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1 | package DBIx::Class::ResultSet; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use overload |
6 | '0+' => 'count', |
7 | fallback => 1; |
8 | |
9 | sub new { |
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10 | my ($it_class, $db_class, $attrs) = @_; |
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11 | #use Data::Dumper; warn Dumper(@_); |
12 | $it_class = ref $it_class if ref $it_class; |
13 | $attrs = { %{ $attrs || {} } }; |
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14 | my $cols = [ $db_class->_select_columns ]; |
15 | my $cursor = $db_class->storage->select($db_class->_table_name,$cols, |
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16 | $attrs->{where},$attrs); |
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17 | my $new = { |
18 | class => $db_class, |
19 | cursor => $cursor, |
20 | cols => $cols, |
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21 | cond => $attrs->{where}, |
22 | attrs => $attrs }; |
23 | return bless ($new, $it_class); |
24 | } |
25 | |
26 | sub slice { |
27 | my ($self, $min, $max) = @_; |
28 | my $attrs = { %{ $self->{attrs} || {} } }; |
29 | $self->{class}->throw("Can't slice without where") unless $attrs->{where}; |
30 | $attrs->{offset} = $min; |
31 | $attrs->{rows} = ($max ? ($max - $min + 1) : 1); |
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32 | my $slice = $self->new($self->{class}, $attrs); |
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33 | return (wantarray ? $slice->all : $slice); |
34 | } |
35 | |
36 | sub next { |
37 | my ($self) = @_; |
38 | my @row = $self->{cursor}->next; |
39 | return unless (@row); |
40 | return $self->{class}->_row_to_object($self->{cols}, \@row); |
41 | } |
42 | |
43 | sub count { |
44 | my ($self) = @_; |
45 | return $self->{attrs}{rows} if $self->{attrs}{rows}; |
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46 | # This is a hack, and will break on the last page of a paged set. |
47 | # Once we have limit support in Storage, kill it. |
48 | |
49 | my $db_class = $self->{class}; |
50 | my @cols = 'COUNT(*)'; |
51 | my $cursor = $db_class->storage->select($db_class->_table_name, \@cols, |
52 | $self->{cond}, $self->{attrs}); |
53 | return ($cursor->next)[0]; |
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54 | } |
55 | |
56 | sub all { |
57 | my ($self) = @_; |
58 | $self->reset; |
59 | my @all; |
60 | while (my $obj = $self->next) { |
61 | push(@all, $obj); |
62 | } |
63 | $self->reset; |
64 | return @all; |
65 | } |
66 | |
67 | sub reset { |
68 | my ($self) = @_; |
69 | $self->{cursor}->reset; |
70 | return $self; |
71 | } |
72 | |
73 | sub first { |
74 | return $_[0]->reset->next; |
75 | } |
76 | |
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77 | sub delete { |
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78 | my ($self) = @_; |
79 | $_->delete for $self->all; |
80 | return 1; |
81 | } |
82 | |
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83 | *delete_all = \&delete; # Yeah, yeah, yeah ... |
84 | |
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85 | 1; |