[Qgis-user] QGIS 2.10.1 adding PostGIS Views

[James Keener]

We also need to ask what qgis is doing with this and why we need to bug the user about it at all. 

Why do we not big the user about tables without a primary key? If tables can be loaded without a pk, why can't views.

Why can I select non-unique columns as primary keys and after loading the layer get no error?

Are these also bugs? Should I make (or find?) tickets for them?

Jim

On September 1, 2015 11:49:23 AM EDT, Matthias Kuhn <matthias at opengis.ch> wrote:
>Hi,
>
>I would like to second Andreas, what we need is an improvement in the
>UI
>to make the user aware of the problem.
>
>My proposal (please review and improve!!!!)
>
>1. Let the user choose whatever table/view he likes. Don't disable any
>items.
>2. If there are tables without a PK open a second modal dialog with an
>explanation of the problem and offer to select a pk from a combobox.
>
>-------------
>
>3. Optional: Add a button "search suitable pk" which looks for a
>suitable unique column.
>4. Optional: Add a selection "read-only" to the combobox and do some
>row_number() or other black magic and warn the user with a big red
>dialog that he's about to do something very dangerous, unreliable and
>that his warranty is now very void.
>
>Best,
>Matthias
>
>On 09/01/2015 05:36 PM, Andreas Neumann wrote:
>> Hi,
>>
>> I would regard the loading of layers from a database something
>> "relatively advanced". Normally I prepare ready to use QGIS project
>to
>> my users who edit and query our GIS data where they don't have to
>> bother with loading layers.
>>
>> But you are correct that it can be different persons - the one who
>> creates the view and the ones who are loading them.
>>
>> You are welcome to improve the situation/GUI, but please don't go
>back
>> to the old behavior where it is an assumption that the first column
>in
>> the list is always the primary key.
>>
>> Andreas
>>
>> On 01.09.2015 14:51, James Keener wrote:
>>> Why are you assuming the user who created the view is the one using
>>> QGIS?
>>>
>>> Jim
>>>
>>> On 09/01/2015 08:50 AM, Andreas Neumann wrote:
>>>> Hi,
>>>>
>>>> I agree with Jürgen - better let the user choose the pkey column.
>If
>>>> the
>>>> user knows how to create a Postgis View he also knows how to select
>a
>>>> primary key column.
>>>>
>>>> Andreas
>>>>
>>>> On 01.09.2015 14:37, Jürgen E. Fischer wrote:
>>>>> Hi Sandro,
>>>>>
>>>>> On Tue, 01. Sep 2015 at 13:48:33 +0200, Sandro Santilli wrote:
>>>>>> I agree with Luca this should have been better not backported to
>>>>>> 2.8.3.
>>>>>> Only proper bugs should be backported, and this was a (debatable)
>>>>>> GUI enhancement, as far as I can tell.
>>>>> We intend to only backport fixes and not bugs. ;)
>>>>>
>>>>> You were always supposed to select the key column - preselecting
>>>>> the first
>>>>> column was the bug (also debatable).  And #11317 is a ticket that
>>>>> demonstrates
>>>>> there were unaware users.
>>>>>
>>>>> That the first column often happens to be the primary key and and
>>>>> the combobox
>>>>> is not lexically sorted is somewhat pure luck - and unless you
>>>>> avoid having the
>>>>> key verified (using "use estimated metadata"), keeping a wrongly
>>>>> select
>>>>> column will make the layer to insert invalid.
>>>>>
>>>>> But I agree that the tooltip that you get on disabled lines (not
>>>>> only for the
>>>>> key selection, but also geometry type and srid) might not be
>>>>> visible enough
>>>>> (but that IMHO would be just a GUI enhancement).
>>>>>
>>>>>
>>>>> Jürgen
>>>>>
>>>>>
>>>>>
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>>>>> Qgis-user at lists.osgeo.org
>>>>> http://lists.osgeo.org/mailman/listinfo/qgis-user
>>>>
>>>>
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