X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FCatalyst%2FManual%2FTutorial%2FCatalystBasics.pod;h=d1303bbc2e33804097630f35e8c3d06cd2955d10;hb=f2c10d65222a90ee666a98daeff0120508061b52;hp=db00bcee7ec2c3bb8fdaa98028f16e665a7a86cd;hpb=13852f978caf002dab00728e7f6d03c30c3c9560;p=catagits%2FCatalyst-Runtime.git

diff --git a/lib/Catalyst/Manual/Tutorial/CatalystBasics.pod b/lib/Catalyst/Manual/Tutorial/CatalystBasics.pod
index db00bce..d1303bb 100644
--- a/lib/Catalyst/Manual/Tutorial/CatalystBasics.pod
+++ b/lib/Catalyst/Manual/Tutorial/CatalystBasics.pod
@@ -45,7 +45,7 @@ L<Advanced CRUD|Catalyst::Manual::Tutorial::AdvancedCRUD>
 
 =item 9
 
-L<Appendices|Catalyst::Manual::Tutorial::Appendicies>
+L<Appendices|Catalyst::Manual::Tutorial::Appendices>
 
 =back
 
@@ -103,18 +103,18 @@ to persist and restore objects to/from a relational database.
 
 =back
 
-B<TIP>: Note that all of the code for this part of the tutorial can be
-pulled from the Catalyst Subversion repository in one step with the
-following command:
-
-    svn checkout http://dev.catalyst.perl.org/repos/Catalyst/trunk/examples/Tutorial@4609 .
-
+You can checkout the source code for this example from the catalyst
+subversion repository as per the instructions in
+L<Catalyst::Manual::Tutorial::Intro>
 
 =head1 CREATE A CATALYST PROJECT
 
 Catalyst provides a number of helper scripts that can be used to quickly
 flesh out the basic structure of your application. All Catalyst projects
-begin with the C<catalyst.pl> helper.
+begin with the C<catalyst.pl> helper (see L<Catalyst::Helper|Catalyst::Helper>
+for more information on helpers).  Also note that as of Catalyst 5.7000,
+you will not have the helper scripts unless you install both 
+L<Catalyst::Runtime|Catalyst::Runtime> and L<Catalyst::Devel|Catalyst::Devel>.
 
 In the case of this tutorial, use the Catalyst C<catalyst.pl> script to
 initialize the framework for an application called C<MyApp>:
@@ -139,13 +139,14 @@ application with the built-in development web server:
     [debug] Debug messages enabled
     [debug] Loaded plugins:
     .----------------------------------------------------------------------------.
-    | Catalyst::Plugin::ConfigLoader  0.06                                       |
+    | Catalyst::Plugin::ConfigLoader  0.13                                       |
     | Catalyst::Plugin::Static::Simple  0.14                                     |
     '----------------------------------------------------------------------------'
     
     [debug] Loaded dispatcher "Catalyst::Dispatcher"
     [debug] Loaded engine "Catalyst::Engine::HTTP"
-    [debug] Found home "/root/dev/MyApp"
+    [debug] Found home "/home/me/MyApp"
+    [debug] Loaded Config "/home/me/myapp.yml"
     [debug] Loaded components:
     .-----------------------------------------------------------------+----------.
     | Class                                                           | Type     |
@@ -161,8 +162,13 @@ application with the built-in development web server:
     | /end                 | MyApp::Controller::Root              | end          |
     '----------------------+--------------------------------------+--------------'
     
-    [info] MyApp powered by Catalyst 5.7000
-    You can connect to your server at http://localhost.localdomain:3000
+    [info] MyApp powered by Catalyst 5.7002
+    You can connect to your server at http://localhost:3000
+
+B<NOTE>: Be sure you run the C<script/myapp_server.pl> command from the
+'base' directory of your application, not inside the C<script> directory 
+itself.  It doesn't make a difference at this point, but it will as soon
+as we get the database going in the next section.
 
