def add_equipment(): id = request.json['id'] type = request.json['type'] produce_name = request.json['produce_name'] weight = request.json['weight'] amort = request.json['amort'] new_equipment = Equipment() new_equipment.id = id new_equipment.type = type new_equipment.produce_name = produce_name new_equipment.weight = weight new_equipment.amort = amort db.session.add(new_equipment) # adding to DB elements db.session.commit() # have to write with session.add return str(new_equipment.__str__())