在 Perl 中,我使用 DBI 概念连接了数据库。数据库连接和选择表查询在 .pl 文件中工作正常。但是我已经在 .pm 文件中运行了 DBI 数据库连接代码。它不起作用。
请检查代码。
Sample.pl(工作正常)
use DBI;
my $driver = "mysql";
my $database = "marketplace_perl";
my $dsn = "DBI:$driver:database=$database";
my $userid = "root";
my $password = "root";
my $dbh = DBI->connect($dsn, $userid, $password );
my $dbh=connect_db();
my $sth = $dbh->prepare("SELECT UserEmail,UserPassword FROM pj_user where UserEmail=? and UserPassword=?");
$sth->execute($UserEmail,$UserPassword);
Marketplace.pm(不工作)
package Marketplace;
use DBI;
sub connect_db {
my $driver = "mysql";
my $database = "marketplace_perl";
my $dsn = "DBI:$driver:database=$database";
my $userid = "root";
my $password = "root";
my $dbh = DBI->connect($dsn, $userid, $password );
return $dbh;
}
sub login_marketplace {
my $dbh=connect_db();
my $sth = $dbh->prepare("SELECT UserEmail,UserPassword FROM pj_user where UserEmail=? and UserPassword=?");
$sth->execute($UserEmail,$UserPassword);
my $User_count=$sth->rows;
return $User_count
}
返回“Failed to access class (Marketplace): Can\'t locate DBI.pm in @INC (you may need to install the DBI module)”错误信息
请告诉我如何解决数据库问题。
最佳答案
在 marketplace.pm 文件中尝试以下代码。
use ENV;
my $PERL5LIB= $ENV{'PERL5LIB'};
package Marketplace;
BEGIN {
push(@INC, $PERL5LIB);
};
use DBI;
sub connect_db {
my $driver = "mysql";
my $database = "marketplace_perl";
my $dsn = "DBI:$driver:database=$database";
my $userid = "root";
my $password = "root";
my $dbh = DBI->connect($dsn, $userid, $password );
return $dbh;
}
sub login_marketplace {
my $dbh=connect_db();
my $sth = $dbh->prepare("SELECT UserEmail,UserPassword FROM pj_user where UserEmail=? and UserPassword=?");
$sth->execute($UserEmail,$UserPassword);
my $User_count=$sth->rows;
return $User_count
}
关于mysql - Perl 数据库连接在 .pm 文件中不起作用,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/52109044/