Add django command to populate the database with shapefile data

backend/right_tree/api/management/commands/loadshapefiles.py

@@ -0,0 +1,44 @@
+from django.core.management.base import BaseCommand
+from django.contrib.gis.utils import LayerMapping
+
+from pathlib import Path
+
+import right_tree.api.data
+from right_tree.api.models import SoilLayer, EcologicalDistrictLayer
+
+# Auto-generated `LayerMapping` dictionary for SoilLayers model
+soillayer_mapping = {
+    'nzsc_class': 'nzsc_class',
+    'nzsc_group': 'nzsc_group',
+    'nzsc_order': {'code': 'nzsc_order'},
+    'shape_leng': 'SHAPE_Leng',
+    'geom': 'POLYGON',
+}
+
+# Auto-generated `LayerMapping` dictionary for ecologicaldistrictlayer model
+ecologicaldistrictlayer_mapping = {
+    'ecological': 'ECOLOGICAL',
+    'ecologic_1': 'ECOLOGIC_1',
+    'ecologic_2': {'name': 'ECOLOGIC_2'},
+    'shape_leng': 'SHAPE_Leng',
+    'shape_area': 'SHAPE_Area',
+    'geom': 'POLYGON',
+}
+
+# Shapefiles
+soillayer_shp = Path(right_tree.api.data.__file__).resolve().parent / 'resources' / 'fundamental_soil_layers' / 'fundamental-soil-layers-new-zealand-soil-classification.shp'
+ecologicaldistrictlayer_shp = Path(right_tree.api.data.__file__).resolve().parent / 'resources' / 'ecological_districts' / 'DOC_EcologicalDistricts_2021_08_02.shp'
+
+class Command(BaseCommand):
+    help = 'Ingests the shapefile data for ecological regions and soil layers.'
+
+    def handle(self, *args, **options):
+        self.stdout.write('Loading soil layers...')
+        soil_lm = LayerMapping(SoilLayer, soillayer_shp, soillayer_mapping, transform=False)
+        soil_lm.save(strict=True)
+        self.stdout.write(self.style.SUCCESS('Soil layers loaded succesfully.'))
+
+        self.stdout.write('Loading ecological district layers...')
+        ecologicaldistrictlayer_lm = LayerMapping(EcologicalDistrictLayer, ecologicaldistrictlayer_shp, ecologicaldistrictlayer_mapping, transform=False)
+        ecologicaldistrictlayer_lm.save(strict=True)
+        self.stdout.write(self.style.SUCCESS('Ecological district layers loaded succesfully.'))