Postgresql driver is not found

alxdef

this->app_conn = QSqlDatabase();

  this->app_conn.addDatabase(this->db_type);
  this->app_conn.setDatabaseName(this->db_name);
  this->app_conn.setHostName(this->db_host);
  this->app_conn.setPort(this->db_port);
  this->app_conn.setUserName(this->user_name);
  this->app_conn.setPassword(this->user_password);

this->db_type is "QPSQL".

SGaist

You are using QSqlDatabase in the wrong manner.

addDatabase is a static member, you are manipulating an invalid object.

As the QSqlDatabase warns about: do not store local variables of that type. The class already provides everything needed to handle the objects you create from it.

alxdef

@SGaist said in Postgresql driver is not found:

QSqlDatabase

Many thanks! Connected Ok.

alxdef

So is it necessary to grab all "Debug" DLLs and place them to "Release"? How to avoid this crutch?

SGaist

What debug dll ?

alxdef

@SGaist

\sqldrivers\qsqlpsql.dll
\platforms\qwindows.dll
\vcruntime140.dll
\Qt5Sql.dll
\Qt5Core.dll
\msvcrt.dll
\libstdc++-6.dll
\libssl-1_1-x64.dll
\libpq.dll
\libintl-8.dll
\libiconv-2.dll
\libcrypto-1_1-x64.dll

SGaist

Ah, you meant the content of the Debug folder.

One thing you can do is go in the Run part of the Project panel and modify the PATH environment variable to include the path to these dlls.

alxdef

@SGaist
I've made additional folder inside my project and move all DLLs into it. After that add path to this folder in PATH variable. It works but this method is crutch anyway…

SGaist

On Windows there's two way to find .dlls:

they are in the same folder
they are in a folder in your PATH environment variable

Qt Creator does the change for Qt for you based on which kit you are using. Since you use external dependencies, it's up to you to provide a mean to find your dependencies dlls. And no, modifying your system's PATH environment is not the correct way.

Bonnie

@alxdef
Why?
On windows the most usual way is just putting the dependency dlls with the exe, famous software products also do like that.