Easy dbi helper (perl inside sql and blessed results)
my $dbh = DBIx::DR->connect($dsn, $login, $passed);
$dbh->perform(
'UPDATE tbl SET a = 1 WHERE id = <%= $id %>',
id => 123
);
my $rowset = $dbh->select(
'SELECT * FROM tbl WHERE id IN (<% list @$ids %>)',
ids => [ 123, 456 ]
);
my $rowset = $dbh->select(-f => 'sqlfile.sql.ep', ids => [ 123, 456 ]);
while(my $row = $rowset->next) {
print "id: %d, value: %s\n", $row->id, $row->value;
}
The package extends \s-1DBI\s0 and allows You:
to use perl inside Your \s-1SQL\s0 requests;
to bless resultsets into Your package;
to place Your \s-1SQL\s0's into dedicated directory;
to use usual \s-1DBI\s0 methods.
A string describes iterator class. Default value is 'dbix-dr-iterator#new' (decamelized string).
A string describes item (one row) class. Default value is 'dbix-dr-iterator-item#new' (decamelized string).
Directory path to seek sql files (If You use dedicated SQLs).
Decode database errors into utf-8
All methods can receive the following arguments: It will load SQL-request from file. It will seek file in directory that was defined in dr_sql_dir param of connect. You needn't to use suffixes (.sql.ep) here, but You can.
It will bless (or construct) row into specified class. See below. Default value defined by dr_item argument of DBI::connect.
Do not bless row into any class.
It will bless (or construct) rowset into specified class. Default value defined by dr_iterator argument of DBI::connect.
Do not bless rowset into any class.
Do not pass iterator as second argument to item constructor.
Additional \s-1DBI\s0 arguments.
Selects into \s-1HASH\s0. Iterator will operate by names (not numbers).
If true the method will die with SQL-request.
If true the method will warn with SQL-request.
Are strings that represent class [ and method ].
foo_bar => FooBar foo_bar#subroutine => FooBar->subroutine foo_bar-baz => FooBar::Baz
Does SQL-request like '\s-1UPDATE\s0', '\s-1INSERT\s0', etc.
$dbh->perform($sql, value => 1, other_value => 'abc'); $dbh->perform(-f => $sql_file_name, value => 1, other_value => 'abc');
Does SQL-request, pack results into iterator class. By default it uses DBIx::DR::Iterator class.
my $res = $dbh->select(-f => $sql_file_name, value => 1); while(my $row = $res->next) { printf "RowId: %d, RowValue: %s\n", $row->id, $row->value; }
my $row = $row->get(15); # row 15
my $res = $dbh->select(-f => $sql_file_name, value => 1, -hash => 'name'); while(my $row = $res->next) { printf "RowId: %d, RowName: %s\n", $row->id, $row->name; }
my $row = $row->get('Vasya'); # row with name eq 'Vasya'
Does SQL-request that returns one row. Pack results into item class. Does SQL-request, pack results (one row) into item class. By default it uses DBIx::DR::Iterator::Item class.
You can use perl inside Your \s-1SQL\s0 requests:
% my $foo = 1; % my $bar = 2; <% my $foo_bar = $foo + $bar %>
..
% use POSIX; % my $gid = POSIX::getgid;
There are two functions available inside perl:
Replaces argument to '?', add argument value into bindlist. You can also use shortcut '=' instead of the function.
Example 1
SELECT * FROM tbl WHERE id = <% quote $id %>
Result
SELECT * FROM tbl WHERE id = ?
and bindlist will contain id value.
If You use DBIx::DR::ByteStream in place of string the function will recall immediate function.
Example 2
SELECT * FROM tbl WHERE id = <%= $id %>
Replaces argument to its value. You can also use shortcut '==' instead of the function.
Example 1
SELECT * FROM tbl WHERE id = <% immediate $id %>
Result
SELECT * FROM tbl WHERE id = 123
Where 123 is id value.
Be carful! Using the operator You can produce code that will be amenable to SQL-injection.
Example 2
SELECT * FROM tbl WHERE id = <%== $id %>
There are a few default helpers.
Expands array into Your \s-1SQL\s0 request.
Example
SELECT * FROM tbl WHERE status IN (<% list @$ids %>)
Result
SELECT * FROM tbl WHERE status IN (?,?,? ...)
and bindlist will contain ids values.
Expands array of hash into Your \s-1SQL\s0 request. The first argument can be a list of required keys. Places each group into brackets.
Example
INSERT INTO tbl ('a', 'b') VALUES <% hlist ['a', 'b'] => @$inserts
Result
INSERT INTO tbl ('a', 'b') VALUES (?, ?), (?, ?) ...
and bindlist will contain all inserts values.
Includes the other SQL-part.
Example
% include 'other_sql', argument1 => 1, argument2 => 2;
You can add Your helpers using method set_helper.
Sets (or replaces) helpers.
$dbh->set_helper(foo => sub { ... }, bar => sub { ... });
Each helper receives template object as the first argument.
Examples:
$dbh->set_helper(foo_AxB => sub { my ($tpl, $a, $b) = @_; $tpl->quote($a * $b); });
You can use quote and immediate functions inside Your helpers.
If You want use the other helper inside Your helper You have to do that by Yourself. To call the other helper You can also use \*(C`$tpl->call_helper\*(C' function.
call_helper
$dbh->set_helper( foo => sub { my ($tpl, $a, $b) = @_; $tpl->quote('foo' . $a . $b); }, bar => sub { my $tpl = shift; $tpl->call_helper(foo => 'b', 'c'); } );
Copyright (C) 2011 Dmitry E. Oboukhov <[email protected]> Copyright (C) 2011 Roman V. Nikolaev <[email protected]>
This program is free software, you can redistribute it and/or modify it under the terms of the Artistic License.
The project is placed git repo on github: https://github.com/unera/dbix-dr/ <https://github.com/unera/dbix-dr/>