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Mojo::Pg::Che

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NAME

Mojo::Pg::Che - mix of great Mojo::Pg and DBI

DESCRIPTION

See Mojo::Pg

VERSION

Version 0.857

SYNOPSIS

    use Mojo::Pg::Che;

    my $pg = Mojo::Pg::Che->connect("dbname=test;", "postgres", 'pg-pwd', \%attrs, max_connections=>10);
    # or
    my $pg = Mojo::Pg::Che->new
      ->dsn("DBI:Pg:dbname=test;")
      ->username("postgres")
      ->password('pg--pw')
      ->options(\%attrs)
      ->connect();
    
    # or as URL
    my $pg = Mojo::Pg::Che->new('postgresq://postgres@/test');
    # or
    my $pg = Mojo::Pg::Che->new(dsn=>"dbname=test;", username=>"postgres", password=>'pg-pwd', options=>\%attrs, max_connections=>10);
    
    # from parent Mojo::Pg only
    my $pg2 = Mojo::Pg::Che->new($che->pg);

    # Bloking query
    my $result = $pg->query('select ...', undef, @bind);
    
    # Cached query
    my $result = $pg->query('select ...', {Cached => 1, ...}, @bind);
    
    # prepare sth
    my $sth = $pg->prepare('select ...');
    
    # Non-blocking query for async sth
    $pg->query($sth, undef, @bind, sub {my ($db, $err, $result) = @_; ...});
    Mojo::IOLoop->start unless Mojo::IOLoop->is_running;
    
    # Mojo::Pg style
    my $now = $pg->db->query('select now() as now')->hash->{now};
    $pg->db->query('select pg_sleep(?::int), now() as now', undef, 2, $cb);
    
    # DBI style
    my $now = $pg->selectrow_hashref('select now() as now')->{now};
    my $now = $pg->db->selectrow_hashref('select now() as now')->{now};
    
    my $now = $pg->selectrow_array('select now() as now');

Transaction syntax

  eval {
    my $tx = $pg->begin;
    $tx->query('insert into foo (name) values (?)', 'bar');
    $tx->do('insert into foo (name) values (?)', 'baz');
    $tx->commit;
  };
  die $@ if $@;
  
  my $db = $pg->db;
  $db->begin;
  $db->do('insert into foo (name) values (?)', 'bazzzz');
  $db->rollback;
  $db->begin;
  $db->query('insert into foo (name) values (?)', 'barrr');
  $db->commit;

Non-blocking query

  my @results;
  my $cb = sub {
    my ($db, $err, $results) = @_;
    die $err if $err;
    push @results, $results;
  };
  $pg->query('select ?::date as d, pg_sleep(?::int)', undef, ("2016-06-$_", 1), $cb)
    for 17..23;
  Mojo::IOLoop->start unless Mojo::IOLoop->is_running;
  like($_->hash->{d}, qr/2016-06-\d+/, 'correct async query')
    for @results;

ATTRIBUTES

See main <Mojo::Pg#ATTRIBUTES> and source code.

METHODS

Mojo::Pg::Che does implement the following methods.

Mojo::Pg-style connecting.

    my $pg = Mojo::Pg::Che->new
      ->dsn("DBI:Pg:dbname=test;")
      ->username("postgres")
      ->password('pg--pw')
      ->options(\%attrs)
      ->connect();
    
    # URL
    my $pg = Mojo::Pg::Che->new('postgresq://postgres@/test');
    # parent Mojo::Pg only
    my $pg2 = Mojo::Pg::Che->new($pg->pg);
    # or
    my $pg = Mojo::Pg::Che->new(dsn=>"dbname=test;", username=>"postgres", password=>'pg-pwd', options=>\%attrs, max_connections=>10);

connect

DBI-style of new object instance. See DBI#connect

  my $pg = Mojo::Pg::Che->connect("dbname=test;", "postgres", 'pg-pwd', \%attrs, max_connections=>10);

NOTE. Dont set object attrs after ->connect().

db

From method of Mojo::Pg#db. Because can first input param - DBI database handler (when prepared statement used).

prepare

Prepare and return DBI statement handler for query string.

prepare_cached

Prepare and return DBI cached statement handler for query string.

query

Like Mojo::Pg::Database#query but input params - Mojo::Pg::Che#Params-for-quering-methods

Blocking query without attr Async or callback.

Non-blocking query with attr Async or callback.

select

Same method query.

selectrow_array

DBI style quering. See DBI#selectrow_array. Blocking | non-blocking. Input params - Mojo::Pg::Che#Params-for-quering-methods.

selectrow_arrayref

DBI style quering. See DBI#selectrow_arrayref. Blocking | non-blocking. Input params - Mojo::Pg::Che#Params-for-quering-methods.

selectrow_hashref

DBI style quering. See DBI#selectrow_hashref. Blocking | non-blocking. Input params - Mojo::Pg::Che#Params-for-quering-methods.

selectall_arrayref

DBI style quering. See DBI#selectall_arrayref. Blocking | non-blocking. Input params - Mojo::Pg::Che#Params-for-quering-methods.

selectall_hashref

DBI style quering. See DBI#selectall_hashref. Blocking | non-blocking. Input params - Mojo::Pg::Che#Params-for-quering-methods.

selectcol_arrayref

DBI style quering. See DBI#selectcol_arrayref. Blocking | non-blocking. Input params - Mojo::Pg::Che#Params-for-quering-methods.

do

DBI style quering. See DBI#do. Blocking | non-blocking. Input params - Mojo::Pg::Che#Params-for-quering-methods.

begin

Start transaction and return new Mojo::Pg::Che::Database object which attr {tx} is a Mojo::Pg::Transaction object. Sinonyms are: ->tx and ->begin_work.

Params for quering methods

The methods query, select..., do has next ordered input params:

• String query | statement handler object

• Hashref attrs (optional)

• Array of bind values (optional)

• Last param - callback/coderef for non-blocking (optional)

HARD REDEFINED SUBROUTINES

Mojo::Pg::Che does redefine Mojo::Pg _enqueue and _dequeue subroutines.

SEE ALSO

Mojo::Pg

DBI

AUTHOR

Михаил Че (Mikhail Che), <mche[-at-]cpan.org>

BUGS / CONTRIBUTING

Please report any bugs or feature requests at https://github.com/mche/Mojo-Pg-Che/issues. Pull requests also welcome.

COPYRIGHT

Copyright 2016+ Mikhail Che.

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.

cpanm Mojo::Pg::Che

perl -MCPAN -e shell
install Mojo::Pg::Che