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1 | package DBIx::Class::CDBICompat::HasA; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
6 | sub has_a { |
7 | my ($self, $col, $f_class) = @_; |
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8 | $self->throw( "No such column ${col}" ) unless $self->_columns->{$col}; |
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9 | eval "require $f_class"; |
10 | my ($pri, $too_many) = keys %{ $f_class->_primaries }; |
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11 | $self->throw( "has_a only works with a single primary key; ${f_class} has more" ) |
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12 | if $too_many; |
13 | $self->add_relationship($col, $f_class, |
14 | { "foreign.${pri}" => "self.${col}" }, |
15 | { _type => 'has_a' } ); |
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16 | $self->inflate_column($col, |
17 | { inflate => sub { |
18 | my ($val, $self) = @_; |
19 | return ($self->search_related($col, {}, {}))[0] |
20 | || $f_class->new({ $pri => $val }); }, |
21 | deflate => sub { |
22 | my ($val, $self) = @_; |
23 | $self->throw("$val isn't a $f_class") unless $val->isa($f_class); |
24 | return ($val->_ident_values)[0] } } ); |
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25 | return 1; |
26 | } |
27 | |
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28 | 1; |