python - Require help understanding Flask url_for() -

i testing login() route have trouble redirect. redirected main index page.

my authentication blueprint looks this:

from flask import blueprint, render_template, request, redirect, url_for  mod = blueprint('auth', __name__, url_prefix='/auth')   @mod.route('/login', methods=['get', 'post']) def login():     if request.method == 'post':         return redirect(url_for('general.index'))     return render_template('auth/login.html')  @mod.route('/logout', methods=['get', 'post']) def logout():     # delete session token     return render_template('auth/logout.html')  @mod.route('/tokeninfo') def token_info():     return render_template('auth/tokeninfo.html') 

additionally, general blueprint defined as:

from flask import blueprint, render_template  mod = blueprint('general', __name__)   @mod.route('/') @mod.route('/index') def index():     return render_template('general/index.html') 

however, every time submit form on /login route redirected localhost:5000/auth , receive 404 page not found error.

i have tried adjusting return redirect(url_for('general.index')) in following ways, none successful:

• return redirect(url_for(general.index))
• return redirect(url_for('general.index'))
• return redirect(url_for('../general.index'))

edit:

it seems submitting login form post on /auth, , not on /auth/login. appears on server log:

127.0.0.1 - - [07/apr/2017 15:06:59] "get /auth/login http/1.1" 200 - 404 not found: requested url not found on server.  if entered url manually please check spelling , try again. 127.0.0.1 - - [07/apr/2017 15:07:03] "post /auth http/1.1" 404 - 

what missing / not understanding? in advance

the issue template!

in login template, had:

<form action="/auth" method="post" class="form-horizontal"> 

however, since transitioning blueprint powered app, needed following change:

<form action="/auth/login" method="post" class="form-horizontal"> 

now redirect working expected.