HI all, GeoJSON RFC7946 states that "If a Feature has a commonly used identifier, that identifier SHOULD be included as a member of the Feature object with the name "id", and the value of this member is either a JSON string or number". For example OpenLayers tries to parse the id field to uniquely identify the features inside a GeoJSON feature collection. I've digged how OGR GeoJSON driver treats FIDs during serialization and it seems that it will write it if the OGrFeature has the FID field set [2], but AFAICS QIGS OGR provider doesn't set it unless "the first attribute is the FID and the user has set it". Well, this condition depends on [4], and now I odn't understand how this applies to a QGIS layer being exported to GeoJSON.
Questions: - is there a way to force the OGR provider setting the FID? - could the OGR provider have an option to force it from the export window, like Mapserver does with the USE_FEATUREID option for its output format *?* giovanni [1] https://tools.ietf.org/html/rfc7946#page-11 [2] https://github.com/OSGeo/gdal/blob/trunk/gdal/ogr/ogrsf_frmts/geojson/ogrgeojsonwriter.cpp#L601 [3] https://github.com/qgis/QGIS/blob/master/src/providers/ogr/qgsogrprovider.cpp#L1269 [4] https://github.com/qgis/QGIS/blob/master/src/providers/ogr/qgsogrprovider.cpp#L894 [5] http://mapserver.org/output/ogr_output.html#table-of-contents
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