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1 | package DBIx::Class::InflateColumn::DateTime; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | use base qw/DBIx::Class/; |
6 | |
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7 | =head1 NAME |
8 | |
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9 | DBIx::Class::InflateColumn::DateTime - Auto-create DateTime objects from date and datetime columns. |
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10 | |
11 | =head1 SYNOPSIS |
12 | |
13 | Load this component and then declare one or more |
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14 | columns to be of the datetime, timestamp or date datatype. |
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15 | |
16 | package Event; |
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17 | __PACKAGE__->load_components(qw/InflateColumn::DateTime Core/); |
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18 | __PACKAGE__->add_columns( |
19 | starts_when => { data_type => 'datetime' } |
20 | ); |
21 | |
22 | Then you can treat the specified column as a L<DateTime> object. |
23 | |
24 | print "This event starts the month of ". |
25 | $event->starts_when->month_name(); |
26 | |
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27 | If you want to set a specific timezone for that field, use: |
28 | |
29 | __PACKAGE__->add_columns( |
30 | starts_when => { data_type => 'datetime', extra => { timezone => "America/Chicago" } } |
31 | ); |
32 | |
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33 | If you want to inflate no matter what data_type your column is, |
34 | use inflate_datetime or inflate_date: |
35 | |
36 | __PACKAGE__->add_columns( |
37 | starts_when => { data_type => 'varchar', inflate_datetime => 1 } |
38 | ); |
39 | |
40 | __PACKAGE__->add_columns( |
41 | starts_when => { data_type => 'varchar', inflate_date => 1 } |
42 | ); |
43 | |
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44 | =head1 DESCRIPTION |
45 | |
46 | This module figures out the type of DateTime::Format::* class to |
47 | inflate/deflate with based on the type of DBIx::Class::Storage::DBI::* |
48 | that you are using. If you switch from one database to a different |
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49 | one your code should continue to work without modification (though note |
50 | that this feature is new as of 0.07, so it may not be perfect yet - bug |
51 | reports to the list very much welcome). |
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52 | |
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53 | For more help with using components, see L<DBIx::Class::Manual::Component/USING>. |
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54 | |
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55 | =cut |
56 | |
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57 | __PACKAGE__->load_components(qw/InflateColumn/); |
58 | |
59 | __PACKAGE__->mk_group_accessors('simple' => '__datetime_parser'); |
60 | |
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61 | =head2 register_column |
62 | |
63 | Chains with the L<DBIx::Class::Row/register_column> method, and sets |
64 | up datetime columns appropriately. This would not normally be |
65 | directly called by end users. |
66 | |
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67 | In the case of an invalid date, L<DateTime> will throw an exception. To |
68 | bypass these exceptions and just have the inflation return undef, use |
69 | the C<datetime_undef_if_invalid> option in the column info: |
70 | |
71 | "broken_date", |
72 | { |
73 | data_type => "datetime", |
74 | default_value => '0000-00-00', |
75 | is_nullable => 1, |
76 | datetime_undef_if_invalid => 1 |
77 | } |
78 | |
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79 | =cut |
80 | |
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81 | sub register_column { |
82 | my ($self, $column, $info, @rest) = @_; |
83 | $self->next::method($column, $info, @rest); |
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84 | return unless defined($info->{data_type}); |
85 | my $type = lc($info->{data_type}); |
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86 | $type = 'datetime' if ($type =~ /^timestamp/); |
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87 | $type = 'datetime' if exists $info->{inflate_datetime} and $info->{inflate_datetime}; |
88 | $type = 'date' if exists $info->{inflate_date} and $info->{inflate_date}; |
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89 | my $timezone; |
90 | if ( exists $info->{extra} and exists $info->{extra}{timezone} and defined $info->{extra}{timezone} ) { |
91 | $timezone = $info->{extra}{timezone}; |
92 | } |
93 | |
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94 | my $undef_if_invalid = $info->{datetime_undef_if_invalid}; |
95 | |
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96 | if ($type eq 'datetime' || $type eq 'date') { |
97 | my ($parse, $format) = ("parse_${type}", "format_${type}"); |
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98 | $self->inflate_column( |
99 | $column => |
100 | { |
101 | inflate => sub { |
102 | my ($value, $obj) = @_; |
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103 | my $dt = eval { $obj->_datetime_parser->$parse($value); }; |
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104 | die "Error while inflating ${value} for ${column} on ${self}: $@" |
105 | if $@ and not $undef_if_invalid; |
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106 | $dt->set_time_zone($timezone) if $timezone; |
107 | return $dt; |
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108 | }, |
109 | deflate => sub { |
110 | my ($value, $obj) = @_; |
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111 | $value->set_time_zone($timezone) if $timezone; |
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112 | $obj->_datetime_parser->$format($value); |
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113 | }, |
114 | } |
115 | ); |
116 | } |
117 | } |
118 | |
119 | sub _datetime_parser { |
120 | my $self = shift; |
121 | if (my $parser = $self->__datetime_parser) { |
122 | return $parser; |
123 | } |
124 | my $parser = $self->result_source->storage->datetime_parser(@_); |
125 | return $self->__datetime_parser($parser); |
126 | } |
127 | |
128 | 1; |
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129 | __END__ |
130 | |
131 | =head1 SEE ALSO |
132 | |
133 | =over 4 |
134 | |
135 | =item More information about the add_columns method, and column metadata, |
136 | can be found in the documentation for L<DBIx::Class::ResultSource>. |
137 | |
138 | =back |
139 | |
140 | =head1 AUTHOR |
141 | |
142 | Matt S. Trout <mst@shadowcatsystems.co.uk> |
143 | |
144 | =head1 CONTRIBUTORS |
145 | |
146 | Aran Deltac <bluefeet@cpan.org> |
147 | |
148 | =head1 LICENSE |
149 | |
150 | You may distribute this code under the same terms as Perl itself. |
151 | |