77 lines
3.0 KiB
Python
77 lines
3.0 KiB
Python
import csv
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import os
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from django.core.management.base import BaseCommand
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from django.db import connection
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from inventory.models import CarTrim
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class Command(BaseCommand):
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help = "Add id_car_model column to CarTrim model and populate it using a CSV file."
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def handle(self, *args, **options):
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# Define the file path relative to the project directory
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base_dir = os.path.dirname(
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os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
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)
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file_path = os.path.join(base_dir, "data/mappings.csv")
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# Step 1: Add the new column if it does not exist
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with connection.cursor() as cursor:
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try:
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cursor.execute(
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"ALTER TABLE inventory_cartrim ADD COLUMN id_car_model INTEGER"
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)
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self.stdout.write(
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self.style.SUCCESS("Column 'id_car_model' added successfully.")
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)
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except Exception as e:
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self.stdout.write(
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self.style.WARNING(
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f"Column 'id_car_model' might already exist: {e}"
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)
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)
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# Step 2: Read and process the CSV file
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try:
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with open(file_path, mode="r", encoding="utf-8-sig") as csvfile:
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reader = csv.DictReader(csvfile)
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for row in reader:
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# Extract id_car_serie and id_car_model from the current row
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id_car_serie = row.get("id_car_serie")
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id_car_model = row.get("id_car_model")
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if not id_car_serie or not id_car_model:
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self.stdout.write(
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self.style.WARNING(f"Skipping row with missing data: {row}")
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)
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continue
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# Step 3: Update CarTrim rows based on the id_car_serie
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updated_count = CarTrim.objects.filter(
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id_car_serie=id_car_serie
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).update(id_car_model=id_car_model)
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# Output progress
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if updated_count > 0:
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self.stdout.write(
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self.style.SUCCESS(
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f"Updated {updated_count} rows for id_car_serie={id_car_serie} with id_car_model={id_car_model}."
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)
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)
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else:
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self.stdout.write(
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self.style.WARNING(
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f"No rows found for id_car_serie={id_car_serie}."
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)
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)
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self.stdout.write(
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self.style.SUCCESS("All rows have been processed successfully!")
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)
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except FileNotFoundError:
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self.stdout.write(self.style.ERROR(f"File not found: {file_path}"))
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except Exception as e:
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self.stdout.write(self.style.ERROR(f"An error occurred: {e}"))
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