Flask SQLAlchemy does not create all the columns of my model - flask

Question

I am using flask and flask SQLAlchemy to create my sqllite database that has one table with several columns. I have created my model but once I run the app it only creates the first 03 columns ?!!!
...
db = SQLAlchemy()
def setup_db(app):
db.app = app
db.init_app(app)
def db_drop_and_create_all():
db.drop_all()
db.create_all()
...
#dataclass
class ChurnModel(inheritedModels):
id = int
customerID = String
gender = String
SeniorCitizen: int
Partner: String
...
__tablename__ = 'churn'
id = Column(Integer().with_variant(Integer, "sqlite"), primary_key=True)
customerID = Column(String(255), nullable=False)
gender = Column(String(255))
SeniorCitizen: Column(Integer())
Partner: Column(String(255))
...
def get_churn(self):
return {
"id": self.id,
"customerID": self.customerID,
"gender": self.gender,
"SeniorCitizen": self.SeniorCitizen,
"Partner": self.Partner,
...
}
...
This is what I have found in the database.db file surrounded by a lot of nulls:
TE TABLE churn (
id INTEGER NOT NULL,
"customerID" VARCHAR(255) NOT NULL,
gender VARCHAR(255),
PRIMARY KEY (id)
)
Any explanation?!

Answer 1

After looking at the code, I think this is an expected behaviour since the only columns you defined are id, customerID, and gender.
Maybe you just got confused on how to use type hints, or you didn't pay attention to that, that's all.
Try this instead :
#dataclass
class ChurnModel(inheritedModels):
id: int
customerID: str
gender: str
SeniorCitizen: int
Partner: str
...
__tablename__ = 'churn'
id = Column(Integer().with_variant(Integer, "sqlite"), primary_key=True)
customerID = Column(String(255), nullable=False)
gender = Column(String(255))
SeniorCitizen= Column(Integer())
Partner= Column(String(255))
...