Add debug toolbar config and documentation

Dockerfile-django-dev

@@ -4,6 +4,7 @@ RUN pip install pip-tools
 
 COPY ./requirements.txt .
 RUN pip-sync requirements.txt
+RUN pip install django-debug-toolbar==3.5.0
 
 WORKDIR /usr/src/app
 

README.md

@@ -144,3 +144,14 @@ In addition to running pycodestyle, pydocstyle, and mypy, this will also check t
 
 Note that validating the API schema requires Node 16 (newer versions may work as well).
 You can install Node 16 with [NVM](https://github.com/nvm-sh/nvm?tab=readme-ov-file#installing-and-updating).
+
+# Profiling
+You can use django-debug-toolbar to profile API requests.
+
+1. Follow the [dev stack setup tutorial](https://github.com/eecs-autograder/autograder-full-stack/blob/master/docs/development_setup.md) for the [autograder-full-stack repo](https://github.com/eecs-autograder/autograder-full-stack).
+2. Populate the database with benchmark data. 
+Benchmark scripts should be added to autograder-server/benchmarks and should include:
+    - Instructions on how to run them on the development stack.
+    - Results from the last time they were run (and specifying what machine).
+3. Visit the API URL in your browser with the query parameter `debug=true` appended. 
+For example: `https://localhost:<port>/api/users/current/?debug=true`

autograder/settings/base.py

@@ -256,3 +256,8 @@
 DEFAULT_AUTO_FIELD = 'django.db.models.AutoField'
 
 from autograder.settings.celery_settings import *  # noqa
+
+
+# Indicates that the Django service is running as part of the web development stack
+# (specifically the web server rather than the graders or running linters).
+IS_DEV_SERVER = os.environ.get('IS_DEV_SERVER', 'false') == 'true'

autograder/settings/development.py

@@ -21,44 +21,36 @@
 
 EMAIL_BACKEND = 'django.core.mail.backends.console.EmailBackend'
 
-# !!! IMPORTANT !!!
-# As of 22 April, 2020, django-debug-toolbar 2.2 (required when using Django 3)
-# causes a memory leak, which in turn causes MemoryError in tests that create
-# subprocesses. If you need to profile something, install the library manually
-# and then uncomment the settings below to enable it. Also uncomment the
-# "__debug__" url pattern in urls.py.
-# Once you are finished profiling, UNINSTALL the library an RE-COMMENT
-# the settings.
-#
-# INSTALLED_APPS += [
-#     'debug_toolbar',
-# ]
-# def show_toolbar_callback(request):
-#     return DEBUG
-# DEBUG_TOOLBAR_CONFIG = {
-#     'SHOW_TOOLBAR_CALLBACK': show_toolbar_callback
-# }
-# DEBUG_TOOLBAR_PANELS = [
-#     'debug_toolbar.panels.versions.VersionsPanel',
-#     'debug_toolbar.panels.timer.TimerPanel',
-#     'debug_toolbar.panels.settings.SettingsPanel',
-#     'debug_toolbar.panels.headers.HeadersPanel',
-#     'debug_toolbar.panels.request.RequestPanel',
-#     'debug_toolbar.panels.sql.SQLPanel',
-#     'debug_toolbar.panels.profiling.ProfilingPanel',
-#     # 'debug_toolbar.panels.staticfiles.StaticFilesPanel',
-#     # 'debug_toolbar.panels.templates.TemplatesPanel',
-#     'debug_toolbar.panels.cache.CachePanel',
-#     'debug_toolbar.panels.signals.SignalsPanel',
-#     'debug_toolbar.panels.logging.LoggingPanel',
-#     'debug_toolbar.panels.redirects.RedirectsPanel',
-# ]
-# MIDDLEWARE += (
-#     'debug_toolbar.middleware.DebugToolbarMiddleware',
-#     'autograder.non_html_debug_toolbar_middleware.NonHtmlDebugToolbarMiddleware',
-# )
-#
-# /IMPORTANT
+if IS_DEV_SERVER:
+    INSTALLED_APPS += [
+        'debug_toolbar',
+    ]
+
+    def show_toolbar_callback(request):
+        return DEBUG
+
+    DEBUG_TOOLBAR_CONFIG = {
+        'SHOW_TOOLBAR_CALLBACK': show_toolbar_callback
+    }
+    DEBUG_TOOLBAR_PANELS = [
+        'debug_toolbar.panels.versions.VersionsPanel',
+        'debug_toolbar.panels.timer.TimerPanel',
+        'debug_toolbar.panels.settings.SettingsPanel',
+        'debug_toolbar.panels.headers.HeadersPanel',
+        'debug_toolbar.panels.request.RequestPanel',
+        'debug_toolbar.panels.sql.SQLPanel',
+        'debug_toolbar.panels.profiling.ProfilingPanel',
+        # 'debug_toolbar.panels.staticfiles.StaticFilesPanel',
+        # 'debug_toolbar.panels.templates.TemplatesPanel',
+        'debug_toolbar.panels.cache.CachePanel',
+        'debug_toolbar.panels.signals.SignalsPanel',
+        # 'debug_toolbar.panels.logging.LoggingPanel',
+        'debug_toolbar.panels.redirects.RedirectsPanel',
+    ]
+    MIDDLEWARE += (
+        'debug_toolbar.middleware.DebugToolbarMiddleware',
+        'autograder.non_html_debug_toolbar_middleware.NonHtmlDebugToolbarMiddleware',
+    )
 
 REST_FRAMEWORK.update({
     'TEST_REQUEST_DEFAULT_FORMAT': 'json'

autograder/urls.py

@@ -25,13 +25,12 @@
     url(r'^api/', include('autograder.mutant_hints.urls')),
 ]
 
-if settings.DEBUG:
+if settings.IS_DEV_SERVER:
     urlpatterns += [
         url(r'^static/(?P<path>.*)$', views.serve),
     ]
 
-    # See note in autograder/settings/development.py
-    # import debug_toolbar
-    # urlpatterns = [
-    #     url(r'^__debug__/', include(debug_toolbar.urls)),
-    # ] + urlpatterns
+    import debug_toolbar
+    urlpatterns = [
+        url(r'^__debug__/', include(debug_toolbar.urls)),
+    ] + urlpatterns

requirements-dev.txt

@@ -16,7 +16,7 @@ coreapi==2.3.3
     # via djangorestframework-stubs
 coreschema==0.0.4
     # via coreapi
-django==3.2.2
+django==3.2.25
     # via
     #   -c requirements.txt
     #   django-stubs

requirements.txt

@@ -20,7 +20,7 @@ celery==4.4.7
     # via -r requirements.in
 decorator==4.4.2
     # via ipython
-django==3.2.2
+django==3.2.25
     # via
     #   -r requirements.in
     #   django-redis