 Point your web browser to L<http://localhost:3000> (substituting a 
 different hostname or IP address as appropriate) and you should be 
@@ -170,14 +176,14 @@ greeted by the Catalyst welcome screen.  Information similar to the
 following should be appended to the logging output of the development 
 server:
 
-    [info] *** Request 1 (0.008/s) [2822] [Mon Jul  3 12:42:43 2006] ***
+    [info] *** Request 1 (0.043/s) [6003] [Fri Jul  7 13:32:53 2006] ***
     [debug] "GET" request for "/" from "127.0.0.1"
-    [info] Request took 0.154781s (6.461/s)
+    [info] Request took 0.067675s (14.777/s)
     .----------------------------------------------------------------+-----------.
     | Action                                                         | Time      |
     +----------------------------------------------------------------+-----------+
-    | /default                                                       | 0.069475s |
-    | /end                                                           | 0.085305s |
+    | /default                                                       | 0.002844s |
+    | /end                                                           | 0.000207s |
     '----------------------------------------------------------------+-----------'
 
 Press Ctrl-C to break out of the development server.
@@ -222,7 +228,7 @@ in your editor and enter:
     INSERT INTO authors VALUES (4, 'Richard', 'Stevens');
     INSERT INTO authors VALUES (5, 'Douglas', 'Comer');
     INSERT INTO authors VALUES (6, 'Tom', 'Christiansen');
-    INSERT INTO authors VALUES (7, ' Nathan', 'Torkington');
+    INSERT INTO authors VALUES (7, 'Nathan', 'Torkington');
     INSERT INTO authors VALUES (8, 'Jeffrey', 'Zeldman');
     INSERT INTO book_authors VALUES (1, 1);
     INSERT INTO book_authors VALUES (1, 2);
@@ -394,7 +400,7 @@ Perl ORM engine, Matt Trout's L<DBIx::Class|DBIx::Class> (abbreviated
 as "DBIC") has rapidly emerged as the Perl-based ORM technology of choice.  
 Most new Catalyst applications rely on DBIC, as will this tutorial.
 
-Note: See L<Catalyst:: Model::CDBI> for more information on using
+Note: See L<Catalyst::Model::CDBI> for more information on using
 Catalyst with L<Class::DBI|Class::DBI>.
 
 =head2 Create a DBIC Schema File
@@ -436,6 +442,10 @@ B<Note:> C<__PACKAGE__> is just a shorthand way of referencing the name
 of the package where it is used.  Therefore, in C<MyAppDB.pm>,
 C<__PACKAGE__> is equivalent to C<MyAppDB>.
 
+B<Note:> As with any Perl package, we need to end the last line with
+a statement that evaluates to C<true>.  This is customarily done with
+C<1> on a line by itself as shown above.
+
 
 =head2 Create the DBIC "Result Source" Files
 
@@ -693,7 +703,8 @@ to the controller:
         $c->stash->{books} = [$c->model('MyAppDB::Book')->all];
         
         # Set the TT template to use.  You will almost always want to do this
-        # in your action methods.
+        # in your action methods (actions methods respond to user input in
+        # your controllers).
         $c->stash->{template} = 'books/list.tt2';
     }
 
@@ -728,7 +739,7 @@ include Mason (L<http://www.masonhq.com> and
 L<http://www.masonbook.com>) and L<HTML::Template|HTML::Template>
 (L<http://html-template.sourceforge.net>).
 
-=head2 Create a Catalyst View Using C<TTSITE>
+=head2 Create a Catalyst View Using C<TTSite>
 
 When using TT for the Catalyst view, there are two main helper scripts:
 
@@ -788,7 +799,7 @@ Catalyst C<c> variable.)
 B<TIP>: When troubleshooting TT it can be helpful to enable variable
 C<DEBUG> options.  You can do this in a Catalyst environment by adding
 a C<DEBUG> line to the C<__PACKAGE__->config> declaration in 
-C<MyApp/View/TT.pm>:
+C<lib/MyApp/View/TT.pm>:
 
     __PACKAGE__->config({
         CATALYST_VAR => 'Catalyst',
@@ -803,6 +814,12 @@ L<Template::Constants> for more information (remove the C<DEBUG_>
 portion of the name shown in the TT docs and convert to lower case
 for use inside Catalyst).
 
