Wt

Hello Freddy,

I believe an std::vector is saved as a blob type in the database. You can write your own traits classes to define how your raw data structures are to be stored in the database, if Wt::Dbo does not know them. There are a few included in Dbo by default, see Wt/Dbo/StdSqlTraits and its .C file.

Wim.

 You can write your own traits classes to define how your raw data structures are to be stored in the database, if Wt::Dbo does not know them.

There is some example about it ??

I was looking for something like WFile or something like that and aI didn't find nothing. Lokking for more deep, I have found Wt::Dbo::backend::Postgres::blobType()

this method return a char*, which should be the file content, but, How can I define a field like BLOB?? Using a std::vector could be, but I must use bind() function ?? how can I do that ???

that is my doubt my friend !!!

I'm new with witty...

regards

Hello Freddy,

Take a look at the documentation of Wt/Dbo/SqlTraits, and at Wt/Dbo/StdSqlTraits and Wt/Dbo/StdSqlTraits.C, and at WtSqlTraits and WtSqlTraits.C in the Wt source code for example implementations of traits classes. To map your own data structures on Dbo types, you can write a traits class. To store a file as a blob in the database, you can either store the file's contents in a std::vector (for which the traits class already exists), or write one of your own.

Best regards,

Wim.