X-Git-Url: https://git.decadent.org.uk/gitweb/?a=blobdiff_plain;f=lib%2FMaypole%2FModel%2FCDBI.pm;h=6ae19f53fa12db0ee355dcebb6425e26b30fe256;hb=12d8a77a713d5ed4f08414e5f34e96d45f60e2d3;hp=83c118ae271e8eecd910d8f78c758a3d3da33a53;hpb=0b2bde3134a6580d38c4f555fa5a076ed24740cf;p=maypole.git

diff --git a/lib/Maypole/Model/CDBI.pm b/lib/Maypole/Model/CDBI.pm
index 83c118a..6ae19f5 100644
--- a/lib/Maypole/Model/CDBI.pm
+++ b/lib/Maypole/Model/CDBI.pm
@@ -1,12 +1,18 @@
 package Maypole::Model::CDBI;
 use base qw(Maypole::Model::Base Class::DBI);
-use Lingua::EN::Inflect::Number qw(to_PL);
 use Class::DBI::AsForm;
+# use Maypole::Form::CDBI;
+use CGI::Untaint;
+# use Maypole::Form;
+
 use Class::DBI::FromCGI;
+use Class::DBI::Loader;
 use Class::DBI::AbstractSearch;
 use Class::DBI::Plugin::RetrieveAll;
 use Class::DBI::Pager;
-use CGI::Untaint;
+
+use Lingua::EN::Inflect::Number qw(to_PL);
+
 use strict;
 
 =head1 NAME
@@ -15,88 +21,275 @@ Maypole::Model::CDBI - Model class based on Class::DBI
 
 =head1 DESCRIPTION
 
-This is a master model class which uses C<Class::DBI> to do all the hard
+This is a master model class which uses L<Class::DBI> to do all the hard
 work of fetching rows and representing them as objects. It is a good
 model to copy if you're replacing it with other database abstraction
 modules.
 
+It implements a base set of methods required for a Maypole Data Model.
+See L<Maypole::Model::Base> for these:
+
+=over 4
+
+=item adopt
+
+=item class_of
+
+=item do_edit
+
+=item list
+
+=item related
+
+=item setup_database
+
+=item fetch_objects
+
+=back 
+
+=head1 Additional Actions
+
+=over 
+
+=item delete
+
+Unsuprisingly, this command causes a database record to be forever lost.
+
+=item search
+
+The search action 
+
+=back
+
+=head1 Helper Methods
+
+=over 
+
+=item order
+
+=item stringify_column
+
+=item do_pager
+
+=item related_class
+
+Given an accessor name as a method, this function returns the class this accessor returns.
+
+=back
+
 =cut
 
 sub related {
-    my ($self, $r) = @_;
-    # Has-many methods; XXX this is a hack
-    map {to_PL($_)} 
-    grep { exists $r->{config}{ok_tables}{$_} }
-    map {$_->table}
-    keys %{shift->__hasa_list || {}}
+    my ( $self, $r ) = @_;
+    return keys %{ $self->meta_info('has_many') || {} };
 }
 
