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comparison Lib/Schema/DB/Constraint/ForeignKey.pm @ 0:03e58a454b20

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Создан репозитарий
author Sergey
date Tue, 14 Jul 2009 12:54:37 +0400
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children 16ada169ca75
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-1:000000000000 0:03e58a454b20
1 package Schema::DB::Constraint::ForeignKey;
2 use strict;
3 use Common;
4 use base qw(Schema::DB::Constraint);
5
6 BEGIN {
7 DeclareProperty ReferencedPrimaryKey => ACCESS_READ;
8 DeclareProperty OnDelete => ACCESS_READ;
9 DeclareProperty OnUpdate => ACCESS_READ;
10 }
11
12 sub CTOR {
13 my ($this,%args) = @_;
14
15 $this->SUPER::CTOR(%args);
16
17
18 die new Eexception("Referenced table must be an instance of a table object") if not UNIVERSAL::isa($args{'ReferencedTable'},'Schema::DB::Table');
19
20 die new Exception("Referenced columns must be a not empty list of columns") if not UNIVERSAL::isa($args{'ReferencedColumns'},'ARRAY') or not scalar(@{$args{'ReferencedColumns'}});
21
22 my @ReferencedColumns = map {Schema::DB::Constraint::ResolveColumn($args{'ReferencedTable'},$_)} @{$args{'ReferencedColumns'}};
23 my $ForeingPK = $args{'ReferencedTable'}->PrimaryKey or die new Exception('The referenced table doesn\'t have a primary key');
24
25 scalar (@ReferencedColumns) == scalar(@{$this->Columns}) or die new Exception('A foreing key columns doesn\'t match refenced columns');
26 my @ColumnsCopy = @ReferencedColumns;
27
28 die new Exception('A foreing key columns doesn\'t match refenced columns') if grep { not $_->Type->isSame((shift @ColumnsCopy)->Type)} $this->Columns;
29
30 @ColumnsCopy = @ReferencedColumns;
31 die new Exception('The foreign key must match to the primary key of the referenced table',$this->Name) if grep { not $_->Type->isSame(shift(@ColumnsCopy)->Type)} $ForeingPK->Columns;
32
33 $this->{$ReferencedPrimaryKey} = $ForeingPK;
34
35 $ForeingPK->ConnectFK($this);
36 }
37
38 sub Dispose {
39 my ($this) = @_;
40
41 $this->{$ReferencedPrimaryKey}->DisconnectFK($this) if not $this->{$ReferencedPrimaryKey}->isa('Object::Disposed');
42 delete $this->{$ReferencedPrimaryKey};
43
44 $this->SUPER::Dispose;
45 }
46
47 sub isSame {
48 my ($this,$other) = @_;
49
50 uc $this->OnDelete eq uc $other->OnDelete or return 0;
51 uc $this->OnUpdate eq uc $other->OnUpdate or return 0;
52
53 return $this->SUPER::isSame($other);
54 }
55
56
57
58 1;