Inserting JSON into postgresql from Flask-Sql Alchemy - postgresql

Question

I want to insert JSON type of data in PostgreSQL Database from flask
eg: {"a":[1,2,3] , "b":[1,2,3]}
One example for such data is Phone.no and Childrens, One person can have multiple ph.no and Childrens
In flask View
#app.route('/add', methods=['POST'])
def addRex():
Name = request.form[‘name’]
data = request.get_json(force=False, silent=False, cache=True)
p = Projects(name=name,data = data)
db.session.add(p)
db.session.commit()
In HTTP post method
def addData():
name = input ('Enter Name :')
data = input('Enter Data :')
headers = {'Content-type': 'application/json', 'Accept': 'text/plain'}
r = requests.post(localhost:5000/add,
data ={'name':name}, json={'data':data})
if (r.status_code == 200):print(' Added Successfully!!') else:print('Already exists!')
How can I insert such kind of data from flask into postgresql.
if Anyone can help me with my problem.
Thanks in advance

Answer 1

From sqlalchemy dialect, you can select JSON for Postgres. Here is an example,
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy.dialects.postgresql import JSON
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'postgres://username:password#localhost:5432/db'
app.config['SQLALCHEMY_TRACK_MODIFICATIONS'] = True
db = SQLAlchemy(app)
class Person(db.Model):
person_name = db.Column(db.Text, primary_key=True)
details = db.Column(JSON)
# db.create_all() ==> for creating the db
per_1 = Person(person_name='Batman', details={"phone_no": [5, 6, 7, 8, 9], "children": {"son": [
"Dick Grayson", "Jason Todd", "Damian Wayne", "Tim Drake"], "daughter": ['Helena Wayne']}})
db.session.add(per_1)
db.session.commit()