-sub do_edit :Exported {
-    my ($self, $r) = @_;
-    my $h = CGI::Untaint->new(%{$r->{params}});
-    my ($obj) = @{$r->objects};
-    if ($obj) {
-        # We have something to edit
-        $obj->update_from_cgi($h);
-        warn "Updating an object ($obj) with ".Dumper($h); use Data::Dumper;
-    } else {
-        $obj = $self->create_from_cgi($h);
-    }
-    if (my %errors = $obj->cgi_update_errors) {
+sub related_class {
+     my ( $self, $r, $accessor ) = @_;
+     my $meta = $self->meta_info;
+     my @rels = keys %$meta;
+     my $related;
+     foreach (@rels) {
+         $related = $meta->{$_}{$accessor};
+         last if $related;
+     }
+     return unless $related;
+
+     my $mapping = $related->{args}->{mapping};
+     if ( $mapping and @$mapping ) {
+       return $related->{foreign_class}->meta_info('has_a')->{$$mapping[0]}->{foreign_class};
+     }
+     else {
+         return $related->{foreign_class};
+     }
+ }
+
+
+sub do_edit : Exported 
+{
+    my ($self, $r, $obj) = @_;
+
+    my $config   = $r->config;
+    my $table    = $r->table;
+    
+    my $required_cols = $config->{$table}->{required_cols} || [];
+    
+    ($obj, my $fatal, my $creating) = $self->_do_update_or_create($r, $obj, $required_cols);
+    
+    # handle errors, if none, proceed to view the newly created/updated object
+    my %errors = $fatal ? (FATAL => $fatal) : $obj->cgi_update_errors;
+    
+    if (%errors) 
+    {
         # Set it up as it was:
-        warn "There were errors: ".Dumper(\%errors)."\n";
-        $r->{template_args}{cgi_params} = $r->{params};
-        $r->{template_args}{errors} = \%errors;
-        $r->{template} = "edit";
-    } else {
-        $r->{template} = "view";
+        $r->template_args->{cgi_params} = $r->params;
+        $r->template_args->{errors}     = \%errors;
+
+        undef $obj if $creating;
+        $r->template("edit");
+    }
+    else 
+    {
+        $r->template("view");
     }
-    $r->objects([ $obj ]);
+    
+    $r->objects( $obj ? [$obj] : []);
 }
 
-sub delete :Exported {
-    my ($self, $r) = @_;
-    $_->SUPER::delete for @{ $r->objects };
-    $r->objects([ $self->retrieve_all ]);
+# drb - I've (probably temporarily) split this out from do_edit, so it's 
+# reported by Mp::P::Trace
+sub _do_update_or_create
+{
+    my ($self, $r, $obj, $required_cols) = @_;
+    
+    my $fatal;
+    my $creating = 0;
+    my $h = CGI::Untaint->new( %{$r->params} );
+    
+    # update or create
+    if ($obj) 
+    {
+        # We have something to edit
+        eval { $obj->update_from_cgi( $h => {required => $required_cols} ) };
+        $fatal = $@;
+    }
+    else 
+    {
+        eval { 
+            $obj = $self->create_from_cgi( $h => {required => $required_cols} ) 
+        };
+        
+        if ($fatal = $@) 
+        {
+            warn "$fatal" if $r->debug;
+        }
+        $creating++;
+    }
+    
+    return $obj, $fatal, $creating;
+}
+    
+sub delete : Exported {
+    return shift->SUPER::delete(@_) if caller ne "Maypole::Model::Base";
+    my ( $self, $r ) = @_;
+    $_->SUPER::delete for @{ $r->objects || [] };
+    $r->objects( [ $self->retrieve_all ] );
     $r->{template} = "list";
+    $self->list($r);
+}
+
+sub stringify_column {
+    my $class = shift;
+    return (
+        $class->columns("Stringify"),
+        ( grep { /^(name|title)$/i } $class->columns ),
+        ( grep { /(name|title)/i } $class->columns ),
+        ( grep { !/id$/i } $class->primary_columns ),
+    )[0];
 }
 
 sub adopt {
-    my ($self, $child) = @_;
+    my ( $self, $child ) = @_;
     $child->autoupdate(1);
-    $child->columns( Stringify => qw/ name / );
+    if ( my $col = $child->stringify_column ) {
+        $child->columns( Stringify => $col );
+    }
 }
 
