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t/02searches_joins.t  view on Meta::CPAN

    ok( !$users_obj->_is_joined, "new object isn't joined");
    my $alias = $users_obj->new_alias( 'user_to_groups' );
    ok( $alias, "new alias" );
    is($users_obj->join(
            type   => 'LEFT',
            column1 => 'id',
            alias2 => $alias,
            column2 => 'user_id' ),
        $alias, "joined table"
    );
    $users_obj->limit( alias => $alias, column => 'id', operator => 'IS', value => 'NULL' );
    ok( $users_obj->build_select_query =~ /LEFT JOIN/, 'LJ is not optimized away');
    is( $users_obj->count, 1, "user is not member of any group" );
}

diag "main <- alias <- join" if $ENV{'TEST_VERBOSE'};
{
    # The join depends on the alias, we should build joins with correct order.
    $users_obj->clean_slate;
    is_deeply( $users_obj, $clean_obj, 'after clean_slate looks like new object');
    ok( !$users_obj->_is_joined, "new object isn't joined");
    my $alias = $users_obj->new_alias( 'user_to_groups' );
    ok( $alias, "new alias" );
    ok( $users_obj->_is_joined, "object with aliases is joined");
    $users_obj->limit( column => 'id', value => "$alias.user_id", quote_value => 0);
    ok( my $groups_alias = $users_obj->join(
            alias1 => $alias,
            column1 => 'group_id',
            table2 => 'groups',
            column2 => 'id',
        ),
        "joined table"
    );
    $users_obj->limit( alias => $groups_alias, column => 'name', value => 'Developers' );
    #diag $users_obj->build_select_query;
    is( $users_obj->count, 3, "three members" );
}

diag "main <- alias <- join into main" if $ENV{'TEST_VERBOSE'};
{
    # DBs' parsers don't like: FROM X, Y JOIN C ON C.f = X.f
    $users_obj->clean_slate;
    is_deeply( $users_obj, $clean_obj, 'after clean_slate looks like new object');
    ok( !$users_obj->_is_joined, "new object isn't joined");

    ok( my $groups_alias = $users_obj->new_alias( 'groups' ), "new alias" );
    ok( my $g2u_alias = $users_obj->join(
            alias1 => 'main',
            column1 => 'id',
            table2 => 'user_to_groups',
            column2 => 'user_id',
        ),
        "joined table"
    );
    $users_obj->limit( alias => $g2u_alias, column => 'group_id', value => "$groups_alias.id", quote_value => 0);
    $users_obj->limit( alias => $groups_alias, column => 'name', value => 'Developers' );
    #diag $users_obj->build_select_query;
    is( $users_obj->count, 3, "three members" );
}

diag "cascaded LEFT JOIN optimization" if $ENV{'TEST_VERBOSE'}; 
{
    $users_obj->clean_slate;
    is_deeply( $users_obj, $clean_obj, 'after clean_slate looks like new object');
    ok( !$users_obj->_is_joined, "new object isn't joined");
    my $alias = $users_obj->join(
        type   => 'LEFT',
        column1 => 'id',
        table2 => 'user_to_groups',
        column2 => 'user_id'
    );
    ok( $alias, "Join returns alias" );
    $alias = $users_obj->join(
        type   => 'LEFT',
        alias1 => $alias,
        column1 => 'group_id',
        table2 => 'groups',
        column2 => 'id'
    );
    $users_obj->limit( alias => $alias, column => 'id', operator => 'IS NOT', value => 'NULL' );
    if ( $d eq 'mysql' && $handle->database_version =~ /^[34]/ ) {
        ok( $users_obj->build_select_query !~ /LEFT JOIN/, 'both LJs are optimized away');
    } else {
        ok( 1, 'mysql >= 5.0 dont need this optimization' );
    }
    is( $users_obj->count, 3, "users whos is memebers of at least one group" );
}

diag "LEFT JOIN optimization and OR clause" if $ENV{'TEST_VERBOSE'}; 
{
    $users_obj->clean_slate;
    is_deeply( $users_obj, $clean_obj, 'after clean_slate looks like new object');
    ok( !$users_obj->_is_joined, "new object isn't joined");
    my $alias = $users_obj->join(
        type   => 'LEFT',
        column1 => 'id',
        table2 => 'user_to_groups',
        column2 => 'user_id'
    );
    $users_obj->open_paren('my_clause');
    $users_obj->limit(
        subclause => 'my_clause',
        alias => $alias,
        column => 'id',
        operator => 'IS NOT',
        value => 'NULL'
    );
    $users_obj->limit(
        subclause => 'my_clause',
        entry_aggregator => 'OR',
        column => 'id',
        value => 3
    );
    $users_obj->close_paren('my_clause');
    ok( $users_obj->build_select_query =~ /LEFT JOIN/, 'LJ is not optimized away');
    is( $users_obj->count, 4, "all users" );
}

    cleanup_schema( 'TestApp', $handle );
}} # SKIP, foreach blocks