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1 | package MooseX::UndefTolerant::Constructor; |
2 | use Moose::Role; |
3 | |
4 | around('_generate_slot_initializer', sub { |
5 | my $orig = shift; |
6 | my $self = shift; |
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7 | |
8 | # note the key in the params may not match the attr name. |
9 | my $key_name = $self->_attributes->[$_[0]]->init_arg; |
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10 | |
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11 | # insert a line of code at the start of the initializer, |
12 | # clearing the param if it's undefined. |
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13 | |
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14 | if (defined $key_name) { |
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15 | my $tolerant_code = |
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16 | qq# delete \$params->{'$key_name'} unless # . |
17 | qq# exists \$params->{'$key_name'} && defined \$params->{'$key_name'};\n#; |
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18 | |
19 | return $tolerant_code . $self->$orig(@_); |
20 | } |
21 | else { |
22 | return $self->$orig(@_); |
23 | } |
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24 | }); |
25 | |
26 | no Moose::Role; |
27 | |
28 | 1; |