Align backend serialized criticality display with frontend

backend/ebios_rm/models.py

@@ -1,3 +1,4 @@
+import re
 from django.core.validators import MaxValueValidator, MinValueValidator
 from django.db import models
 from django.utils.translation import gettext_lazy as _
@@ -362,6 +363,20 @@ def residual_criticality(self):
             self.residual_trust,
         )
 
+    def get_current_criticality_display(self) -> str:
+        return (
+            f"{self.current_criticality:.2f}".rstrip("0").rstrip(".")
+            if "." in f"{self.current_criticality:.2f}"
+            else f"{self.current_criticality:.2f}"
+        )
+
+    def get_residual_criticality_display(self) -> str:
+        return (
+            f"{self.residual_criticality:.2f}".rstrip("0").rstrip(".")
+            if "." in f"{self.residual_criticality:.2f}"
+            else f"{self.residual_criticality:.2f}"
+        )
+
 
 class AttackPath(NameDescriptionMixin, FolderMixin):
     ebios_rm_study = models.ForeignKey(

backend/ebios_rm/serializers.py

@@ -104,11 +104,11 @@ class Meta:
 
 
 class StakeholderWriteSerializer(BaseModelSerializer):
-    current_criticality = serializers.DecimalField(
-        max_digits=5, decimal_places=2, read_only=True
+    current_criticality = serializers.CharField(
+        source="get_current_criticality_display"
     )
-    residual_criticality = serializers.DecimalField(
-        max_digits=5, decimal_places=2, read_only=True
+    residual_criticality = serializers.CharField(
+        source="get_residual_criticality_display"
     )
 
     class Meta:
@@ -124,8 +124,12 @@ class StakeholderReadSerializer(BaseModelSerializer):
     applied_controls = FieldsRelatedField(many=True)
 
     category = serializers.CharField(source="get_category_display")
-    current_criticality = serializers.DecimalField(max_digits=5, decimal_places=2)
-    residual_criticality = serializers.DecimalField(max_digits=5, decimal_places=2)
+    current_criticality = serializers.CharField(
+        source="get_current_criticality_display"
+    )
+    residual_criticality = serializers.CharField(
+        source="get_residual_criticality_display"
+    )
 
     class Meta:
         model = Stakeholder