'str' object has no attribute 'user

I'm making a dbms project on a covid hospital system and I can't seem to figure out why i'm getting this error, here's my code:

from flask import Flask,redirect,render_template,request
from flask_sqlalchemy import SQLAlchemy  
from flask_login import UserMixin
from flask_login import login_required,logout_user,login_user,login_manager,LoginManager,current_user

#database connection
local_server=True
app=Flask(__name__)
app.secretkey="adarshacharya"

#unique access
login_manager=LoginManager()
login_manager.init_app(app)
login_manager=login_view='login'

app.config["SQLALCHEMY_DATABASE_URI"]='mysql://root:@localhost/covidata'
db=SQLAlchemy(app)

@login_manager.user_loader
def load_user(user_id):
    return patient_details.query.get(int(user_id))

class patient_details(db.Model):
    pid=db.Column(db.Integer, primary_key=True)
    Email=db.Column(db.String(50),unique=True)
    Password=db.Column(db.String(50))
    FirstName=db.Column(db.String(50))
    LastName=db.Column(db.String(50))
    Contact=db.Column(db.String(10),unique=True)
    Age=db.Column(db.Integer)

@app.route("/")
def home():
    return render_template("index.html")

@app.route("/patientregistration")
def PatientRegistration():
    return render_template('patientregistration.html')

@app.route("/patientlogin")
def PatientLogin():
    return render_template('patientlogin.html')

@app.route('/registration',methods=['POST','GET'])
def registration():
    if request.method=="POST":
        patientid=request.form.get('Pid')
        pemail=request.form.get('Pemail')
        ppassword=request.form.get('PPassword')
        pfirstname=request.form.get('PFirstName')
        plastname=request.form.get('PLastName')
        pcontact=request.form.get('PContact')
        page=request.form.get('PAge')
        print(patientid,pemail,ppassword,pfirstname,plastname,pcontact,page)
        return render_template("patientregistration.html")

app.run(debug=True)

And this is the error:

@login_manager.user_loader AttributeError: 'str' object has no attribute 'user_loader' `

I've tried all fixes i've come across but those don't seem to fix the problem :(, any help would be appreciated

CodePudding user response：

Your problem is probably at this line,

login_manager=login_view='login'

change it to,

login_manager.login_view='login'

CodePudding user response：

try passing "UserMixin" as an argument to the patient_details object

class patient_details(db.Model, UserMixin):
   pid = db.Column(db.Integer, primary_key=True)
   Email = db.Column(db.String(50),unique=True)
   Password = db.Column(db.String(50))
   FirstName = db.Column(db.String(50))
   LastName = db.Column(db.String(50))
   Contact = db.Column(db.String(10),unique=True)
   Age = db.Column(db.Integer)

Also try the solution given by Charles