[Qgis-user] Multiplicity in Model Input (Layers)

[Andreas Neumann]

Hi Andrew,

Yes, the "Multiple Input" input type should do the trick. After that 
input parameter you'd normally have to merge all input files/layers into 
one. The "Merge vector layers" transformer seems to be one of the very 
few (or the only) algorithm that seems to accept multi-layer input.

Of course the "Merge vector layers" algorithm expects the layer to have 
the same structure, otherwise you'll have some really funny and 
unpredictable results.

Greetings and hope this helps,

Andreas

On 2021-07-15 09:46, Alexandre Neto wrote:

> Hi Andrew,
> 
> You need to use the "multiple input" input type.
> 
> Best regards
> 
> Alexandre Neto
> User support
> www.qcooperative.net [1]
> 
> A quinta, 15/07/2021, 08:33, Andrew Hughes <ahhughes at gmail.com> 
> escreveu:
> 
>> Hi All,
>> 
>> Could any provide some advice as I am new to this and need some 
>> guidance please.
>> 
>> My model needs to consume data from MULTIPLE Esri rest layers. I can 
>> do this for on a 1:1 basis where I manually add 1 input vector layer 
>> per esri rest layer. But that's not great. This model is not easily 
>> reusable, as the number of layers always varies.
>> 
>> Q1: The merge processor takes in a multi-layers on a single input - 
>> but I can't see how this is done in a model. Can anyone please 
>> explain?
>> 
>> Q2: Is is possible for me to write a python processor that doesn't 
>> require any project layers as input, it can create the layers itself 
>> (in code/config) and feed them into the merge processor and output the 
>> single merged layer?
>> 
>> Thanks in advance
>> Andrew
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