/ 
Mojo-mysql-1.01
River stage one • 3 direct dependents • 5 total dependents
/ Mojo::mysql::Database

NAME

Mojo::mysql::Database - Database

SYNOPSIS

use Mojo::mysql::Database;

my $db = Mojo::mysql::Database->new(mysql => $mysql, dbh => $dbh);

DESCRIPTION

Mojo::mysql::Database is a container for database handles used by Mojo::MySQL.

ATTRIBUTES

Mojo::mysql::Database implements the following attributes.

dbh

my $dbh = $db->dbh;
$db     = $db->dbh(DBI->new);

Database handle used for all queries.

mysql

my $mysql = $db->mysql;
$db       = $db->mysql(Mojo::mysql->new);

Mojo::mysql object this database belongs to.

results_class

$class = $db->results_class;
$db    = $db->results_class("MyApp::Results");

Class to be used by "query", defaults to Mojo::mysql::Results. Note that this class needs to have already been loaded before "query" is called.

METHODS

Mojo::mysql::Database inherits all methods from Mojo::EventEmitter and implements the following new ones.

backlog

my $num = $db->backlog;

Number of waiting non-blocking queries.

begin

my $tx = $db->begin;

Begin transaction and return Mojo::mysql::Transaction object, which will automatically roll back the transaction unless "commit" in Mojo::mysql::Transaction bas been called before it is destroyed.

# Add names in a transaction
eval {
  my $tx = $db->begin;
  $db->query('insert into names values (?)', 'Baerbel');
  $db->query('insert into names values (?)', 'Wolfgang');
  $tx->commit;
};
say $@ if $@;

delete

my $results = $db->delete($table, \%where);

Generate a DELETE statement with "abstract" in Mojo::mysql (usually an SQL::Abstract object) and execute it with "query". You can also append a callback to perform operations non-blocking.

$db->delete(some_table => sub {
  my ($db, $err, $results) = @_;
  ...
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

disconnect

$db->disconnect;

Disconnect database handle and prevent it from getting cached again.

insert

my $results = $db->insert($table, \@values || \%fieldvals, \%options);

Generate an INSERT statement with "abstract" in Mojo::mysql (usually an SQL::Abstract object) and execute it with "query". You can also append a callback to perform operations non-blocking.

$db->insert(some_table => {foo => 'bar'} => sub {
  my ($db, $err, $results) = @_;
  ...
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

pid

my $pid = $db->pid;

Return the connection id of the backend server process.

ping

my $bool = $db->ping;

Check database connection.

query

my $results = $db->query('select * from foo');
my $results = $db->query('insert into foo values (?, ?, ?)', @values);

Execute a blocking statement and return a Mojo::mysql::Results object with the results. You can also append a callback to perform operation non-blocking.

$db->query('select * from foo' => sub {
  my ($db, $err, $results) = @_;
  ...
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

quote

 my $escaped = $db->quote($str);

Quote a string literal for use as a literal value in an SQL statement.

quote_id

 my $escaped = $db->quote_id($id);

Quote an identifier (table name etc.) for use in an SQL statement.

select

my $results = $db->select($source, $fields, $where, $order);

Generate a SELECT statement with "abstract" in Mojo::mysql (usually an SQL::Abstract object) and execute it with "query". You can also append a callback to perform operations non-blocking.

$db->select(some_table => ['foo'] => sub {
  my ($db, $err, $results) = @_;
  ...
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

update

my $results = $db->update($table, \%fieldvals, \%where);

Generate an UPDATE statement with "abstract" in Mojo::mysql (usually an SQL::Abstract object) and execute it with "query". You can also append a callback to perform operations non-blocking.

$db->update(some_table => {foo => 'baz'} => {foo => 'bar'} => sub {
  my ($db, $err, $results) = @_;
  ...
});
Mojo::IOLoop->start unless Mojo::IOLoop->is_running;

SEE ALSO

Mojo::mysql.