How can we set restrictions on page in flask app?

 if we want to the user had to login to view the page.

we can use this decorator   @login_required to enforce only login user can access the page.

@app.route('/private')

@login_required

def private_page():

purchase_form = PurchaseItemForm()

if request.method == "POST":

purchased_item = request.form.get('purchased_item')

p_item_object = Item.query.filter_by(name=purchased_item).first()

if p_item_object:

if current_user.can_purchase(p_item_object):

p_item_object.buy(current_user)

flash(f"Congratulations! You purchased {p_item_object.name} for {p_item_object.price}$", category='success')

else:

flash(f"Unfortunately, you don't have enough money to purchase {p_item_object.name}!", category='danger')

return redirect(url_for('private_page'))

if request.method == "GET":

items = Item.query.filter_by(owner=None)

for item in items:

print(item.name)

return render_template('market.html', items=items, purchase_form=purchase_form)

How to get the name of the route the user try to navigate on canAcitvate method?

when we want to know what component the use try to access with AuthGuard enable, it is quit simple

we can put a console.log in the canActivate Method, to monitor the ActivateRouteSnapshot in Angular 9

console.log("the name of route: " + destination.routeConfig.component.name);

 

in Angular 6

you can access it from route.component.name

here is the sample code

import { Injectable } from "@angular/core";

import { CanActivate, Router, ActivatedRouteSnapshot,  

RouterStateSnapshot } from '@angular/router';

@Injectable()

export class longinGuard implements CanActivate{

    constructor(private router: Router){

    }

    canActivate(destination: ActivatedRouteSnapshot, state: RouterStateSnapshot){

        console.log("the name of route navigate to: " +

  destination.routeConfig.component.name);

  

    }

}