[Interest] QtSql database insertion issues...

[BRM]

So I dove in more tonight; and discovered a rather dumb mistake - I forgot to initialize the database (e.g load the schema). prepare() had failed sometimes and other times not; seemed to be based on compile. Any how...it failed reliably tonight and when I added the lastError() data to the qDebug() statements it was evident that the tables were missing. Fixed that and...now it works. :)

Thanks for everyone that looked at it, and the ideas.

Now on to finishing the functionality...
Ben 


     On Wednesday, April 22, 2015 12:12 AM, BRM <bm_witness at yahoo.com> wrote:
   

 The "prepare(...)" does seem to work.

One thing that really confuses me is that even though I use the named bindings, it always lists the bindings as '?' in the error messages.

Ben



     On Tuesday, April 21, 2015 11:20 PM, Tony Rietwyk <tony at rightsoft.com.au> wrote:
   

 #yiv8114132949 -- filtered {font-family:Helvetica;panose-1:2 11 6 4 2 2 2 2 2 4;}#yiv8114132949 filtered {font-family:PMingLiU;panose-1:2 2 5 0 0 0 0 0 0 0;}#yiv8114132949 filtered {panose-1:2 4 5 3 5 4 6 3 2 4;}#yiv8114132949 filtered {font-family:Calibri;panose-1:2 15 5 2 2 2 4 3 2 4;}#yiv8114132949 filtered {font-family:Tahoma;panose-1:2 11 6 4 3 5 4 4 2 4;}#yiv8114132949 filtered {panose-1:2 2 5 0 0 0 0 0 0 0;}#yiv8114132949 p.yiv8114132949MsoNormal, #yiv8114132949 li.yiv8114132949MsoNormal, #yiv8114132949 div.yiv8114132949MsoNormal {margin:0cm;margin-bottom:.0001pt;font-size:12.0pt;}#yiv8114132949 a:link, #yiv8114132949 span.yiv8114132949MsoHyperlink {color:blue;text-decoration:underline;}#yiv8114132949 a:visited, #yiv8114132949 span.yiv8114132949MsoHyperlinkFollowed {color:purple;text-decoration:underline;}#yiv8114132949 span.yiv8114132949EmailStyle17 {color:#1F497D;}#yiv8114132949 .yiv8114132949MsoChpDefault {font-size:10.0pt;}#yiv8114132949 filtered {margin:72.0pt 72.0pt 72.0pt 72.0pt;}#yiv8114132949 div.yiv8114132949WordSection1 {}#yiv8114132949 Hi Ben,   Does the prepare work?   I assume the database must be open, or you would get a different message.   Hope that helps,   Tony    From: interest-bounces+tony=rightsoft.com.au at qt-project.org [mailto:interest-bounces+tony=rightsoft.com.au at qt-project.org] On Behalf Of BRM
Sent: Wednesday, 22 April 2015 12:42 PM
To: Qt Project
Subject: [Interest] QtSql database insertion issues...  I've been out of the Qt loop for a little bit; but I'm working to bring myself back up to speed.I'm presently working on a small project that is basically a GUI equivalent of md5sum/sha1sum where I'm attempting to store the data in a SQLite Database during run-time. I've already done a command-line version using python, and I'm pulling the SQL statements from there. However, I am having trouble with the QSqlQuery prepared statements. The entire code chunk is here:
https://github.com/BenjamenMeyer/qtmd5gui/blob/branch_qt4_base/src/hash_db.cpp  I'm building the project on Kubuntu 14.10, using the Qt4.8 libraries provided by the distro.  To summarize the code, I'm doing the following:      QSqlQuery insertion(myDb);    insertion.prepare("INSERT INTO master_directory (hash, path) VALUES(:hash, :path)");    insertion.bindValue(":hash", "some hash");    insertion.bindValue(":path", "/some/path");    if (!insertion.exec()) qDebug() << "insertion failed. Log errors and value bindings";  I've added debug output that shows the values being bound; however, it continues to complain about a parameter mismatch.  You can see the output here:https://gist.github.com/BenjamenMeyer/dffe01b702dc8f507c17  I've tried binding both by name (preferred) and by order. (I have a C Preprocessor Define to control it); but neither are working.  This is my first time really playing with a database via Qt.What am I doing wrong?  TIA,  Ben  
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