Any idea? Em qui, 22 de out de 2015 às 13:30, Daniel França <[email protected]> escreveu:
> Hi guys, > I'm developing a single file ORM library for QML. > For now it's doing most of the main operations on tables. > You can see it here, with a basic documentation as well: > https://github.com/danielfranca/quickmodel > > But now I'm trying to implement a way to have migrations, and can't find a > good solution for that. > > I don't want anything complex, my goal will be to have something that you > simply change the table you want and increase the database version (then > the tables gonna be recreated and populated with existent data). > > I know about the changeVersion method on LocalStorage: > http://doc.qt.io/qt-5/qtquick-localstorage-qmlmodule.html > > But I'm not sure about how to use it. > i.e: > I call *openDatabaseSync *with version 1.0 and create my tables. > Then I change it to version 1.1 and call *changeVersion("1.0", "1.1")* > > But the next time my app runs it's not gonna open the database, instead > it'll give me an error "*Version mismatch*", because now the database ini > says that the database version is *1.1*, not *1.0.* > > And if I just change the open parameters to send *"1.1"*, it's not gonna > even open in the first run, giving the same error, because ini file will > say that the version is *1.0*, not *1.1.* > > To workaround this issue I'm just playing around with my own version > control, and ignoring the builtin QML solution. > > But it looks wrong =/ > Probably I'm missing something and couldn't understand correctly. > Does anyone can help me find out a good solution? > > Best, > Daniel > >
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