Replace Black and isort with Ruff for code formatting and linting

- Update pre-commit configuration to use Ruff instead of Black/isort
- Add Ruff as development dependency in pyproject.toml
- Configure Ruff with Django-aware import sorting and formatting rules
- Apply Ruff formatting across entire codebase:
  - Fix import ordering and grouping
  - Remove unused imports and variables
  - Fix string formatting (remove f-string prefixes where unnecessary)
  - Improve code style consistency
  - Fix minor linting issues (unused variables, comparison style)
- Update task completion status in migration spec
- Maintain existing line length and formatting preferences

This migration consolidates two tools (Black + isort) into one (Ruff) while
maintaining code quality standards and improving development workflow efficiency.

Author: karbassi

.kiro/specs/black-to-ruff-migration/tasks.md

@@ -10,7 +10,7 @@
   - Add Ruff as a development dependency in the "# Development & Debugging" section alongside django-debug-toolbar
   - _Requirements: 1.1, 1.2, 1.3, 1.4, 1.5, 4.1, 4.2, 4.3, 4.4_
 
-- [ ] 2. Update pre-commit configuration
+- [x] 2. Update pre-commit configuration
 
   - Replace Black hook (psf/black) with Ruff formatter hook (charliermarsh/ruff-pre-commit)
   - Replace isort hook (pycqa/isort) with Ruff import sorting hook using --select I flag

.pre-commit-config.yaml

@@ -1,13 +1,13 @@
 default_language_version:
   python: python3.11
 
-# Ignore all 'migration' folders and .vscode folder
-exclude: '^(\.vscode\/?)|(.*\/migrations\/.*)$'
+# Ignore migration folders
+exclude: '.*\/migrations\/.*'
 
 repos:
   # pre-commit hooks
   - repo: https://github.com/pre-commit/pre-commit-hooks
-    rev: v3.2.0
+    rev: v5.0.0
     hooks:
       - id: no-commit-to-branch
         args: [--branch, main]
@@ -22,15 +22,12 @@ repos:
       - id: mixed-line-ending
         args: [--fix=lf]
 
-  # isort
-  - repo: https://github.com/pycqa/isort
-    rev: 5.12.0
+  # ruff
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.12.5
     hooks:
-      - id: isort
-
-  # black
-  - repo: https://github.com/psf/black
-    rev: 23.3.0
-    hooks:
-      - id: black
-        args: [--preview]
+      # Run the linter.
+      - id: ruff-check
+        args: [--fix]
+      # Run the formatter.
+      - id: ruff-format

accounts/views.py

@@ -1,19 +1,18 @@
-from django.conf import settings
+from allauth.account.views import (
+    LoginView as AllAuthLoginView,
+    SignupView as AllAuthSignupView,
+)
 from django.contrib import messages
 from django.contrib.auth.decorators import login_required
 from django.shortcuts import (
     get_object_or_404,
     redirect,
     render,
 )
+from django.urls import reverse
 from django.utils import timezone
 from django.utils.decorators import method_decorator
 from django.views.generic import TemplateView
-
-from allauth.account.views import (
-    LoginView as AllAuthLoginView,
-    SignupView as AllAuthSignupView,
-)
 from meta.views import MetadataMixin
 
 from coderdojochi.forms import (

coderdojochi/admin.py

@@ -11,7 +11,6 @@
 from django.urls import reverse
 from django.utils import timezone
 from django.utils.html import format_html
-
 from import_export import resources
 from import_export.admin import (
     ImportExportActionModelAdmin,

coderdojochi/cron.py

@@ -1,9 +1,8 @@
 from datetime import timedelta
 
+import arrow
 from django.conf import settings
 from django.utils import timezone
-
-import arrow
 from django_cron import (
     CronJobBase,
     Schedule,

coderdojochi/custom_storages.py

@@ -1,5 +1,4 @@
 from django.conf import settings
-
 from storages.backends.s3boto import S3BotoStorage
 
 

coderdojochi/forms.py

@@ -1,5 +1,7 @@
 import re
 
+import html5.forms.widgets as html5_widgets
+from dateutil.relativedelta import relativedelta
 from django import forms
 from django.contrib.auth import get_user_model
 from django.core.files.images import get_image_dimensions
@@ -17,11 +19,8 @@
 from django.utils.html import format_html
 from django.utils.safestring import mark_safe
 from django.utils.text import format_lazy
-
-import html5.forms.widgets as html5_widgets
 from django_recaptcha.fields import ReCaptchaField
 from django_recaptcha.widgets import ReCaptchaV3
-from dateutil.relativedelta import relativedelta
 
 from coderdojochi.models import (
     CDCUser,

coderdojochi/models/mentor.py

@@ -2,13 +2,11 @@
 
 from django.db import models
 from django.urls import reverse
-
 from stdimage.models import StdImageField
 
 from ..notifications import (
     NewMentorBgCheckNotification,
     NewMentorNotification,
-    NewMentorOrderNotification,
 )
 from .common import CommonInfo
 from .race_ethnicity import RaceEthnicity
@@ -143,7 +141,7 @@ def get_absolute_url(self):
         )
 
     def get_avatar(self):
-        if self.avatar and self.avatar_approved == True:
+        if self.avatar and self.avatar_approved:
             return {
                 "url": f"{self.avatar.url}",
                 "thumbnail": {

coderdojochi/models/mentor_order.py

@@ -1,5 +1,3 @@
-import os
-
 from django.db import models
 
 from ..notifications import NewMentorOrderNotification

coderdojochi/models/session.py

@@ -7,7 +7,6 @@
 from django.db import models
 from django.urls.base import reverse
 from django.utils import formats
-from django.utils.functional import cached_property
 
 from .common import CommonInfo