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+--- Thread: Fetching data from multiple tables in a single request. (/thread-31910.html)
Fetching data from multiple tables in a single request. - swaroop - Jan-09-2021
I am unable to get all the data from multiple tables in a single request.
Here this is my code.
class maindevotee(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(225))
phonenumber = db.Column(db.String(225))
gothram = db.Column(db.String(225))
date = db.Column(db.String(50))
address = db.Column(db.String(250))
def json(self):
return {'id': self.id, 'name':self.name, 'phonenumber': self.phonenumber, 'gothram': self.gothram,
'date': self.date, 'address': self.address}
class relatives(db.Model):
id = db.Column(db.Integer, primary_key=True)
main_id = db.Column(db.Integer, db.ForeignKey('maindevotee.id'), nullable=False)
name = db.Column(db.String(225))
star = db.Column(db.String(225))
gender = db.Column(db.String(45))
relation = db.Column(db.String(45))
def json(self):
return {'main_id': self.main_id, 'name': self.name, 'star':self.star,
'gender': self.gender, 'relation': self.relation}
class services(db.Model):
id = db.Column(db.Integer, primary_key=True)
main_id = db.Column(db.Integer, db.ForeignKey('maindevotee.id'), nullable=False)
pooja = db.Column(db.String(225))
god = db.Column(db.String(225))
price = db.Column(db.Float)
donation = db.Column(db.String(225))
booking_fromdate = db.Column(db.String(50))
booking_todate = db.Column(db.String(50))
prasadam = db.Column(db.String(225))
def json(self):
return {'main_id': self.main_id, 'pooja': self.pooja, 'god': self.god,
'price': self.price, 'donation': self.donation, 'booking_fromdate': self.booking_fromdate,
'booking_todate': self.booking_todate, 'prasadam': self.prasadam}These are all my tables in a database.and how to fetch all my data from multiple tables.
can i use foreign key to fetch data from multiple tables in a database.
Here this is what i am use this code to fetch data from multiple tables.
data = db.session.query(maindevotee, relatives, services)\
.filter(
(maindevotee.phonenumber == '3251469870')
& (maindevotee.id == relatives.main_id)
& (maindevotee.id == services.main_id)
).first()
def get_data():
return [data.json(get) for get in data.query.all()]
@app.route('/getdata',methods=['GET'])
def getdata():
return jsonify({'Devotee list': data.get_data()})If i run this code it will raise an errorError:AttributeError: 'result' object has no attribute 'get_data'