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QSqlQuery::prepare: database not open

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  • R Offline
    R Offline
    RekTek249
    wrote on last edited by RekTek249
    #12

    @Taz742 QSqlError("2003", "QMYSQL: Unable to connect", "Can't connect to MySQL server on 'adress.here' (10060)")
    Is the error...

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    • SGaistS Offline
      SGaistS Offline
      SGaist
      Lifetime Qt Champion
      wrote on last edited by
      #13

      Did you check that the user you are using to connect to the database can be used for remote connections ?

      Interested in AI ? www.idiap.ch
      Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

      R 1 Reply Last reply
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      • SGaistS SGaist

        Did you check that the user you are using to connect to the database can be used for remote connections ?

        R Offline
        R Offline
        RekTek249
        wrote on last edited by
        #14

        @SGaist It can.... What is the "2003" and 10060 meaning ? is 2003 the port ?

        Taz742T 1 Reply Last reply
        0
        • R Offline
          R Offline
          RekTek249
          wrote on last edited by
          #15

          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
          
          the_T 1 Reply Last reply
          0
          • R RekTek249

            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
            
            the_T Offline
            the_T Offline
            the_
            wrote on last edited by
            #16

            @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

            -- No support in PM --

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            2
            • R RekTek249

              @SGaist It can.... What is the "2003" and 10060 meaning ? is 2003 the port ?

              Taz742T Offline
              Taz742T Offline
              Taz742
              wrote on last edited by
              #17

              @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.

              the_T 1 Reply Last reply
              0
              • Taz742T Taz742

                @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.

                the_T Offline
                the_T Offline
                the_
                wrote on last edited by
                #18

                @Taz742
                It's not a "title", just an qt internal error number. Same with the other code that is a mysql internal error code

                -- No support in PM --

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                • SGaistS Offline
                  SGaistS Offline
                  SGaist
                  Lifetime Qt Champion
                  wrote on last edited by
                  #19

                  To add to @the_ : the error state that mysql.hostinger.fr is an unknown host. Looks like you are giving the wrong address.

                  Interested in AI ? www.idiap.ch
                  Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                  R 1 Reply Last reply
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                  • SGaistS SGaist

                    To add to @the_ : the error state that mysql.hostinger.fr is an unknown host. Looks like you are giving the wrong address.

                    R Offline
                    R Offline
                    RekTek249
                    wrote on last edited by
                    #20

                    @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 ?

                    R 1 Reply Last reply
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                    • R RekTek249

                      @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 ?

                      R Offline
                      R Offline
                      RekTek249
                      wrote on last edited by RekTek249
                      #21

                      @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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                      • SGaistS Offline
                        SGaistS Offline
                        SGaist
                        Lifetime Qt Champion
                        wrote on last edited by
                        #22

                        Is this user authorised to access the database from outside that machine ?

                        Interested in AI ? www.idiap.ch
                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                        R 1 Reply Last reply
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                        • SGaistS SGaist

                          Is this user authorised to access the database from outside that machine ?

                          R Offline
                          R Offline
                          RekTek249
                          wrote on last edited by
                          #23

                          @SGaist Well it's a website host.... They wouldn't allow you to create hosts that can only connect on that machine i guess.

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                          • SGaistS Offline
                            SGaistS Offline
                            SGaist
                            Lifetime Qt Champion
                            wrote on last edited by
                            #24

                            That I don't know, you should ask them.

                            Interested in AI ? www.idiap.ch
                            Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                            R 1 Reply Last reply
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                            • SGaistS SGaist

                              That I don't know, you should ask them.

                              R Offline
                              R Offline
                              RekTek249
                              wrote on last edited by
                              #25

                              @SGaist Alright... I checked something and apparently for remote you need the user's ip. The control panel needs the ip so I guess I can't make this application public because they wont be able to access the database ?

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                              • SGaistS Offline
                                SGaistS Offline
                                SGaist
                                Lifetime Qt Champion
                                wrote on last edited by
                                #26

                                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.

                                Interested in AI ? www.idiap.ch
                                Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

                                R 1 Reply Last reply
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                                • SGaistS SGaist

                                  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.

                                  R Offline
                                  R Offline
                                  RekTek249
                                  wrote on last edited by
                                  #27

                                  @SGaist I just need to store (INSERT) things in a database... And what is a REST ?

                                  the_T jsulmJ 2 Replies Last reply
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                                  • R RekTek249

                                    @SGaist I just need to store (INSERT) things in a database... And what is a REST ?

                                    the_T Offline
                                    the_T Offline
                                    the_
                                    wrote on last edited by
                                    #28

                                    @RekTek249
                                    See https://www.tutorialspoint.com/restful/

                                    -- No support in PM --

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                                    • R RekTek249

                                      @SGaist I just need to store (INSERT) things in a database... And what is a REST ?

                                      jsulmJ Offline
                                      jsulmJ Offline
                                      jsulm
                                      Lifetime Qt Champion
                                      wrote on last edited by
                                      #29

                                      @RekTek249 Yes, you should implement a REST interface - exposing a SQL database to the public internet isn't a good idea.

                                      https://forum.qt.io/topic/113070/qt-code-of-conduct

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                                      • SGaistS Offline
                                        SGaistS Offline
                                        SGaist
                                        Lifetime Qt Champion
                                        wrote on last edited by
                                        #30

                                        To add to @the_, the tutorial explains thing nicely but there are more lightweight options than a full Java + eclipse + tomcat setup to get started.

                                        Python wise there's the Django REST framework or Flask RESTful

                                        PHP wise there's PHP Slim

                                        There are also other options but you'd have to first share what you have available on your server.

                                        Interested in AI ? www.idiap.ch
                                        Please read the Qt Code of Conduct - https://forum.qt.io/topic/113070/qt-code-of-conduct

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