přidán číselník a vytvořena funkce

docs/source/firstDraft.py

@@ -1,17 +1,56 @@
-from qgis.core import QgsProject
-
-csv = QgsProject.instance().mapLayersByName('SC_D_POZEMKU')[0]
-csvField = 'KOD'
-layer = QgsProject.instance().mapLayersByName('Parcely')[0]
-layerField = 'DruhPozemkuKod'
-
-joinObject = QgsVectorLayerJoinInfo()
-joinObject.setJoinLayerId(csv.id())
-joinObject.setJoinFieldName(csvField)
-joinObject.setTargetFieldName(layerField)
-joinObject.setPrefix('g')
-joinObject.setUsingMemoryCache(True)
-joinObject.setJoinLayer(csv)
-
-layer.addJoin(joinObject)
-QgsProject.instance().addMapLayer(layer)
+import os
+from qgis.core import QgsProject, QgsVectorLayer, QgsVectorLayerJoinInfo
+
+def add_join_csv_file(target_layer: QgsVectorLayer, csv_layer: QgsVectorLayer, target_field: str = "DruhPozemkuKod", csv_field: str = "KOD", csv_subset: list = ["NAZEV"]) -> QgsVectorLayer:
+    """Performs left outer join from 'target_layer' to 'csv_layer'. Initially used to perform a join from 'Parcely' to code list of land types.
+
+    @type target_layer: QgsVectorLayer
+    @param target_layer: A layer on which the join will be performed
+    @type csv_layer: QgsVectorLayer
+    @param csv_layer: A layer which will be joined to the 'target_layer'
+    @type target_field: str
+    @param target_field: Name of the field of the 'target_layer' that will be used for join
+    @type csv_field: str
+    @param csv_field: Name of the field of the 'csv_layer' that will be used for join
+    @type csv_subset: list
+    @param csv_subset: Subset of fields to be used from joined layer
+
+    @rtype: QgsVectorLayer
+    @returns: A vector layer ('target_layer') with left outer join to other vector layer ('csv_layer') 
+    """
+    joinObject = QgsVectorLayerJoinInfo()
+    joinObject.setJoinLayerId(csv_layer.id())
+    joinObject.setJoinFieldName(csv_field)
+    joinObject.setTargetFieldName(target_field)
+    joinObject.setUsingMemoryCache(True)
+    joinObject.setPrefix("")
+    joinObject.setJoinLayer(csv_layer)
+    joinObject.setJoinFieldNamesSubset(csv_subset)
+
+    target_layer.addJoin(joinObject)
+
+    return target_layer 
+
+
+def rearrange_columns(self, layer: QgsVectorLayer, new_order: list) -> None:
+    # rearrange columns: https://gis.stackexchange.com/a/445885 (ALE POTREBUJI CELEJ LIST SLOUPCU ASI)
+    pass
+
+def main():
+    uri ="c:\\Users\\Vojta\\_CVUT\\2023_2024\\FGIS\\ruianTest.gpkg|layername=parcely"
+    parcely_layer = QgsVectorLayer(uri, "parcely", "ogr")
+    parcely_field = "DruhPozemkuKod"
+
+    # headTail = os.path.split(os.path.dirname(__file__)) # TODO: po zarazeni do MainApp upravit cestu
+    path = "file:///c:\\Users\\Vojta\\_CVUT\\2023_2024\\FGIS\\data\\SC_D_POZEMKU.csv?delimiter=;"
+    csv_layer = QgsVectorLayer(path, "DruhPozemku", "delimitedtext")
+    csv_field = "KOD"
+
+
+
+    mylayer = add_join_csv_file(parcely_layer, csv_layer, parcely_field, csv_field)
+    QgsProject.instance().addMapLayer(mylayer)
+    new_order = []
+
+if __name__ in ('__main__', '__script__', '__console__'):
+    main()       

files/druh_pozemku.csv

@@ -0,0 +1,12 @@
+KOD;NAZEV;ZEMEDELSKA_KULTURA;PLATNOST_OD;PLATNOST_DO;ZKRATKA;TYPPPD_KOD;STAVEBNI_PARCELA;POVINNA_OCHRANA_POZ;POVINNY_ZPUSOB_VYUZ
+2;orná půda;a;01.01.1993;;orná půda;;n;27;n
+3;chmelnice;a;01.01.1993;;chmelnice;302;n;27;n
+4;vinice;a;01.01.1993;;vinice;303;n;27;n
+5;zahrada;a;01.01.1993;;zahrada;304;n;27;n
+6;ovocný sad;a;01.01.1993;;ovoc. sad;305;n;27;n
+7;trvalý travní porost;a;01.01.1993;;travní p.;306;n;27;n
+8;trvalý travní porost;a;01.01.1993;01.09.2000;travní p.;307;n;27;n
+10;lesní pozemek;n;01.01.1993;;lesní poz;308;n;26;n
+11;vodní plocha;n;01.01.1993;;vodní pl.;;n;;a
+13;zastavěná plocha a nádvoří;n;01.01.1993;;zast. pl.;;a;;n
+14;ostatní plocha;n;01.01.1993;;ostat.pl.;;n;;a