Check if the the FIELDS_MAPPING type can be passed to qgis_process

[cmber]

I'm trying to use the refactor fields algorithm in R (Win 10) but can't make it work. The code I'm using is:

test<- qgis_run_algorithm(
"native:refactorfields",
INPUT = shape,
FIELDS_MAPPING = "[{'expression': '"id"','length': 10,'name': 'id','precision': 0,'type': 4},{'expression': '"nom"','length': 80,'name': 'nom','precision': 0,'type': 10},{'expression': '"clon"','length': 80,'name': 'clon','precision': 0,'type': 10},{'expression': '"use"','length': 80,'name': 'use','precision': 0,'type': 10},{'expression': '"date"','length': 10,'name': 'date','precision': 0,'type': 14},{'expression': '"area"','length': 10,'name': 'area','precision': 1,'type': 6}]",
#OUTPUT = TRUE,
.quiet = TRUE
)

The FIELDS_MAPPING argument was copied directly from QGIS. The error I get is:

Error in processx::run(path, ...) :
System command 'qgis_process-qgis-ltr.bat' failed, exit status: 1, stderr:
E> ERROR: An error was encountered while checking parameter values
E> Incorrect parameter value for FIELDS_MAPPING

Any feedback will be appreciated.

Best
CM

[paleolimbot]

Are you sure that your quotes are lined up correctly for your FIELDS_MAPPING value? They look a bit off from here but that could be a copy/paste error.

That said I have a feeling this won't work until we implement the JSON interface for the command-line runner, since the FIELDS_MAPPING value isn't a simple string->object conversion.

[cmber]

I copied the field mapping argument from a python file where it runs just fine. So, I guess it could be the second reason you gave. Thanks

[paleolimbot]

Yes, but in R you probably have a problem because you have nested single and double quotes (so you might have to escape all the double quotes). (But it probably is the second reason I gave...)

[paleolimbot]

Closing this to keep track of in #56!