/usr/share/perl5/CPANDB/Requires.pod is in libcpandb-perl 0.18-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 | =head1 NAME
CPANDB::Requires - CPANDB class for the requires table
=head1 DESCRIPTION
TO BE COMPLETED
=head1 METHODS
=head2 base
# Returns 'CPANDB'
my $namespace = CPANDB::Requires->base;
Normally you will only need to work directly with a table class,
and only with one ORLite package.
However, if for some reason you need to work with multiple ORLite packages
at the same time without hardcoding the root namespace all the time, you
can determine the root namespace from an object or table class with the
C<base> method.
=head2 table
# Returns 'requires'
print CPANDB::Requires->table;
While you should not need the name of table for any simple operations,
from time to time you may need it programatically. If you do need it,
you can use the C<table> method to get the table name.
=head2 load
my $object = CPANDB::Requires->load( $distribution );
If your table has single column primary key, a C<load> method will be
generated in the class. If there is no primary key, the method is not
created.
The C<load> method provides a shortcut mechanism for fetching a single
object based on the value of the primary key. However it should only
be used for cases where your code trusts the record to already exists.
It returns a C<CPANDB::Requires> object, or throws an exception if the
object does not exist.
=head2 select
# Get all objects in list context
my @list = CPANDB::Requires->select;
# Get a subset of objects in scalar context
my $array_ref = CPANDB::Requires->select(
'where distribution > ? order by distribution',
1000,
);
The C<select> method executes a typical SQL C<SELECT> query on the
requires table.
It takes an optional argument of a SQL phrase to be added after the
C<FROM requires> section of the query, followed by variables
to be bound to the placeholders in the SQL phrase. Any SQL that is
compatible with SQLite can be used in the parameter.
Returns a list of B<CPANDB::Requires> objects when called in list context, or a
reference to an C<ARRAY> of B<CPANDB::Requires> objects when called in scalar
context.
Throws an exception on error, typically directly from the L<DBI> layer.
=head2 iterate
CPANDB::Requires->iterate( sub {
print $_->distribution . "\n";
} );
The C<iterate> method enables the processing of large tables one record at
a time without loading having to them all into memory in advance.
This plays well to the strength of SQLite, allowing it to do the work of
loading arbitrarily large stream of records from disk while retaining the
full power of Perl when processing the records.
The last argument to C<iterate> must be a subroutine reference that will be
called for each element in the list, with the object provided in the topic
variable C<$_>.
This makes the C<iterate> code fragment above functionally equivalent to the
following, except with an O(1) memory cost instead of O(n).
foreach ( CPANDB::Requires->select ) {
print $_->distribution . "\n";
}
You can filter the list via SQL in the same way you can with C<select>.
CPANDB::Requires->iterate(
'order by ?', 'distribution',
sub {
print $_->distribution . "\n";
}
);
You can also use it in raw form from the root namespace for better control.
Using this form also allows for the use of arbitrarily complex queries,
including joins. Instead of being objects, rows are provided as C<ARRAY>
references when used in this form.
CPANDB->iterate(
'select name from requires order by distribution',
sub {
print $_->[0] . "\n";
}
);
=head2 count
# How many objects are in the table
my $rows = CPANDB::Requires->count;
# How many objects
my $small = CPANDB::Requires->count(
'where distribution > ?',
1000,
);
The C<count> method executes a C<SELECT COUNT(*)> query on the
requires table.
It takes an optional argument of a SQL phrase to be added after the
C<FROM requires> section of the query, followed by variables
to be bound to the placeholders in the SQL phrase. Any SQL that is
compatible with SQLite can be used in the parameter.
Returns the number of objects that match the condition.
Throws an exception on error, typically directly from the L<DBI> layer.
=head1 ACCESSORS
=head2 distribution
if ( $object->distribution ) {
print "Object has been inserted\n";
} else {
print "Object has not been inserted\n";
}
Returns true, or throws an exception on error.
REMAINING ACCESSORS TO BE COMPLETED
=head1 SQL
The requires table was originally created with the
following SQL command.
CREATE TABLE requires (
distribution TEXT NOT NULL,
module TEXT NOT NULL,
version TEXT NULL,
phase TEXT NOT NULL,
PRIMARY KEY (distribution,
module,
phase),
FOREIGN KEY (distribution) REFERENCES distribution (distribution),
FOREIGN KEY (module) REFERENCES module (module)
)
=head1 SUPPORT
CPANDB::Requires is part of the L<CPANDB> API.
See the documentation for L<CPANDB> for more information.
=head1 AUTHOR
Adam Kennedy E<lt>adamk@cpan.orgE<gt>
=head1 COPYRIGHT
Copyright 2009 - 2012 Adam Kennedy.
This program is free software; you can redistribute
it and/or modify it under the same terms as Perl itself.
The full text of the license can be found in the
LICENSE file included with this module.
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