[Qgis-user] Geoprocessing dissolve tool

[Julie Pierson]

Thanks Bernhard, you're right, I forgot to pass this parameter in my 
script. It solves the problem for my extension, but doesn't if you try 
to simply use the dissolve tool (unless I'm missing something ?)
Julie.

Le 21/09/2015 11:47, Bernhard Ströbl a écrit :
> Hi Julie,
>
> no, I don't think so. You could, of course, download the current 
> version from the repo and replace it in your installation. Otherwise 
> you have to tell processing that you do want to use a dissolve field.
>
> Bernhard
>
> Am 21.09.2015 um 11:29 schrieb Julie Pierson:
>> Thanks Ralf and Bernhard for your answers.
>>
>> Sorry, my message wasn't clear, I'm trying to use the dissolve tool from
>> the processing toolbox. Other dissolve tools won't do, since I use this
>> tool for an extension I created (dissolve with stats), which calls the
>> qgis:dissolve algorithm from the processing toolbox.
>>
>> I'm using QGIS 2.8.3 Wien. Does it mean I'm not using your patch 
>> Bernhard ?
>>
>> Thanks again,
>>
>> Julie.
>>
>>
>> Le 21/09/2015 11:11, Bernhard Ströbl a écrit :
>>> Hi,
>>>
>>> I worked on the dissolve tool recently , and the work got commited a
>>> couple days ago [1]
>>> So, if you are using current master, you must set the dissolve field
>>> for the layer. If you are using a stable version of QGIS (e.g. 2.10)
>>> you must untick the checkbox "Dissolve all (do not use field)". I
>>> recommend to use my patch because it is a lot faster than the old
>>> algorithm.
>>>
>>> Bernhard
>>>
>>> [1]
>>> https://github.com/qgis/QGIS/commit/116089e6ec0bd9bfd15395206bd6e880561da859 
>>>
>>>
>>>
>>> Am 21.09.2015 um 10:42 schrieb Julie Pierson:
>>>> Hi all,
>>>>
>>>> I tried using the dissolve tool from the QGIS geoprocessing tools and
>>>> all features get dissolved together, resulting in only one feature,
>>>> regardless of the dissolve field. I tried with several datasets. Do 
>>>> you
>>>> have the same problem or is it only me ? I've used this tool in the
>>>> past, and it worked ok.
>>>>
>>>> Thanks for your help !
>>>>
>>>> Julie.
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>>>>
>>>>
>>>
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>
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