can't POST data with Flask app using SQLAlchemy + Marshmallow - flask

Question

I'd like to POST some data to a database on AWS RDS. I have a Flask application, and I am trying to commit a SQLAlchemy object to the db.
here is a sqlalchemy class with 3 fields, and the accompanying marshmallow schema class :
class Plant(db.Model):
id = db.Column(db.Integer, primary_key=True)
name = db.Column(db.String(100))
dur = db.Column(db.Integer)
def __init__(self, name, dur):
self.name = name
self.dur = dur
class PlantSchema(ma.SQLAlchemySchema):
class Meta:
model = Plant
Here is the a POST request in app.py, in order to add a plant model to my database :
plant_schema = PlantSchema()
#app.route('/plants', methods=['POST'])
def add_plant():
name = request.json.get('name', '')
dur = request.json.get('dur', '')
plant = Plant(name=name, dur=dur)
db.session.add(plant)
db.session.commit()
return plant_schema.jsonify(plant)
unfortunately, when i POST my request in Postman, i get the following
<title>400 Bad Request</title>
<h1>Bad Request</h1>
<p>Did not attempt to load JSON data because the request Content-Type was not 'application/json'.</p>
this is the JSON that i am giving to postman, for the POST request.
{
"name":"melon",
"dur":"1"
}
not sure where i went wrong, im not sure if the JSON is correctly structured, but i dont know the proper structure it should have, or where in the application the post is breaking down.

Answer 1

You need to specify in your request that you are sending a json.
If you send without Content-Type, your application will return that you need to specify the Content-Type to application/json:
You just need to add the content type header:
Code for the example:
from flask import Flask
from flask import request
app = Flask(__name__)
#app.post("/")
def teste():
a = request.json.get("teste", "")
return a, 200
if __name__ == "__main__":
app.run(debug=True)