enum QVariant::Type is obsolete?

JonB

I need to determine the types of the columns returned from a QSqlQuery.
I can access the column definitions via QSqlQuery::record()::field(int). This returns a QSqlField.
http://doc.qt.io/qt-5/qsqlfield.html#type gives me QVariant::Type QSqlField::type() const.
The return type of QVariant::Type is documented at http://doc.qt.io/qt-5/qvariant-obsolete.html#Type-enum under title "Obsolete Members for QVariant"

If it is obsolete, how come QSqlField::type() returns it? What should I be using instead to achieve this?

JKSH

@JonB said in enum QVariant::Type is obsolete?:

What should I be using instead to achieve this?

There's some info at the documentation for QVariant::type(). QVariant::Type has been superseded by QMetaType::Type.

The integral values of the two enums are interchangeable, so you can safely reinterpret the return value of QSqlField::type() as a QMetaType::Type. You can also pass QMetaType::Type values into QSqlField::setType().

If it is obsolete, how come QSqlField::type() returns it?

To maintain backwards-compatibility.

I'd imagine that in Qt 6, all instances of QVariant::Type will be fully replaced by QMetaType::Type.

Taz742

This post is deleted!

JonB

@JKSH
Thanks for that. I did not come across that link, if you follow the links through the manual as I said I did you don't hit http://doc.qt.io/qt-5/qvariant.html#type. I'm good to go on that.

Are you happy with the way I'm saying I determine the "type" for a column returned from the database? I need to know that for arbitrary formatting etc. rules, e.g. suitable column alignment in a table.

JonB

This post is deleted!

JKSH

@JonB said in enum QVariant::Type is obsolete?:

@JKSH
Thanks for that. I did not come across that link, if you follow the links through the manual as I said I did you don't hit http://doc.qt.io/qt-5/qvariant.html#type. I'm good to go on that.

You're welcome :) Looks like a bug/oversight in the documentation generator: https://bugreports.qt.io/browse/QTBUG-68327

Are you happy with the way I'm saying I determine the "type" for a column returned from the database? I need to know that for arbitrary formatting etc. rules, e.g. suitable column alignment in a table.

Yes, I think that's exactly how the designers of QSqlField intended it to be used.