output column prexif added

ghtmtt · ghtmtt · commit f8339c9b970d · 2018-07-12T10:27:03.000+02:00
diff --git a/python/plugins/processing/algs/qgis/RasterSampling.py b/python/plugins/processing/algs/qgis/RasterSampling.py
@@ -37,6 +37,7 @@
                        QgsRaster,
                        QgsProcessing,
                        QgsProcessingParameterRasterLayer,
+                       QgsProcessingParameterString,
                        QgsFields,
                        QgsProcessingUtils,
                        QgsProcessingException,
@@ -50,6 +51,7 @@ class RasterSampling(QgisAlgorithm):
 
     INPUT = 'INPUT'
     RASTERCOPY = 'RASTERCOPY'
+    COLUMN_PREFIX = 'COLUMN_PREFIX'
     OUTPUT = 'OUTPUT'
 
     def name(self):
@@ -83,6 +85,13 @@ def initAlgorithm(self, config=None):
             )
         )
 
+        self.addParameter(
+            QgsProcessingParameterString(
+                self.COLUMN_PREFIX,
+                self.tr('Output column prefix'), 'rvalue'
+            )
+        )
+
         self.addParameter(
             QgsProcessingParameterFeatureSink(
                 self.OUTPUT,
@@ -104,6 +113,12 @@ def processAlgorithm(self, parameters, context, feedback):
             context
         )
 
+        columnPrefix = self.parameterAsString(
+            parameters,
+            self.COLUMN_PREFIX,
+            context
+        )
+
         if source is None:
             raise QgsProcessingException(self.invalidSourceError(parameters, self.INPUT))
 
@@ -113,7 +128,7 @@ def processAlgorithm(self, parameters, context, feedback):
         # append field to vector as rasterName_bandCount
         for b in range(sampled_rasters.bandCount()):
             raster_fields.append(QgsField(
-                'rvalue_' + str('{}'.format(b + 1)), QVariant.Double
+                columnPrefix + str('_{}'.format(b + 1)), QVariant.Double
             )
             )
 
