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I have a templated method for convenience that fetches items from the db like this (id is a QString) -

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QSharedPointer<T> item = QSharedPointer<T>(new T(id));
qx::dao::fetch_by_id(item);

which results in this (T = Artist) -

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[QxOrm] 'qx::dao' internal error <fetch by id> : SELECT Artist.name AS Artist_name_0 FROM Artist WHERE Artist.name = :name
[QxOrm] sql query returns no data

This is expected, as the table is actually empty. However, if I use QxSession::fetchById instead-

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qx::QxSession session;
QSharedPointer<T> item = QSharedPointer<T>(session.fetchById<T>(id));

I get this (T = Artist) -

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[QxOrm] execute sql query failed : SELECT Artist.name AS Artist_name_0 FROM Artist WHERE Artist.name = :name
Parameter count mismatch

Now, the queries in both the cases look like the same SQL query, so probably something is wrong with :name. How do I debug this?

Hi,

Strange because session.fetchById<T>() will call exactly the same code ==> qx::dao::fetch_by_id()

Could you please provide your qx::register_class<Artist>() function ?
Then I will try to reproduce your problem...

qxorm wrote:Strange because session.fetchById<T>() will call exactly the same code ==> qx::dao::fetch_by_id()

Exactly, I even put few qDebugs in the fetch_by_id code, the id looks to be set correctly.
Anyway, here's the register_class function https://projects.kde.org/projects/extra ... st.cpp#L28

Sorry but I'm not able to reproduce it !

qx::dao::fetch_by_id<T>() and session.fetchById<T>() give me exactly the same result :

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[QxOrm] 'qx::dao' internal error <fetch by id> : SELECT author.author_id AS author_author_id_0 FROM author WHERE author.author_id = :author_id
[QxOrm] sql query returns no data

Could you try to reproduce it using qxBlog sample project in ./test/ directory of QxOrm package please ?
The author class seems to be equivalent to your Artist class.

But I really don't know what could happen in your case because session.fetchById<T>() calls exactly the same code as qx::dao::fetch_by_id<T>() => so really strange !
Are you sure you have clean all (QxOrm lib + your project) and rebuild all (QxOrm lib + your project) ?