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DBIx::Class::CDBICompat::ColumnsAsHash; |
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use strict; |
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use warnings; |
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use base 'DBIx::Class'; |
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=head1 NAME |
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DBIx::Class::CDBICompat::ColumnsAsHash - Emulates the behavior of Class::DBI where the object can be accessed as a hash of columns. |
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=head1 SYNOPSIS |
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See DBIx::Class::CDBICompat for usage directions. |
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=head1 DESCRIPTION |
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Emulates the I behavior of Class::DBI where the object can be accessed as a hash of columns. This is often used as a performance hack. |
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my $column = $result->{column}; |
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=head2 Differences from Class::DBI |
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If C is true it will warn when a column is accessed as a hash key. |
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=cut |
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sub new { |
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my $class = shift; |
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my $new = $class->next::method(@_); |
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$new->_make_columns_as_hash; |
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return $new; |
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} |
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sub inflate_result { |
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my $class = shift; |
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my $new = $class->next::method(@_); |
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$new->_make_columns_as_hash; |
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return $new; |
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} |
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sub _make_columns_as_hash { |
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my $self = shift; |
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for my $col ($self->columns) { |
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if( exists $self->{$col} ) { |
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warn "Skipping mapping $col to a hash key because it exists"; |
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} |
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tie $self->{$col}, 'DBIx::Class::CDBICompat::Tied::ColumnValue', |
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$self, $col; |
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} |
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} |
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package DBIx::Class::CDBICompat::Tied::ColumnValue; |
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66
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use Carp; |
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122
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use Scalar::Util qw(weaken isweak); |
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485
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sub TIESCALAR { |
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my($class, $obj, $col) = @_; |
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my $self = [$obj, $col]; |
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weaken $self->[0]; |
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return bless $self, $_[0]; |
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} |
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sub FETCH { |
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my $self = shift; |
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my($obj, $col) = @$self; |
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my $class = ref $obj; |
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my $id = $obj->id; |
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carp "Column '$col' of '$class/$id' was fetched as a hash" |
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0
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if $ENV{DBIC_CDBICOMPAT_HASH_WARN}; |
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return $obj->column_info($col)->{_inflate_info} |
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? $obj->get_inflated_column($col) |
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: $obj->get_column($col); |
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} |
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sub STORE { |
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my $self = shift; |
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my($obj, $col) = @$self; |
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my $class = ref $obj; |
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my $id = $obj->id; |
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carp "Column '$col' of '$class/$id' was stored as a hash" |
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0
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if $ENV{DBIC_CDBICOMPAT_HASH_WARN}; |
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return $obj->column_info($col)->{_inflate_info} |
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? $obj->set_inflated_column($col => shift) |
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: $obj->set_column($col => shift); |
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} |
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106
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=head1 FURTHER QUESTIONS? |
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108
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Check the list of L. |
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110
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=head1 COPYRIGHT AND LICENSE |
111
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112
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This module is free software L |
113
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by the L. You can |
114
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redistribute it and/or modify it under the same terms as the |
115
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L. |
116
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117
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=cut |
118
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119
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1; |