feat: allow to add new candidates

app/crud.py

@@ -254,6 +254,14 @@ def update_election(
             "You can't invite voters on a non-restricted election"
         )
 
+    # Create new candidates (those whose Id is None)
+    for candidate in election.candidates:
+        if candidate.id is None:
+            params = candidate.dict()
+            db_candidate = create_candidate(db, candidate, election_ref, True)
+            candidate.id = int(str(db_candidate.id))
+
+    # Check that candidates look fine
     candidate_ids = {c.id for c in election.candidates}
     db_candidate_ids = {c.id for c in db_election.candidates}
     if candidate_ids != db_candidate_ids:

app/schemas.py

@@ -34,7 +34,7 @@ class CandidateGet(CandidateBase):
 
 
 class CandidateUpdate(CandidateBase):
-    id: int
+    id: int | None = None
 
 
 class CandidateCreate(CandidateBase):
@@ -184,6 +184,8 @@ class ElectionCreate(ElectionBase):
 
     @validator("grades")
     def all_grades_have_unique_values_and_names(cls, grades: list[GradeBase]):
+        grades = [grade for grade in grades if grade.id is not None]
+
         values = [g.value for g in grades]
         if len(set(values)) != len(grades):
             raise ArgumentsSchemaError("At least two grades have the same value")