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<p>Hi Ujaval,</p>
<p>Thanks for the "hacky" idea ;-)</p>
<p>I am happy to report that it worked for me.</p>
<p>For the long run, it would be good to have an algorithm to extract a string from an attribute of a selected feature (something like attribute(get_feature(expression_to_get_feature),attribute) ) or at least an "Expression Executor" that outputs a string. Expressions can do a lot, but getting a string output from an Expression seems to be impossible.</p>
<p>Anyway, I can progress now with the rest of my model.</p>
<p>Thanks again,</p>
<p>Andreas</p>
<p id="reply-intro">On 2020-08-11 10:15, Ujaval Gandhi wrote:</p>
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<div dir="ltr">I can think of a slightly hacky way. Use the 'Basic Statistics for Field' algorithm, and since your field will have a single value, use either the Minimum or Maximum value output from it (works for string fields too) as the parameter for another algorithm.<br clear="all" />
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<td style="padding: 0px; font-size: 12pt; font-family: Arial,sans-serif; font-weight: bold; color: #3d3c3f;"><span style="color: #00afef;">Ujaval Gandhi</span></td>
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<div class="v1gmail_attr" dir="ltr">On Tue, Aug 11, 2020 at 1:23 PM Andreas Neumann <<a href="mailto:a.neumann@carto.net" rel="noreferrer">a.neumann@carto.net</a>> wrote:</div>
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<p>Hi,</p>
<p>In a model I aggregate values to a single feature. Then I would like to extract a specific aggregated attribute to a string so I can use it as the input parameter of another algorithm.</p>
<p>I fail to find a way to do that. Aggregation works fine, string concatenation as well, but I fail to find a way to extract an attribute of a single feature to a string.</p>
<p>Any ideas?</p>
<p>I'm on QGIS 3.10, but if necessary I could also use a newer QGIS version.</p>
<p>Thanks,</p>
<p>Andreas</p>
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