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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; |
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8 | use Data::Page; |
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9 | |
10 | sub new { |
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11 | my ($it_class, $db_class, $attrs) = @_; |
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12 | #use Data::Dumper; warn Dumper(@_); |
13 | $it_class = ref $it_class if ref $it_class; |
14 | $attrs = { %{ $attrs || {} } }; |
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15 | my $cols = [ $db_class->_select_columns ]; |
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16 | my $new = { |
17 | class => $db_class, |
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18 | cols => $cols, |
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19 | cond => $attrs->{where}, |
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20 | count => undef, |
21 | pager => undef, |
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22 | attrs => $attrs }; |
23 | return bless ($new, $it_class); |
24 | } |
25 | |
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26 | sub cursor { |
27 | my ($self) = @_; |
28 | my ($db_class, $attrs) = @{$self}{qw/class attrs/}; |
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29 | if ($attrs->{page}) { |
30 | $attrs->{rows} = $self->pager->entries_per_page; |
31 | $attrs->{offset} = $self->pager->skipped; |
32 | } |
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33 | return $self->{cursor} |
34 | ||= $db_class->storage->select($db_class->_table_name, $self->{cols}, |
35 | $attrs->{where},$attrs); |
36 | } |
37 | |
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38 | sub slice { |
39 | my ($self, $min, $max) = @_; |
40 | my $attrs = { %{ $self->{attrs} || {} } }; |
41 | $self->{class}->throw("Can't slice without where") unless $attrs->{where}; |
42 | $attrs->{offset} = $min; |
43 | $attrs->{rows} = ($max ? ($max - $min + 1) : 1); |
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44 | my $slice = $self->new($self->{class}, $attrs); |
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45 | return (wantarray ? $slice->all : $slice); |
46 | } |
47 | |
48 | sub next { |
49 | my ($self) = @_; |
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50 | my @row = $self->cursor->next; |
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51 | return unless (@row); |
52 | return $self->{class}->_row_to_object($self->{cols}, \@row); |
53 | } |
54 | |
55 | sub count { |
56 | my ($self) = @_; |
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57 | my $db_class = $self->{class}; |
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58 | my $attrs = { %{ $self->{attrs} } }; |
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59 | unless ($self->{count}) { |
60 | # offset and order by are not needed to count |
61 | delete $attrs->{$_} for qw/offset order_by/; |
62 | |
63 | my @cols = 'COUNT(*)'; |
64 | $self->{count} = $db_class->storage->select_single($db_class->_table_name, \@cols, |
65 | $self->{cond}, $attrs); |
66 | } |
67 | return 0 unless $self->{count}; |
68 | return ( $attrs->{rows} && $attrs->{rows} < $self->{count} ) |
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69 | ? $attrs->{rows} |
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70 | : $self->{count}; |
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71 | } |
72 | |
73 | sub all { |
74 | my ($self) = @_; |
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75 | return map { $self->{class}->_row_to_object($self->{cols}, $_); } |
73f58123 |
76 | $self->cursor->all; |
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77 | } |
78 | |
79 | sub reset { |
80 | my ($self) = @_; |
73f58123 |
81 | $self->cursor->reset; |
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82 | return $self; |
83 | } |
84 | |
85 | sub first { |
86 | return $_[0]->reset->next; |
87 | } |
88 | |
28927b50 |
89 | sub delete { |
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90 | my ($self) = @_; |
91 | $_->delete for $self->all; |
92 | return 1; |
93 | } |
94 | |
28927b50 |
95 | *delete_all = \&delete; # Yeah, yeah, yeah ... |
96 | |
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97 | sub pager { |
98 | my ($self) = @_; |
99 | my $attrs = $self->{attrs}; |
100 | delete $attrs->{offset}; |
101 | my $rows_per_page = delete $attrs->{rows} || 10; |
102 | $self->{pager} ||= Data::Page->new( |
103 | $self->count, $rows_per_page, $attrs->{page} || 1); |
104 | $attrs->{rows} = $rows_per_page; |
105 | return $self->{pager}; |
106 | } |
107 | |
108 | sub page { |
109 | my ($self, $page) = @_; |
110 | my $attrs = $self->{attrs}; |
111 | $attrs->{page} = $page; |
112 | return $self->new($self->{class}, $attrs); |
113 | } |
114 | |
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115 | 1; |