Added script for alloting rooms to students.

institute/management/commands/allotrooms.py

@@ -0,0 +1,62 @@
+import os, csv, traceback
+from django.db.models import Q
+from django.core.exceptions import ValidationError
+from django.core.management.base import BaseCommand, CommandError
+from institute.models import Block, Student
+from django.conf import settings
+
+
+class Command(BaseCommand):
+    help = "Allot rooms to students given the Roll No. Usage: python manage.py allotrooms <filename>.csv"
+
+    def get_file_path(self, file_name):
+        return os.path.join(settings.BASE_DIR, "data", file_name)
+
+    def get_floor_from_letter(self, letter):
+        if letter == "G":
+            return "Ground"
+        elif letter == "F":
+            return "First"
+        elif letter == "S":
+            return "Second"
+        else:
+            raise ValidationError("Only Ground(G), First(F) and Second(S) floors accepted!")
+
+
+    def add_arguments(self, parser):
+        parser.add_argument("file_name", nargs="+", type=str)
+
+    def handle(self, *args, **options):
+        file_path = self.get_file_path(options["file_name"][0])
+        try:
+            with open(file_path) as csv_file:
+                csv_reader = csv.DictReader(csv_file, delimiter=",")
+                self.stdout.write(self.style.SUCCESS("Reading: {}".format(file_path)))
+
+                created, rejected = [0, 0]
+                for data in csv_reader:
+                    try:
+                        student = Student.objects.get(Q(regd_no = data["id"]) | Q(roll_no = data["id"]))
+                        roomdetail = student.roomdetail
+                        roomdetail.room_no = int(data["Room no"])
+                        roomdetail.floor = self.get_floor_from_letter(data["floor"])
+                        roomdetail.block = (Block.objects.filter(name__contains = data["block name"]) | Block.objects.filter(name__contains = data["block name"].capitalize())).first()
+                        roomdetail.full_clean()
+                        roomdetail.save()
+                        created += 1
+
+                    except Student.DoesNotExist:
+                        print("Invalid Student ID: {}".format(data["id"]))
+                        rejected += 1 
+                    except Exception as e:
+                        if data["id"]:
+                            print("Error while inserting student - {}: {}".format(data["id"], e.messages))
+                            # traceback.print_exc()
+                        else:
+                            pass
+                        rejected += 1 
+
+        except Exception as e:
+            raise CommandError("Error: {}".format(e))
+
+        self.stdout.write(self.style.SUCCESS('Successfully imported {} students. Rejected {} students.'.format(created, rejected)))