better errors && some fixes

models/answer.py

@@ -37,11 +37,7 @@ class SelectorValue(BaseValue):
     values: set[int]
 
     def validate(self, question: form.SelectorQuestion) -> None:
-        min_values = (
-            max(question.min_values, 1)
-            if question.min_values
-            else 1
-        )
+        min_values = max(question.min_values, 1) if question.min_values else 1
         max_values = (
             min(question.max_values, question.options)
             if question.max_values
@@ -72,9 +68,8 @@ class AnswerData(BaseValue):
             uuids.add(value.question_id)
 
         if len(v) != len(uuids):
-            raise ValueError(
-                AnswerError.DUPLICATE_QUESTIONS
-            )
+            raise ValueError(AnswerError.DUPLICATE_QUESTIONS)
+
 
 class Answer(BaseModel):
     id: int
@@ -83,11 +78,7 @@ class Answer(BaseModel):
 
     @field_validator("data")
     @classmethod
-    def answer_validator(
-        cls,
-        v,
-        info
-    ):
+    def answer_validator(cls, v, info):
         uuids = v.question_uuids
         questions = info.data["form"].data
         for question in questions:
@@ -98,5 +89,5 @@ class Answer(BaseModel):
             del uuids[question.id]
 
         if len(uuids) > 0:
-            raise ValueError("Some questions are not known")
+            raise ValueError(AnswerError.INCORRECT_IDS)
         return v

models/form.py

@@ -1,12 +1,21 @@
-from enum import IntEnum, auto
+from enum import IntEnum, Enum
 from typing import TypeAlias
 from uuid import UUID, uuid4
 
-from pydantic import Field, field_validator
+from pydantic import Field, field_validator, field_serializer
 
 from models import BaseModel
 
 
+class FormError(Enum):
+    MIN_LENGTH_ERR = "min_length must be greater than or equal to 0."
+    MAX_LENGTH_ERR = "max_length must be greater than 0."
+    MAX_LENGTH_LESS_THAN_MIN_LENGTH = "max_length cannot be less than min_length."
+    MIN_VALUES_ERR = "min_values must be greater than or equal to 1."
+    MAX_VALUES_ERR = "max_values cannot be less than min_length or greater than the number of options."
+    SIMMILAR_ID_ERR = "All questions must have different id's"
+
+
 class QuestionType(IntEnum):
     text = 1
     selector = 2
@@ -19,6 +28,10 @@ class BaseQuestion(BaseModel):
     description: str | None = Field(None, min_length=1)
     required: bool = True
 
+    @field_serializer("id")
+    def serialize_id(self, id: UUID):
+        return str(id)
+
 
 class Option(BaseModel):
     label: str
@@ -33,7 +46,7 @@ class TextQuestion(BaseQuestion):
     @classmethod
     def validate_min_length(cls, v, info):
         if v is not None and v < 0:
-            raise ValueError("min_length must be greater than or equal to 0")
+            raise ValueError(FormError.MIN_LENGTH_ERR)
         return v
 
     @field_validator("max_length")
@@ -42,9 +55,9 @@ class TextQuestion(BaseQuestion):
         min_length = info.data.get("min_length")
         if v is not None:
             if v <= 0:
-                raise ValueError("max_length must be greater than 0")
+                raise ValueError(FormError.MAX_LENGTH_TOO_SMALL)
             if min_length is not None and v < min_length:
-                raise ValueError("max_length cannot be less than min_length")
+                raise ValueError(FormError.MAX_LENGTH_LESS_THAN_MIN_LENGTH)
         return v
 
 
@@ -58,8 +71,9 @@ class SelectorQuestion(BaseQuestion):
     @classmethod
     def validate_min_values(cls, v, info):
         options = info.data.get("options")
+        options = [] if not options else options
         if v is not None and (v < 1 or v > len(options)):
-            raise ValueError("min_values must be greater than or equal to 1")
+            raise ValueError(FormError.MIN_VALUES_ERR)
         return v
 
     @field_validator("max_values")
@@ -68,9 +82,7 @@ class SelectorQuestion(BaseQuestion):
         min_values = info.data.get("min_values")
         options = info.data.get("options")
         if v is not None and (v > len(options) or min_values > v):
-            raise ValueError(
-                "max_values cannot be less than min_length or greater than the number of options"
-            )
+            raise ValueError(FormError.MAX_VALUES_ERR)
         return v
 
 
@@ -84,21 +96,13 @@ class FormData(BaseModel):
 
     @field_validator("questions")
     @classmethod
-    def validate_questions(
-        cls,
-        v,
-        info
-    ):
-        questions = info.data.get("questions")
-        
+    def validate_questions(cls, v, info):
         uuids = set()
-        for question in questions:
-            uuids.add(question.question_id)
+        for question in v:
+            uuids.add(question.id)
 
-        if len(questions) != len(uuids):
-            raise ValueError(
-                "All questions must have different id's"
-            )
+        if len(v) != len(uuids):
+            raise ValueError(FormError.SIMMILAR_ID_ERR)
 
         return v
 

routes/form.py

@@ -29,9 +29,7 @@ async def create_form(user: User, form_data: FormData) -> CreateForm:
 @router.delete("/delete")
 async def delete_form(user: User, id: int):
     async with database.sessions.begin() as session:
-        stmt = select(database.Form).where(
-            database.Form.id == id
-        )
+        stmt = select(database.Form).where(database.Form.id == id)
         db_request = await session.execute(stmt)
         form = db_request.scalar_one_or_none()