QSqlQuery::prepare: database not open
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What exact error message do you get from your QSqlDatabase object ?
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Hey, I started SQL today and I was wondering why it says db isn't open. Note: I had trouble with another error saying the driver wasn't found or something and I added a bunch of files to system PATH. Here is my code.
void w::database(){ QSqlDatabase db = QSqlDatabase::addDatabase("QMYSQL"); db.setHostName("Host"); db.setDatabaseName("Name"); /* In my real code, I set the real db.setUserName("Username"); stuff here */ db.setPassword("Password"); if (db.open()) { QMessageBox msgBox; msgBox.setText("DB OPENED"); msgBox.exec(); } QSqlQuery query(db); query.prepare("INSERT INTO person (Username, Password, summ, Email) " "VALUES (:user, :pass, :summ, :mail)"); query.bindValue(":user", Username); // I do have variables set earlier query.bindValue(":pass", Password); query.bindValue(":summ", summ); query.bindValue(":mail", Email); query.exec(); }For some reasons, when I press the button (which launch this method) if I have the db.open part, It "doesn't respond". Help anyone... I searched on internet but didn't find anything that solved my problem...
ThanksQSqlQuery query(db); query.prepare("INSERT INTO person (Username, Password, summ, Email) " "VALUES (:user, :pass, :summ, :mail)"); query.bindValue(":user", Username); // I do have variables set earlier query.bindValue(":pass", Password); query.bindValue(":summ", summ); query.bindValue(":mail", Email); query.exec();The mistake is not giving you anything error?
please #include "QSqlError" and
if (db.open()) { QMessageBox msgBox; msgBox.setText("DB OPENED"); msgBox.exec(); } else{ qDebug() << db.lastError() }By doing so we can understand what the problem is about anyway...
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Did you check that the user you are using to connect to the database can be used for remote connections ?
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Did you check that the user you are using to connect to the database can be used for remote connections ?
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I tried it on another server and it gives the following error..
QSqlError("2005", "QMYSQL: Unable to connect", "Unknown MySQL server host 'mysql.hostinger.fr' (0)") QSqlQuery::prepare: database not open@RekTek249
Again: are you sure you are allowed to establish a remote connection to the database?- check user permission
- check if port is correct
- check if port is reachable from remote
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@RekTek249 said in QSqlQuery::prepare: database not open:
It can.... What is the "2003" and 10060 meaning ? is 2003 the port ?
2003 is not a port name, so let's say the title of the problem.
Do what you want.
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@RekTek249 said in QSqlQuery::prepare: database not open:
It can.... What is the "2003" and 10060 meaning ? is 2003 the port ?
2003 is not a port name, so let's say the title of the problem.
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To add to @the_ : the error state that
mysql.hostinger.fris an unknown host. Looks like you are giving the wrong address. -
@SGaist When I go to the "remote mysql" part of the site, it gives an access host... do i gotta use this as the hostname ?
@RekTek249 If that's what i do, it gives that error:
QSqlError("1045", "QMYSQL: Unable to connect", "Access denied for user 'rektek_write'@'*ip here*.' (using password: YES)")If it's a permission problem, what do I need to do ? I have the insert one because that's the only thing I need to do...
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Is this user authorised to access the database from outside that machine ?
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That I don't know, you should ask them.
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Then implement a REST service to expose what you need for your application.
What exactly are you trying to implement ? Because currently it seems you are trying to do server-side stuff from your application.
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Then implement a REST service to expose what you need for your application.
What exactly are you trying to implement ? Because currently it seems you are trying to do server-side stuff from your application.
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@RekTek249 Yes, you should implement a REST interface - exposing a SQL database to the public internet isn't a good idea.
