Upgrade to Flask v3

CHANGELOG.md

@@ -4,6 +4,12 @@ All notable changes to this project will be documented in this file.
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
+## [8.0.1]
+
+### Fixed
+- Upgrade from `flask==2.2.5` to `Flask==3.0.3`. Fixes a bug in which Dependabot was not tracking Flask upgrades because we specified the dependency name as lowercase.
+- Specify our custom JSON encoder by subclassing `flask.json.provider.JSONProvider`. See <https://github.com/pallets/flask/pull/4692>
+
 ## [8.0.0]
 
 ### Added

apps/api/src/hyp3_api/routes.py

@@ -6,6 +6,7 @@
 
 import yaml
 from flask import abort, g, jsonify, make_response, redirect, render_template, request
+from flask.json.provider import JSONProvider
 from flask_cors import CORS
 from openapi_core import OpenAPI
 from openapi_core.contrib.flask.decorators import FlaskOpenAPIViewDecorator
@@ -87,13 +88,24 @@ def default(self, o):
 
         if isinstance(o, datetime.date):
             return o.isoformat()
+
         if isinstance(o, Decimal):
             if o == int(o):
                 return int(o)
             return float(o)
+
+        # Raises a TypeError
         json.JSONEncoder.default(self, o)
 
 
+class CustomJSONProvider(JSONProvider):
+    def dumps(self, o):
+        return json.dumps(o, cls=CustomEncoder)
+
+    def loads(self, s):
+        return json.loads(s)
+
+
 class ErrorHandler(FlaskOpenAPIErrorsHandler):
     def __init__(self):
         super().__init__()
@@ -104,7 +116,7 @@ def __call__(self, errors):
         return handlers.problem_format(error['status'], error['title'])
 
 
-app.json_encoder = CustomEncoder
+app.json = CustomJSONProvider(app)
 
 openapi = FlaskOpenAPIViewDecorator(
     api_spec,

requirements-apps-api.txt

@@ -1,4 +1,5 @@
-flask==2.2.5
+# TODO: verify that dependabot bumps to Flask 3.0.3 on Monday
+Flask==3.0.2
 Flask-Cors==5.0.0
 jsonschema==4.23.0
 openapi-core==0.19.4

tests/test_api/test_patch_user.py

@@ -18,7 +18,7 @@ def test_patch_new_user(client, tables):
     assert response.json == {
         'user_id': 'foo',
         'application_status': APPLICATION_PENDING,
-        'remaining_credits': Decimal(0),
+        'remaining_credits': 0,
         'job_names': [],
         'use_case': 'I want data.',
     }
@@ -45,7 +45,7 @@ def test_patch_pending_user(client, tables):
     assert response.status_code == HTTPStatus.OK
     assert response.json == {
         'user_id': 'foo',
-        'remaining_credits': Decimal(0),
+        'remaining_credits': 0,
         'application_status': APPLICATION_PENDING,
         'use_case': 'New use case.',
         'job_names': [],
@@ -92,7 +92,7 @@ def test_patch_user_access_code(client, tables):
     assert response.json == {
         'user_id': 'foo',
         'application_status': APPLICATION_APPROVED,
-        'remaining_credits': Decimal(25),
+        'remaining_credits': 25,
         'job_names': [],
         'use_case': 'I want data.',
         'access_code': '123',