def delete_all(cls):
try:
db_session.query(cls).delete()
db_session.commit()
except Exception as e:
current_app.logger.info(e)
db_session.rollback()
return
def save(self):
try:
db_session.add(self)
db_session.commit()
except Exception as e:
current_app.logger.error(e)
db_session.rollback()
return self
def get_by(cls, **kw):
try:
result = cls.query.filter_by(**kw).first()
db_session.commit()
return result
except Exception as e:
current_app.logger.info(e)
db_session.rollback()
return None
def get(cls, id):
try:
result = cls.query.get(id)
db_session.commit()
return result
except Exception as e:
current_app.logger.info(e)
db_session.rollback()
return None
def first(cls):
try:
result = db_session.query(cls).first()
db_session.commit()
return result
except Exception as e:
current_app.logger.info(e)
db_session.rollback()
return None
def last(cls):
try:
result = db_session.query(cls).order_by(
cls.created_at.desc()).first()
db_session.commit()
return result
except Exception as e:
current_app.logger.info(e)
db_session.rollback()
return None
def delete(self) -> bool:
try:
db_session.delete(self)
db_session.commit()
except Exception as e:
current_app.logger.error(e)
db_session.rollback()
return False
else:
return True
def create(cls, **kw):
r = cls(**kw)
try:
db_session.add(r)
db_session.commit()
except Exception as e:
current_app.logger.error(e)
db_session.rollback()
return None
else:
return r
def get_or_create(cls, **kw):
r = cls.get_by(**kw)
if not r:
r = cls(**kw)
try:
db_session.add(r)
db_session.commit()
except Exception as e:
current_app.logger.info(e)
db_session.rollback()
return r
def update(self, **kwargs):
'''
Updates the model's fields and returns the model instance if sucessful
'''
try:
db_session.query(
self.__class__).filter_by(id=self.id).update(kwargs)
db_session.commit()
except Exception as e:
current_app.logger.error(e)
db_session.rollback()
return None
else:
return self