+B<NOTE:> Please be sure to disable TT debug options before 
+continuing the tutorial (especially the 'undef' option -- leaving
+this enabled will conflict with several of the conventions used
+by this tutorial and TTSite to leave some variables undefined
+on purpose).
+
 
 =head2 Using C<RenderView> for the Default View
 
@@ -872,9 +889,10 @@ Older Catalyst-related documents often suggest that you add a "private
 end action" to your application class (C<MyApp.pm>) or Root.pm 
 (C<MyApp/Controller/Root.pm>).  These examples should be easily 
 converted to L<RenderView|Catalyst::Action::RenderView> by simply adding 
-C<ActionClass('RenderView')> to the C<sub end> definition. If end sub is 
-defined in your application class (C<MyApp.pm>), you should also migrate 
-it to C<MyApp/Controller/Root.pm>.
+the attribute C<:ActionClass('RenderView')> to the C<sub end> 
+definition. If end sub is defined in your application class 
+(C<MyApp.pm>), you should also migrate it to 
+C<MyApp/Controller/Root.pm>.
 
 =item *
 
@@ -886,7 +904,8 @@ that C<DefaultEnd> be added to the list of plugins in C<lib/MyApp.pm>.
 It also allowed you to add "dump_info=1" (precede with "?" or "&" 
 depending on where it is in the URL) to I<force> the debug screen at the 
 end of the Catalyst request processing cycle.  However, it was more 
-difficult to extend the C<RenderView> mechanism, and is now deprecated.
+difficult to extend than the C<RenderView> mechanism, and is now 
+deprecated.
 
 =item *
 
@@ -970,13 +989,16 @@ Then open C<root/src/books/list.tt2> in your editor and enter:
         <td>
           [% # First initialize a TT variable to hold a list.  Then use a TT FOREACH -%]
           [% # loop in 'side effect notation' to load just the last names of the     -%]
-          [% # authors into the list.  Note that we make a bogus assignment to the   -%]
-          [% # 'unused' vbl to avoid printing the size of the list after each push.  -%]      
+          [% # authors into the list.  Note that the 'push' TT vmethod does not      -%]
+          [% # a value, so nothing will be printed here.  But, if you have something -%]
+          [% # in TT that does return a method and you don't want it printed, you    -%]
+          [% # can: 1) assign it to a bogus value, or 2) use the CALL keyword to     -%]
+          [% # call it and discard the return value.                                 -%]
           [% tt_authors = [ ];
-             unused = tt_authors.push(author.last_name) FOREACH author = book.authors %]
+             tt_authors.push(author.last_name) FOREACH author = book.authors %]
           [% # Now use a TT 'virtual method' to display the author count in parens   -%]
           ([% tt_authors.size %])
-          [% # Use another vmethod to join & print the names with comma separators   -%]
+          [% # Use another TT vmethod to join & print the names & comma separators   -%]
           [% tt_authors.join(', ') %]
         </td>
       </tr>
@@ -1016,7 +1038,11 @@ First, let's enable an environment variable option that causes
 DBIx::Class to dump the SQL statements it's using to access the database
 (this option can provide extremely helpful troubleshooting information):
 
-    $ export DBIX_CLASS_STORAGE_DBI_DEBUG=1
+    $ export DBIC_TRACE=1
+
+B<NOTE>: You can also use the older 
+C<export DBIX_CLASS_STORAGE_DBI_DEBUG=1>, that that's a lot more to
+type.
 
 This assumes you are using BASH as your shell -- adjust accordingly if
 you are using a different shell (for example, under tcsh, use
@@ -1038,14 +1064,15 @@ Your development server log output should display something like:
     [debug] Debug messages enabled
     [debug] Loaded plugins:
     .----------------------------------------------------------------------------.
-    | Catalyst::Plugin::ConfigLoader  0.06                                       |
-    | Catalyst::Plugin::StackTrace  0.04                                         |
+    | Catalyst::Plugin::ConfigLoader  0.13                                       |
+    | Catalyst::Plugin::StackTrace  0.06                                         |
     | Catalyst::Plugin::Static::Simple  0.14                                     |
     '----------------------------------------------------------------------------'
     
     [debug] Loaded dispatcher "Catalyst::Dispatcher"
     [debug] Loaded engine "Catalyst::Engine::HTTP"
     [debug] Found home "/home/me/MyApp"
+    [debug] Loaded Config "/home/me/myapp.yml"
     [debug] Loaded components:
     .-----------------------------------------------------------------+----------.
     | Class                                                           | Type     |
@@ -1076,8 +1103,8 @@ Your development server log output should display something like:
     | /books/list                         | /books/list                          |
     '-------------------------------------+--------------------------------------'
     
-    [info] MyApp powered by Catalyst 5.7000
-    You can connect to your server at http://localhost.localdomain:3000
+    [info] MyApp powered by Catalyst 5.7002
+    You can connect to your server at http://localhost:3000
 
 Some things you should note in the output above:
 
@@ -1124,12 +1151,90 @@ You should see 5 such lines of debug output as DBIC fetches the author
 information for each book.
 
