set the name of the Rose::DB::Object::Manager-derived class
90           used to fetch the object.
91
92       manager_method [METHOD]
93           Get or set the name of the manager_class class method to call when
94           fetching the object.
95
96       manager_args [HASHREF]
97           Get or set a reference to a hash of name/value arguments to pass to
98           the manager_method when fetching the object.  See the documentation
99           for Rose::DB::Object::Manager's get_objects method for a full list
100           of valid arguments for use with the "manager_args" parameter.
101
102           Note: when the name of a relationship that has "manager_args" is
103           used in a Rose::DB::Object::Manager with_objects or require_objects
104           parameter value, only the sort_by argument will be copied from
105           "manager_args" and incorporated into the query.
106
107       map_column LOCAL [, FOREIGN]
108           If passed a local column name LOCAL, return the corresponding
109           column name in the foreign table.  If passed both a local column
110           name LOCAL and a foreign column name FOREIGN, set the local/foreign
111           mapping and return the foreign column name.
112
113       optional [BOOL]
114           This method is the mirror image of the required method.   Passing a
115           true value to this method is the same thing as setting required to
116           false, and vice versa.  Similarly, the return value is the logical
117           negation of required.
118
119       query_args [ARRAYREF]
120           Get or set a reference to an array of query arguments to add to the
121           query passed to the manager_method when fetching the object.
122
123       required [BOOL]
124           Get or set the boolean value that determines what happens when the
125           local columns in the column_map have defined values, but the object
126           they relate to is not found.  If true, a fatal error will occur
127           when the methods that fetch objects through this relationship are
128           called.  If false, then the methods will simply return undef.
129
130           The default is false if one or more of the local columns allow null
131           values or if the local columns in the column map are the same as
132           the primary key columns, true otherwise.
133
134       type
135           Returns "one to one".
136

AUTHOR

138       John C. Siracusa (siracusa@gmail.com)
139

LICENSE

141       Copyright (c) 2010 by John C. Siracusa.  All rights reserved.  This
142       program is free software; you can redistribute it and/or modify it
143       under the same terms as Perl itself.
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147perl v5.30.2             Rose::DB:2:0O2b0j-e0c4t-:0:6Metadata::Relationship::OneToOne(3)
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