1 package SL::DB::Helper::Manager;
7 use Rose::DB::Object::Manager;
8 use base qw(Rose::DB::Object::Manager);
10 sub make_manager_methods {
12 my @params = scalar(@_) ? @_ : qw(all);
13 return $class->SUPER::make_manager_methods(@params);
20 return $class->get_all(query => [ @_ ], limit => 1)->[0];
23 sub find_by_or_create {
28 $found = $class->find_by(@_);
31 return defined $found ? $found : $class->object_class->new;
42 my $manager_class = shift;
43 my $class = $manager_class;
44 $class =~ s{Manager::}{};
46 croak "Caching can only be used with classes with exactly one primary key column" if 1 != scalar(@{ $class->meta->primary_key_columns });
48 my $all_have_been_cached = $::request->cache("::SL::DB::Manager::cache_all");
49 return if $all_have_been_cached->{$class};
51 $all_have_been_cached->{$class} = 1;
53 my $item_cache = $::request->cache("::SL::DB::Object::object_cache::${class}");
54 my $primary_key = $class->meta->primary_key_columns->[0]->name;
55 my $objects = $class->_get_manager_class->get_all;
57 $item_cache->{$_->$primary_key} = $_ for @{ $objects};
69 SL::DB::Helper::Manager - Base class & helper functions for all Rose manager classes
77 Pre-caches all items from a table. Use this is you expect to need all
78 items from a table. You can retrieve them later with the
79 C<load_cached> function from the corresponding Rose DB object class.
81 For example, if you expect to need all unit objects, you can use
82 C<SL::DB::Manager::Unit-E<gt>cache_all> before you start the actual
83 work. Later you can use C<SL::DB::Unit-E<gt>load_cached> to retrieve
84 individual objects and be sure that they're already cached.
86 =item C<find_by @where>
88 Retrieves one item from the corresponding table matching the
89 conditions given in C<@where>.
91 This is shorthand for the following call:
93 SL::DB::Manager::SomeClass->get_all(where => [ … ], limit => 1)
95 =item C<find_by_or_create @where>
97 This calls L</find_by> with C<@where> and returns its result if one is
100 If none is found, a new instance of the corresponding DB object class
101 is created and returned. Such a new object is not inserted into the
102 database automatically.
104 =item C<get_first @args>
106 Retrieves the first item from the database by calling C<get_all> with
107 a limit of 1. The C<@args> are passed through to C<get_all> allowing
108 for arbitrary filters and sort options to be applied.
110 =item C<make_manager_methods [@method_list]>
112 Calls Rose's C<make_manager_methods> with the C<@method_list> or
113 C<all> if no methods are given.
123 Moritz Bunkus E<lt>m.bunkus@linet-services.deE<gt>