[QGIS-Developer] $scale vs @map_scale - QGIS v2 vs v3

[Andreas Neumann]

Hi Matthias, 

Yes - I will do the find and replace in text editor. 

But what is the reason that behaviour was changed? 

Is there a technical reason to do this change? 

For the users such changes are always a bit annoying of course ... but
if there is a technical reason (and I understand why this was changed),
then I feel a bit better when I do all this find and replace work ;-) 

Andreas 

On 2019-01-21 13:57, Matthias Kuhn wrote:

> Hi Andreas, 
> 
> I think the easiest approach is to search and replace in the project files. 
> 
> Expressions are in so many places in QGIS, it's close to impossible to write code that finds them all and updates. 
> 
> Bests 
> 
> Matthias
> 
> On 1/21/19 1:52 PM, Andreas Neumann wrote: 
> 
>> Hi, 
>> 
>> When migrating our version 2 to version 3 projects, most of our symbology needs revision, because our data-defined properties used a lot the "$scale" variable. 
>> 
>> What is the exact reason that $scale fails in version 3 and had been replaced by @map_scale? 
>> 
>> Is there really no upgrade path for this? We have many, many projects, and almost all of them need to be upgraded in version 3 to use "@map_scale" instead of "$scale". 
>> 
>> Thanks for your reply, 
>> 
>> Andreas 
>> 
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> 
> -- 
> 
> Matthias Kuhn
> matthias at opengis.ch 
> +41 (0)76 435 67 63 [1]
> [2]

 

Links:
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