-sub search :Exported {
-    return shift->SUPER::search(@_) if caller eq "Class::DBI"; # oops
-    my ($self, $r) = @_;
-    my %fields = map {$_ => 1 } $self->columns;
-    my $oper = "like"; # For now
-    use Carp; Carp::confess("Urgh") unless ref $r;
-    my %params = %{$r->{params}};
-    my %values = map { $_ => {$oper, $params{$_} } }
-                 grep { $params{$_} and $fields{$_} } keys %params;
-
-    $r->objects([ %values ? $self->search_where(%values) : $self->retrieve_all ]);
+sub search : Exported {
+    return shift->SUPER::search(@_) if caller ne "Maypole::Model::Base";
+
+    # A real CDBI search.
+    my ( $self, $r ) = @_;
+    my %fields = map { $_ => 1 } $self->columns;
+    my $oper   = "like";                                # For now
+    my %params = %{ $r->{params} };
+    my %values = map { $_ => { $oper, $params{$_} } }
+      grep { defined $params{$_} && length ($params{$_}) && $fields{$_} }
+      keys %params;
+
     $r->template("list");
+    if ( !%values ) { return $self->list($r) }
+    my $order = $self->order($r);
+    $self = $self->do_pager($r);
+    $r->objects(
+        [
+            $self->search_where(
+                \%values, ( $order ? { order_by => $order } : () )
+            )
+        ]
+    );
     $r->{template_args}{search} = 1;
 }
 
-sub list :Exported {
-    my ($self, $r) = @_;
-    my %ok_columns = map {$_ => 1} $self->columns;
-    if ( my $rows = $r->config->{rows_per_page}) {
-        $self = $self->pager($rows, $r->query->{page});
-        $r->{template_args}{pager} = $self;
-    } 
-    my $order;
-    if ($order = $r->query->{order} and $ok_columns{$order}) {
-        $r->objects([ $self->retrieve_all_sorted_by( $order.
-            ($r->query->{o2} eq "desc" && " DESC")
-        )]);
-    } else {
-        $r->objects([ $self->retrieve_all ]);
+sub do_pager {
+    my ( $self, $r ) = @_;
+    if ( my $rows = $r->config->rows_per_page ) {
+        return $r->{template_args}{pager} =
+          $self->pager( $rows, $r->query->{page} );
+    }
+    else { return $self }
+}
+
+sub order {
+    my ( $self, $r ) = @_;
+    my %ok_columns = map { $_ => 1 } $self->columns;
+    my $q = $r->query;
+    my $order = $q->{order};
+    return unless $order and $ok_columns{$order};
+    $order .= ' DESC' if $q->{o2} and $q->{o2} eq 'desc';
+    return $order;
+}
+
+sub list : Exported {
+    my ( $self, $r ) = @_;
+    my $order = $self->order($r);
+    $self = $self->do_pager($r);
+    if ($order) {
+        $r->objects( [ $self->retrieve_all_sorted_by($order) ] );
+    }
+    else {
+        $r->objects( [ $self->retrieve_all ] );
     }
 }
-1;
 
+sub setup_database {
+    my ( $class, $config, $namespace, $dsn, $u, $p, $opts ) = @_;
+    $dsn  ||= $config->dsn;
+    $u    ||= $config->user;
+    $p    ||= $config->pass;
+    $opts ||= $config->opts;
+    $config->dsn($dsn);
+    warn "No DSN set in config" unless $dsn;
+    $config->loader || $config->loader(
+        Class::DBI::Loader->new(
+            namespace => $namespace,
+            dsn       => $dsn,
+            user      => $u,
+            password  => $p,
+	    %$opts,
+        )
+    );
+    $config->{classes} = [ $config->{loader}->classes ];
+    $config->{tables}  = [ $config->{loader}->tables ];
+    warn( 'Loaded tables: ' . join ',', @{ $config->{tables} } )
+      if $namespace->debug;
+}
+
+sub class_of {
+    my ( $self, $r, $table ) = @_;
+    return $r->config->loader->_table2class($table); # why not find_class ?
+}
+
+sub fetch_objects {
+    my ($class, $r)=@_;
+    my @pcs = $class->primary_columns;
+    if ( $#pcs ) {
+    my %pks;
+        @pks{@pcs}=(@{$r->{args}});
+        return $class->retrieve( %pks );
+    }
+    return $class->retrieve( $r->{args}->[0] );
+}
+
+1;