On 14.07.2017 00:01, Martin Dobias wrote:
Hi Sandro
On Wed, Jul 12, 2017 at 11:15 AM, Sandro Mani <[email protected]> wrote:
The problem is that if one of the changes to be committed is refused by the
provider, you're stuck not being able to commit the entire set of changes.
And, since we are dealing with invalid geometries, it is not that unlikely
that this occurs. Committing directly to the provider ensures that we know
immediately whether a change is valid or not.
Out of curiosity, which providers tend to refuse features? I thought
that most providers will be happy to commit also invalid geometries
given that they do not mind storing them. Are geometries refused only
if they are invalid or are there also other related issues? Maybe it
would help if we did not allow users to commit invalid geometries? (or
only with big red warning that they should expect havoc, possibly end
of the world)
A typical example are attribute collisions when columns are marked as
unique (and some geometry checker methods fix errors by merging features
geometries and combining attributes via some scheme, and combining
attributes does not always end up well).
I can't remember if I also encountered cases where commits were refused
because of the actual geometry being invalid.
That said, as mentioned elsewhere in the thread, having the edit mode
inbetween causes headaches because the user can interfere by manually
changing geometries and the plugin loses track of what's going on.
Sandro
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