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1 | package DBIx::Class::Table; |
2 | |
3 | use strict; |
4 | use warnings; |
5 | |
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6 | use DBIx::Class::ResultSet; |
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7 | |
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8 | use Carp qw/croak/; |
9 | |
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10 | use base qw/DBIx::Class/; |
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11 | __PACKAGE__->load_components(qw/AccessorGroup/); |
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12 | |
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13 | __PACKAGE__->mk_group_accessors('simple' => |
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14 | qw/_columns _primaries name resultset_class result_class storage/); |
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15 | |
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16 | =head1 NAME |
17 | |
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18 | DBIx::Class::Table - Table object |
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19 | |
20 | =head1 SYNOPSIS |
21 | |
22 | =head1 DESCRIPTION |
23 | |
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24 | This class is responsible for defining and doing table-level operations on |
25 | L<DBIx::Class> classes. |
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26 | |
27 | =head1 METHODS |
28 | |
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29 | =cut |
30 | |
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31 | sub new { |
32 | my ($class, $attrs) = @_; |
33 | $class = ref $class if ref $class; |
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34 | my $new = bless({ %{$attrs || {}} }, $class); |
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35 | $new->{resultset_class} ||= 'DBIx::Class::ResultSet'; |
36 | $new->{_columns} ||= {}; |
37 | $new->{name} ||= "!!NAME NOT SET!!"; |
38 | return $new; |
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39 | } |
40 | |
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41 | sub add_columns { |
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42 | my ($self, @cols) = @_; |
43 | while (my $col = shift @cols) { |
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44 | $self->_columns->{$col} = (ref $cols[0] ? shift : {}); |
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45 | } |
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46 | } |
47 | |
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48 | *add_column = \&add_columns; |
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49 | |
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50 | =head2 add_columns |
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51 | |
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52 | $table->add_columns(qw/col1 col2 col3/); |
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53 | |
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54 | $table->add_columns('col1' => \%col1_info, 'col2' => \%col2_info, ...); |
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55 | |
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56 | Adds columns to the table object. If supplied key => hashref pairs uses |
57 | the hashref as the column_info for that column. |
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58 | |
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59 | =head2 add_column |
60 | |
61 | $table->add_column('col' => \%info?); |
62 | |
63 | Convenience alias to add_columns |
64 | |
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65 | =cut |
66 | |
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67 | sub resultset { |
68 | my $self = shift; |
69 | my $rs_class = $self->resultset_class; |
70 | eval "use $rs_class;"; |
71 | return $rs_class->new($self); |
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72 | } |
73 | |
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74 | =head2 has_column |
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75 | |
76 | if ($obj->has_column($col)) { ... } |
77 | |
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78 | Returns 1 if the table has a column of this name, 0 otherwise. |
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79 | |
80 | =cut |
81 | |
82 | sub has_column { |
83 | my ($self, $column) = @_; |
84 | return exists $self->_columns->{$column}; |
85 | } |
86 | |
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87 | =head2 column_info |
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88 | |
89 | my $info = $obj->column_info($col); |
90 | |
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91 | Returns the column metadata hashref for a column. |
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92 | |
93 | =cut |
94 | |
95 | sub column_info { |
96 | my ($self, $column) = @_; |
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97 | croak "No such column $column" unless exists $self->_columns->{$column}; |
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98 | return $self->_columns->{$column}; |
99 | } |
100 | |
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101 | =head2 columns |
102 | |
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103 | my @column_names = $obj->columns; |
104 | |
105 | =cut |
106 | |
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107 | sub columns { |
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108 | croak "columns() is a read-only accessor, did you mean add_columns()?" if (@_ > 1); |
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109 | return keys %{shift->_columns}; |
110 | } |
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111 | |
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112 | =head2 set_primary_key(@cols) |
113 | |
114 | Defines one or more columns as primary key for this table. Should be |
115 | called after C<add_columns>. |
116 | |
117 | =cut |
118 | |
119 | sub set_primary_key { |
120 | my ($self, @cols) = @_; |
121 | # check if primary key columns are valid columns |
122 | for (@cols) { |
123 | $self->throw("No such column $_ on table ".$self->name) |
124 | unless $self->has_column($_); |
125 | } |
126 | $self->_primaries(\@cols); |
127 | } |
128 | |
129 | =head2 primary_columns |
130 | |
131 | Read-only accessor which returns the list of primary keys. |
132 | |
133 | =cut |
134 | |
135 | sub primary_columns { |
136 | return @{shift->_primaries||[]}; |
137 | } |
138 | |
139 | |
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140 | 1; |
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141 | |
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142 | =head1 AUTHORS |
143 | |
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144 | Matt S. Trout <mst@shadowcatsystems.co.uk> |
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145 | |
146 | =head1 LICENSE |
147 | |
148 | You may distribute this code under the same terms as Perl itself. |
149 | |
150 | =cut |
151 | |