initial merge of Schwern's CDBICompat work, with many thanks

[dbsrgits/DBIx-Class.git] / lib / SQL / Translator / Parser / DBIx / Class.pm

diff --git a/lib/SQL/Translator/Parser/DBIx/Class.pm b/lib/SQL/Translator/Parser/DBIx/Class.pm
index c0fece0..fd5762a 100644 (file)
--- a/lib/SQL/Translator/Parser/DBIx/Class.pm
+++ b/lib/SQL/Translator/Parser/DBIx/Class.pm
@@ -26,10 +26,11 @@ use base qw(Exporter);
 # We're working with DBIx::Class Schemas, not data streams.
 # -------------------------------------------------------------------
 sub parse {
-    my ($tr, $data) = @_;
-    my $args        = $tr->parser_args;
-    my $dbixschema  = $args->{'DBIx::Schema'} || $data;
-    $dbixschema   ||= $args->{'package'};
+    my ($tr, $data)   = @_;
+    my $args          = $tr->parser_args;
+    my $dbixschema    = $args->{'DBIx::Schema'} || $data;
+    $dbixschema     ||= $args->{'package'};
+    my $limit_sources = $args->{'sources'};
     
     die 'No DBIx::Schema' unless ($dbixschema);
     if (!ref $dbixschema) {
@@ -42,13 +43,32 @@ sub parse {
 
 #    print Dumper($dbixschema->registered_classes);
 
-    #foreach my $tableclass ($dbixschema->registered_classes)
-    foreach my $moniker ($dbixschema->sources)
+    my %seen_tables;
+
+    my @monikers = $dbixschema->sources;
+    if ($limit_sources) {
+        my $ref = ref $limit_sources || '';
+        die "'sources' parameter must be an array or hash ref" unless $ref eq 'ARRAY' || ref eq 'HASH';
+
+        # limit monikers to those specified in 
+        my $sources;
+        if ($ref eq 'ARRAY') {
+            $sources->{$_} = 1 for (@$limit_sources);
+        } else {
+            $sources = $limit_sources;
+        }
+        @monikers = grep { $sources->{$_} } @monikers;
+    }
+
+
+    foreach my $moniker (@monikers)
     {
         #eval "use $tableclass";
         #print("Can't load $tableclass"), next if($@);
         my $source = $dbixschema->source($moniker);
 
+        next if $seen_tables{$source->name}++;
+
         my $table = $schema->add_table(
                                        name => $source->name,
                                        type => 'TABLE',
@@ -76,7 +96,7 @@ sub parse {
         my @primary = $source->primary_columns;
         my %unique_constraints = $source->unique_constraints;
         foreach my $uniq (keys %unique_constraints) {
-            if (!equal_keys($unique_constraints{$uniq}, \@primary)) {
+            if (!$source->compare_relationship_keys($unique_constraints{$uniq}, \@primary)) {
                 $table->add_constraint(
                             type             => 'unique',
                             name             => "$uniq",
@@ -86,15 +106,19 @@ sub parse {
         }
 
         my @rels = $source->relationships();
+
+        my %created_FK_rels;
+
         foreach my $rel (@rels)
         {
             my $rel_info = $source->relationship_info($rel);
 
-            my $rel_table = $source->related_source($rel)->name;
-
             # Ignore any rel cond that isn't a straight hash
             next unless ref $rel_info->{cond} eq 'HASH';
 
+            my $othertable = $source->related_source($rel);
+            my $rel_table = $othertable->name;
+
             # Get the key information, mapping off the foreign/self markers
             my @cond = keys(%{$rel_info->{cond}});
             my @refkeys = map {/^\w+\.(\w+)$/} @cond;
@@ -103,18 +127,43 @@ sub parse {
             if($rel_table)
             {
 
+                my $reverse_rels = $source->reverse_relationship_info($rel);
+                my ($otherrelname, $otherrelationship) = each %{$reverse_rels};
+
+                my $on_delete = '';
+                my $on_update = '';
+
+                if (defined $otherrelationship) {
+                    $on_delete = $otherrelationship->{'attrs'}->{cascade_delete} ? 'CASCADE' : '';
+                    $on_update = $otherrelationship->{'attrs'}->{cascade_copy} ? 'CASCADE' : '';
+                }
+
+                # Make sure we dont create the same foreign key constraint twice
+                my $key_test = join("\x00", @keys);
+
                 #Decide if this is a foreign key based on whether the self
                 #items are our primary columns.
+                $DB::single = 1 if $moniker eq 'Tests::MBTI::Result';
 
                 # If the sets are different, then we assume it's a foreign key from
                 # us to another table.
-                if (!equal_keys(\@keys, \@primary)) {
+                # OR: If is_foreign_key_constraint attr is explicity set (or set to false) on the relation
+                if ( ! exists $created_FK_rels{$rel_table}->{$key_test} &&
+                     ( exists $rel_info->{attrs}{is_foreign_key_constraint} && 
+                       $rel_info->{attrs}{is_foreign_key_constraint} ||
+                       !$source->compare_relationship_keys(\@keys, \@primary)
+                     )
+                   )
+                {
+                    $created_FK_rels{$rel_table}->{$key_test} = 1;
                     $table->add_constraint(
                                 type             => 'foreign_key',
                                 name             => "fk_$keys[0]",
                                 fields           => \@keys,
                                 reference_fields => \@refkeys,
                                 reference_table  => $rel_table,
+                                on_delete        => $on_delete,
+                                on_update        => $on_update
                     );
                 }
             }
@@ -123,42 +172,5 @@ sub parse {
     return 1;
 }
 
-# -------------------------------------------------------------------
-# equal_keys($key1, $key2)
-#
-# See if the set of keys in $key1 is equal to the set of keys in $key2
-# -------------------------------------------------------------------
-sub equal_keys {
-    my ($key1, $key2) = @_;
-
-    # Make sure every key1 is in key2
-    my $found;
-    foreach my $key (@$key1) {
-        $found = 0;
-        foreach my $prim (@$key2) {
-            if ($prim eq $key) {
-                $found = 1;
-                last;
-            }
-        }
-        last unless $found;
-    }
-
-    # Make sure every key2 is in key1
-    if ($found) {
-        foreach my $prim (@$key2) {
-            $found = 0;
-            foreach my $key (@$key1) {
-                if ($prim eq $key) {
-                    $found = 1;
-                    last;
-                }
-            }
-            last unless $found;
-        }
-    }
-
-    return $found;
-}
-
 1;
+