how select column in flask sqlalchemy - mysql

Question

How can i select a name column from another table instead of id ,
example :
class Attendance(db.Model):
__tablename__ = 'zk_attendance'
id = db.Column(db.Integer,primary_key=True)
uid = db.Column(db.Integer,db.ForeignKey('zk_users.uid'))
date = db.Column(db.Date)
time = db.Column(db.Time)
device = db.Column(db.Integer,db.ForeignKey('devices.id'))
user = db.relationship('Users',backref=db.backref('user', lazy='dynamic'))
class Users(db.Model):
__tablename__ = 'zk_users'
uid = db.Column(db.Integer,primary_key=True)
name = db.Column(db.String)
And if i want to select all attendance :
#app.route('/api/attendance/<string:date_from>/<string:date_to>',methods=['GET'])
def get_attend_date_date(date_from,date_to):
data = db.session.query(Attendance).filter(Attendance.date.between(date_from,date_to)).order_by(Attendance.date,Attendance.time)
attendance_schema = AttendanceSchema(many=True)
data = attendance_schema.dump(data).data
return jsonify({'attendance':data})
OUTPUT
{
"attendance": [
{
"Device": 4,
"date": "2016-01-18",
"id": 18805,
"time": "00:49:00",
"user": 30025
},
{
"Device": 4,
"date": "2016-01-18",
"id": 18902,
"time": "00:49:00",
"user": 30045
},
BUT
am getting the user uid , i want to return the user.name

Answer 1

Am using flask_marshmallow to serialize the data before send it as josn , to be able send the user name , i have to nest the name from the users schema as the following :
class UsersSchema(ma.Schema):
name = fields.String(dump_only=True)
class AttendanceSchema(ma.Schema):
date = fields.Date(dump_only=True)
user = fields.Nested(UsersSchema)