 
+=head1 USING THE DEFAULT TEMPLATE NAME
+
+By default, C<Catalyst::View::TT> will look for a template that uses the 
+same name as your controller action, allowing you to save the step of 
+manually specifying the template name in each action.  For example, this 
+would allow us to remove the 
+C<$c-E<gt>stash-E<gt>{template} = 'books/list.tt2';> line of our 
+C<list> action in the Books controller.  Open 
+C<lib/MyApp/Controller/Books.pm> in your editor and comment out this line
+to match the following (only the C<$c-E<gt>stash-E<gt>{template}> line
+has changed):
+
+    =head2 list
+    
+    Fetch all book objects and pass to books/list.tt2 in stash to be displayed
+    
+    =cut
+    
+    sub list : Local {
+        # Retrieve the usual perl OO '$self' for this object. $c is the Catalyst
+        # 'Context' that's used to 'glue together' the various components
+        # that make up the application
+        my ($self, $c) = @_;
+    
+        # Retrieve all of the book records as book model objects and store in the
+        # stash where they can be accessed by the TT template
+        $c->stash->{books} = [$c->model('MyAppDB::Book')->all];
+    
+        # Set the TT template to use.  You will almost always want to do this
+        # in your action methods (actions methods respond to user input in
+        # your controllers).
+        #$c->stash->{template} = 'books/list.tt2';
+    }
+
+C<Catalyst::View::TT> defaults to looking for a template with no 
+extension.  In our case, we need to override this to look for an 
+extension of C<.tt2>.  Open C<lib/MyApp/View/TT.pm> and add the 
+C<TEMPLATE_EXTENSION> definition as follows:
+
+    __PACKAGE__->config({
+        CATALYST_VAR => 'Catalyst',
+        INCLUDE_PATH => [
+            MyApp->path_to( 'root', 'src' ),
+            MyApp->path_to( 'root', 'lib' )
+        ],
+        PRE_PROCESS  => 'config/main',
+        WRAPPER      => 'site/wrapper',
+        ERROR        => 'error.tt2',
+        TIMER        => 0,
+        TEMPLATE_EXTENSION => '.tt2',
+    });
+
+You should now be able to restart the development server as per the 
+previous section and access the L<http://localhost:3000/books/list>
+as before.
+
+B<NOTE:> Please note that if you use the default template technique,
+you will B<not> be able to use either the C<$c-E<gt>forward> or
+the C<$c-E<gt>detach> mechanisms (these are discussed in Part 2 and 
+Part 8 of the Tutorial).
+
+
+=head1 RETURN TO A MANUALLY SPECIFIED TEMPLATE
+
+In order to be able to use C<$c-E<gt>forward> and C<$c-E<gt>detach>
+later in the tutorial, you should remove the comment from the
+statement in C<sub list>:
+
+    $c->stash->{template} = 'books/list.tt2';
+
+Then delete the C<TEMPLATE_EXTENSION> line in  
+C<lib/MyApp/View/TT.pm>.
+
+You should then be able to restart the development server and 
+access L<http://localhost:3000/books/list> in the same manner as
+with earlier sections.
+
+
 =head1 AUTHOR
 
 Kennedy Clark, C<hkclark@gmail.com>
 
 Please report any errors, issues or suggestions to the author.  The
-most recent version of the Catlayst Tutorial can be found at
+most recent version of the Catalyst Tutorial can be found at
 L<http://dev.catalyst.perl.org/repos/Catalyst/trunk/Catalyst-Runtime/lib/Catalyst/Manual/Tutorial/>.
 
 Copyright 2006, Kennedy Clark, under Creative Commons License