X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FManual%2FComponent.pod;h=46170f9c2bddb4fb506b21c468e9481aac17e4fd;hb=8278b5128660bf9b4d7fb028d47429fcc5a46a99;hp=9c13932e728ba65e69d90d601c11f3cfe47e3634;hpb=88ac5c8b0eaabf0e0b2e3cc439d8c8635a325b36;p=dbsrgits%2FDBIx-Class.git diff --git a/lib/DBIx/Class/Manual/Component.pod b/lib/DBIx/Class/Manual/Component.pod index 9c13932..46170f9 100644 --- a/lib/DBIx/Class/Manual/Component.pod +++ b/lib/DBIx/Class/Manual/Component.pod @@ -12,31 +12,29 @@ itself creates, after the insert has happened. =head1 USING -Components are loaded using the load_components() method within your +Components are loaded using the load_components() method within your DBIx::Class classes. package My::Thing; - use base qw( DBIx::Class ); - __PACKAGE__->load_components(qw/ PK::Auto Core /); + use base qw( DBIx::Class::Core ); + __PACKAGE__->load_components(qw/InflateColumn::DateTime TimeStamp/); -Generally you do not want to specify the full package name -of a component, instead take off the DBIx::Class:: part of -it and just include the rest. If you do want to load a -component outside of the normal namespace you can do so +Generally you do not want to specify the full package name +of a component, instead take off the DBIx::Class:: part of +it and just include the rest. If you do want to load a +component outside of the normal namespace you can do so by prepending the component name with a +. __PACKAGE__->load_components(qw/ +My::Component /); -Once a component is loaded all of it's methods, or otherwise, +Once a component is loaded all of it's methods, or otherwise, that it provides will be available in your class. -The order in which is you load the components may be -very important, depending on the component. The general -rule of thumb is to first load extra components and then -load core ones last. If you are not sure, then read the -docs for the components you are using and see if they -mention anything about the order in which you should load -them. +The order in which is you load the components may be very +important, depending on the component. If you are not sure, +then read the docs for the components you are using and see +if they mention anything about the order in which you should +load them. =head1 CREATING COMPONENTS @@ -47,11 +45,11 @@ Making your own component is very easy. # Create methods, accessors, load other components, etc. 1; -When a component is loaded it is included in the calling -class' inheritance chain using L. As well as -providing custom utility methods, a component may also -override methods provided by other core components, like -L and others. For example, you +When a component is loaded it is included in the calling +class' inheritance chain using L. As well as +providing custom utility methods, a component may also +override methods provided by other core components, like +L and others. For example, you could override the insert and delete methods. sub insert { @@ -59,29 +57,27 @@ could override the insert and delete methods. # Do stuff with $self, like set default values. return $self->next::method( @_ ); } - + sub delete { my $self = shift; # Do stuff with $self. return $self->next::method( @_ ); } -Now, the order that a component is loaded is very important. Components -that are loaded first are the first ones in the inheritance stack. So, if -you override insert() but the DBIx::Class::Row component is loaded first -then your insert() will never be called, since the DBIx::Class::Row insert() -will be called first. If you are unsure as to why a given method is not -being called try printing out the Class::C3 inheritance stack. - - print join ', ' => Class::C3::calculateMRO('YourClass::Name'); +Now, the order that a component is loaded is very important. Components +that are loaded first are the first ones in the inheritance stack. So, if +you override insert() but the DBIx::Class::Row component is loaded first +then your insert() will never be called, since the DBIx::Class::Row insert() +will be called first. If you are unsure as to why a given method is not +being called try printing out the current linearized MRO. -Check out the L docs for more information about inheritance. + print join ', ' => mro::get_linear_isa('YourClass::Name'); =head1 EXISTING COMPONENTS =head2 Extra -These components provide extra functionality beyond +These components provide extra functionality beyond basic functionality that you can't live without. L - Class::DBI Compatibility layer. @@ -98,30 +94,28 @@ L - Display the amount of time it takes to run queries L - Declare virtual columns that return random strings. -L - Force UTF8 (Unicode) flag on columns. - L - Implicit UUID columns. L - CRUD methods. =head2 Experimental -These components are under development, there interfaces may -change, they may not work, etc. So, use them if you want, but +These components are under development, their interfaces may +change, they may not work, etc. So, use them if you want, but be warned. L - Validate all data before submitting to your database. =head2 Core -These are the components that all, or nearly all, people will use -without even knowing it. These components provide most of +These are the components that all, or nearly all, people will use +without even knowing it. These components provide most of DBIx::Class' functionality. -L - Lets you build groups of accessors. - L - Loads various components that "most people" would want. +L - Lets you build groups of accessors. + L - Non-recommended classdata schema component. L - Automatically create objects from column data. @@ -132,8 +126,6 @@ L - Inter-table relationships. L - Provides a classdata table object and method proxies. -L - Hooks for Storable freeze/thaw. - L - Basic row methods. =head1 SEE ALSO