On 25-10-16 13:56, Matthias Kuhn wrote:
Hi
Oh yes, it's true ! You are right. I tested. :(
So I am asking: what is the reason why we did this ?
What you call "feature" is a problem for all those who need to share
data with users who have an older version of QGIS, for one reason or
another.
I am wrong ? What do you think ?
Regards
Geo
Nothing has been explicitly done to prevent it.
The "feature" is a warning which you can interpret as "It might or might
not work in your scenario. Before you rely on backporting projects in
production scenarios, test it carefully.".
Or test one version and stick to that within a project which is the
safest choice.
Changing this behavior would be a considerable additional amount of work
and slow down development of new features (and there would still be no
guarantee).
To state it perhaps more explicitly, this is not a 'feature'. It is a
'consequence' of the development or improvements of features in QGIS.
This is basically a choice that has between made to avoid spending too
much time on making project (.qgs) files back-ward compatible, as
explained by Matthias. This may indeed be a problem for users (it has
been for me in the past). But QGIS does provide a clear warning that
your project files may not be backward compatible, to help users to run
into problems later. It would have been nice to have some form of
backward compatibility, but I understand why this may not be feasible,
and I am happy I am being warned in advance.
Regards
Matthias
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