rename + added validation of answer to question

src/fiber_package/signup/answer/answer_open_questions.py

@@ -6,4 +6,4 @@ from fiber_package.signup.enums import FormElementCategory
 class AnswerOpenQuestions(AnswerBase):
     category: Literal[FormElementCategory.open_questions]
 
-    answers: list[str]
+    answer_list: list[str]

src/fiber_package/signup/element/form_base_question.py

@@ -2,3 +2,7 @@ from .form_element import FormElement
 
 class FormBaseQuestion(FormElement):
     required: bool
+
+    title: str | None = None
+    pretext: str | None = None
+    posttext: str | None = None

src/fiber_package/signup/element/form_open_questions.py

@@ -4,6 +4,8 @@ from pydantic import BaseModel
 from .form_base_question import FormBaseQuestion
 from fiber_package.signup.enums import FormElementCategory
 
+from fiber_package.signup.answer.answer_open_questions import AnswerOpenQuestions
+
 class OpenQuestion(BaseModel):
     question_en: str
     question_nl: str
@@ -19,9 +21,14 @@ class FormOpenQuestions(FormBaseQuestion):
 
     questions: list[OpenQuestion]
 
-    title: str | None = None
-    pretext: str | None = None
-    posttext: str | None = None
+    def validate_answer(self, answer: AnswerOpenQuestions) -> None:
+        if answer.question_name != self.name:
+            raise ValueError("Answer question name does not match.")
+        
+        answer_list = answer.answer_list
+        if len(answer_list) != len(self.questions):
+            raise ValueError("Length of answer question list does not match.")
+