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Thread: database open returns false

  1. #1
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    Default database open returns false

    I create a QSqlDatabase object an then I open it.

    Qt Code:
    1. db=QSqlDatabase::addDatabase("qwe.db");
    2. db.open();
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    after that isOpen() and isValid() return true.

    After that when I want to connect database I wote this:

    Qt Code:
    1. if(!db.isOpen()) -->returns false. but I never close db until app closing
    2. {
    3. db.open(); -->it returns false
    4. }
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    after that isOpen() and isValid() return false;
    But my queries work and I can get data from database.

    What is wrong here?
    Last edited by ahmetturan; 21st January 2014 at 13:32.

  2. #2
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    Default Re: database open returns false

    Quote Originally Posted by ahmetturan View Post
    I create a QSqlDatabase object an then I open it.

    Qt Code:
    1. db=QSqlDatabase::addDatabase("qwe.db");
    2. db.open();
    To copy to clipboard, switch view to plain text mode 

    after that isOpen() and isValid() return true.
    I doubt they do.
    What is wrong here?
    You are misusing QSqlDatabase::addDatabase(). I suggest you read the Detailed Description again.

  3. #3
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    Default Re: database open returns false

    I am sorry @ChrisW67. I copy-paste wrongly.
    My code:

    Qt Code:
    1. db=QSqlDatabase::addDatabase("QSQLITE");
    2. db.setDatabaseName("qwe.db");
    3. db.open();
    To copy to clipboard, switch view to plain text mode 

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