getting already open database connection

[user4592357]

@Christian-Ehrlicher
the error is from QSqlQuery::lastError().
and it worked with default connection

[Christian Ehrlicher]

Please show the query, make sure that the db is really open at the time you're trying to execute the query.

[SGaist]

Hi,

To add to @Christian-Ehrlicher, I am not sure that using a file path is necessarily a good idea for a connection name.

[user4592357]

@SGaist
then what should i be using?

[SGaist]

A meaningful identifier, just the name of the database, etc. That's up to you.

[user4592357]

@SGaist
yeah something unique, so i thought file path would be more unique then fine name

[SGaist]

In any case, you should do as @Christian-Ehrlicher wrote: get the error from the failed query.

[user4592357]

@SGaist
the parameter mismatch error is the text given by lastError()

[SGaist]

And what is the query ? The one returned by lastQuery ?

[user4592357]

actually prepare() was failing and i got the error from sql query at right after prepare() and it was meaningful