Question

Im trying to insert values into a mysql database:

database->queryDatabase("INSERT INTO recordings (title, recording, kit, date) VALUES ('"+recordingTitle+"', '"+ recordingArray +"', '"+kitID+"', '"+recordingDateTime+"')");

database->queryDatabase just sends it to my database connection.

The problem I am having is that:

error: no match for 'operator+' in 'operator+(const QString&, const char*)(((const char*)"\', \'")) + ((Studio*)this)->Studio::recordingDateTime

Each var is of type:

QString recordingTitle;
std::vector<std::pair<int, QString> > recordingArray;
int kitID;
QDateTime recordingDateTime;

How can I add each one to the database? The vector and QDateTime types do not like the + in the query string.

Tahnks

Answer 1

There’s no implicit conversion of QDateTime to QString. You’ll need to explicitly convert it:

database->queryDatabase("INSERT INTO recordings (title, recording, kit, date)"
    " VALUES ('" + recordingTitle + "', '" + recordingArray +"', '" + kitID + 
        "', '" + recordingDateTime.toString() + "')");

You might have to provide a format specifier to get it into a format MySQL likes.