I am trying to insert a json file into postgress db using flask/sqlalchemy however I'm running into
TypeError: 'farmers' is an invalid keyword argument for Farmer
This is my upload script:
import os
import flask
from flask_sqlalchemy import SQLAlchemy
from flask import Flask, jsonify, send_from_directory
from sqlalchemy.dialects.postgresql import JSON
APP = Flask(__name__)
APP.config['SQLALCHEMY_DATABASE_URI'] = 'postgresql://postgres:admin@localhost:5432/flaskwebapp'
db = SQLAlchemy(APP)
class Farmers(db.Model):
Farmers = db.Column(db.Integer, primary_key=True)
W = db.Column(db.Integer)
Z = db.Column(db.Integer)
J1_I = db.Column(db.Integer)
def insert_data():
f1 = Farmers(farmers={"farmers":[{"W":1000000,"Z":22758,"J1_I":0.66},{"W":3500000,"Z":21374,"J1_I":2.69},{"W":2500000,"Z":14321,"J1_I":0.76},{"W":2500000,"Z":14321,"J1_I":0.76}]})
db.session.add(f1)
db.session.commit()
print('Data inserted to DB!')
insert_data()
This is the json file in question, however i dont think this is an issue as i'm able to read it in cmd:
{
"farmers":[ {
"W":1000000,
"Z":22758,
"J1_I":0.66
},
{
"W":3500000,
"Z":21374,
"J1_I":2.69
},
{
"W":2500000,
"Z":14321,
"J1_I":0.76
},
{
"W":2500000,
"Z":14321,
"J1_I":0.76
}]}
Any ideas why i'm not able to upload the data?
CodePudding user response:
The model constructor won't accept a list, you need to pass each dictionary individually:
farmer_data = {"farmers":[{"W":1000000,"Z":22758,"J1_I":0.66},{"W":3500000,"Z":21374,"J1_I":2.69},{"W":2500000,"Z":14321,"J1_I":0.76},{"W":2500000,"Z":14321,"J1_I":0.76}]}
farmers = [Farmer(**data) for data in farmer_data["farmers"]]
db.session.add_all(farmers)
db.session.commit()