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07037f89 |
1 | package DBIx::Class::Relationship::BelongsTo; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | sub belongs_to { |
7 | my ($class, $rel, $f_class, $cond, $attrs) = @_; |
8 | eval "require $f_class"; |
9 | # single key relationship |
10 | if (not defined $cond) { |
11 | my ($pri, $too_many) = keys %{ $f_class->_primaries }; |
12 | my $acc_type = ($class->_columns->{$rel}) ? 'filter' : 'single'; |
13 | $class->add_relationship($rel, $f_class, |
14 | { "foreign.${pri}" => "self.${rel}" }, |
15 | { accessor => $acc_type } |
16 | ); |
17 | } |
18 | # multiple key relationship |
19 | else { |
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20 | my %f_primaries = eval { %{ $f_class->_primaries } }; |
21 | my $f_loaded = !$@; |
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22 | my $cond_rel; |
23 | for (keys %$cond) { |
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24 | if (m/\./) { # Explicit join condition |
25 | $cond_rel = $cond; |
26 | last; |
27 | } |
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28 | $cond_rel->{"foreign.$_"} = "self.".$cond->{$_}; |
29 | # primary key usage checks |
30 | if (exists $f_primaries{$_}) { |
31 | delete $f_primaries{$_}; |
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32 | } elsif ($f_loaded) { |
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33 | $class->throw("non primary key used in join condition: $_"); |
34 | } |
35 | } |
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36 | $class->throw("not all primary keys used in multi key relationship!") if $f_loaded && keys %f_primaries; |
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37 | $class->add_relationship($rel, $f_class, |
38 | $cond_rel, |
39 | { accessor => 'single', %{$attrs ||{}} } |
40 | ); |
41 | } |
42 | return 1; |
43 | } |
44 | |
503536d5 |
45 | =head1 AUTHORS |
46 | |
47 | Alexander Hartmaier <Alexander.Hartmaier@t-systems.at> |
48 | |
49 | Matt S. Trout <mst@shadowcatsystems.co.uk> |
50 | |
51 | =cut |
52 | |
07037f89 |
53 | 1; |