[PyQt] QSortFilterProxyModel::sort() not sorting on column types
jnbarchan at gmail.com
Fri Feb 1 09:43:13 GMT 2019
I use Qt/PyQt 5.7, the standard distribution supplied for Ubuntu 18.04.
I have a QSortFilterProxyModel wrapped around a QStandardItemModel as its
source model. I try to use QSortFilterProxyModel::sort() to sort by column
I have a column of Python type datetime.date. When I call the sort(),
there is no "warning" but *nothing happens*. The sort does not rearrange
the items at all. They are initially "randomly" ordered in rows, and the
rows simply retain their current order. It does *not* even reorder by
string value. It is as though it simply decides they are "unorderable".
When I sort instead by a Python str column they *do* get reordered. FWIW,
I have another column of Python type decimal.Decimal and sorting by that
too does nothing, even though I think that should be convertible to float/
double. However, that may complicate matters so let's stick to the
datetime.date case, I am just mentioning it in case it's relevant.
It took me a long time to realise where the problem lies. I have a
workaround: I *explicitly* change all my values in the model from
datetime.date to QDate(value) and now it does sort.
But my understanding/experience from other PyQt methods is that it does
this kind of Python type -> QVariant conversion for you behind the scenes
itself. I shouldn't have to change my types or write special code.
Is this a bug? Is this in my PyQt 5.7 only?
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