Release 0.07036_01

[dbsrgits/DBIx-Class-Schema-Loader.git] / lib / DBIx / Class / Schema / Loader / DBI / Pg.pm

diff --git a/lib/DBIx/Class/Schema/Loader/DBI/Pg.pm b/lib/DBIx/Class/Schema/Loader/DBI/Pg.pm
index aff1807..5dbcff9 100644 (file)
--- a/lib/DBIx/Class/Schema/Loader/DBI/Pg.pm
+++ b/lib/DBIx/Class/Schema/Loader/DBI/Pg.pm
@@ -5,7 +5,7 @@ use warnings;
 use base 'DBIx::Class::Schema::Loader::DBI::Component::QuotedDefault';
 use mro 'c3';
 
-our $VERSION = '0.07022';
+our $VERSION = '0.07036_01';
 
 =head1 NAME
 
@@ -40,6 +40,65 @@ sub _system_schemas {
     return ($self->next::method(@_), 'pg_catalog');
 }
 
+my %pg_rules = (
+    a => 'NO ACTION',
+    r => 'RESTRICT',
+    c => 'CASCADE',
+    n => 'SET NULL',
+    d => 'SET DEFAULT',
+);
+
+sub _table_fk_info {
+    my ($self, $table) = @_;
+
+    my $sth = $self->dbh->prepare_cached(<<"EOF");
+select q.constr_name, q.to_schema, q.to_table, from_cols.attname from_col, to_cols.attname to_col,
+       q.on_delete, q.on_update, q.is_deferrable
+from (select constr.conname constr_name, to_ns.nspname to_schema, to_class.relname to_table,
+             unnest(constr.conkey) from_colnum, unnest(constr.confkey) to_colnum,
+             constr.confdeltype on_delete, constr.confupdtype on_update,
+             constr.condeferrable is_deferrable,
+             constr.conrelid conrelid, constr.confrelid confrelid
+      from pg_constraint constr
+      join pg_namespace from_ns on constr.connamespace = from_ns.oid
+      join pg_class from_class on constr.conrelid = from_class.oid and from_class.relnamespace = from_ns.oid
+      join pg_class to_class on constr.confrelid = to_class.oid
+      join pg_namespace to_ns on to_class.relnamespace = to_ns.oid
+      where from_ns.nspname = ?
+        and from_class.relname = ?
+        and from_class.relkind = 'r'
+        and constr.contype = 'f'
+) q
+join pg_attribute from_cols on from_cols.attrelid = q.conrelid and from_cols.attnum = q.from_colnum
+join pg_attribute to_cols on to_cols.attrelid = q.confrelid and to_cols.attnum = q.to_colnum;
+EOF
+
+    $sth->execute($table->schema, $table->name);
+
+    my %rels;
+
+    while (my ($fk, $remote_schema, $remote_table, $col, $remote_col,
+               $delete_rule, $update_rule, $is_deferrable) = $sth->fetchrow_array) {
+        push @{ $rels{$fk}{local_columns}  }, $self->_lc($col);
+        push @{ $rels{$fk}{remote_columns} }, $self->_lc($remote_col);
+
+        $rels{$fk}{remote_table} = DBIx::Class::Schema::Loader::Table->new(
+            loader   => $self,
+            name     => $remote_table,
+            schema   => $remote_schema,
+        ) unless exists $rels{$fk}{remote_table};
+
+        $rels{$fk}{attrs} ||= {
+            on_delete     => $pg_rules{$delete_rule},
+            on_update     => $pg_rules{$update_rule},
+            is_deferrable => $is_deferrable,
+        };
+    }
+
+    return [ map { $rels{$_} } sort keys %rels ];
+}
+
+
 sub _table_uniq_info {
     my ($self, $table) = @_;
 
@@ -108,8 +167,8 @@ sub _table_comment {
     return $table_comment if $table_comment;
 
     ($table_comment) = $self->dbh->selectrow_array(<<'EOF', {}, $table->name, $table->schema);
-SELECT obj_description(oid) 
-FROM pg_class 
+SELECT obj_description(oid)
+FROM pg_class
 WHERE relname=? AND relnamespace=(SELECT oid FROM pg_namespace WHERE nspname=?)
 EOF
 
@@ -127,7 +186,7 @@ sub _column_comment {
 
     my ($table_oid) = $self->dbh->selectrow_array(<<'EOF', {}, $table->name, $table->schema);
 SELECT oid
-FROM pg_class 
+FROM pg_class
 WHERE relname=? AND relnamespace=(SELECT oid FROM pg_namespace WHERE nspname=?)
 EOF
 
@@ -234,12 +293,14 @@ EOF
             if ($typetype && $typetype eq 'e') {
                 # The following will extract a list of allowed values for the
                 # enum.
+                my $order_column = $self->dbh->{pg_server_version} >= 90100 ? 'enumsortorder' : 'oid';
                 my $typevalues = $self->dbh
                     ->selectall_arrayref(<<EOF, {}, $info->{data_type});
 SELECT e.enumlabel
 FROM pg_catalog.pg_enum e
 JOIN pg_catalog.pg_type t ON t.oid = e.enumtypid
 WHERE t.typname = ?
+ORDER BY e.$order_column
 EOF
 
                 $info->{extra}{list} = [ map { $_->[0] } @$typevalues ];
@@ -248,7 +309,7 @@ EOF
                 $info->{extra}{custom_type_name} = $info->{data_type};
 
                 $info->{data_type} = 'enum';
-                
+
                 delete $info->{size};
             }
         }