v2.5.1; handle error if no closed milestone exists for roadmap

api/blueprints/MilestoneAPI.py

@@ -55,6 +55,9 @@ def construct_blueprint(database):
     @milestone_api.route('/milestones/<int:roadmapID>/latest', methods=['GET'])
     def get_latest_milestone(roadmapID):
         milestone = database.get_latest_milestone(roadmapID)
+        if milestone is None:
+            return 'No closed milestones existing for roadmap with ID "{}"'.format(roadmapID), 400
+
         return jsonify(prepare_milestone(milestone))
 
     @milestone_api.route('/milestone/<int:milestoneID>', methods=['GET'])

api/version.json

 {
     "version": {
-        "name": "v2.5.0",
-        "code": 16,
-        "date": "03.10.19"
+        "name": "v2.5.1",
+        "code": 17,
+        "date": "18.04.20"
     }
 }
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