My python code:
import os
import webapp2
import jinja2
from google.appengine.ext import db
template_dir = os.path.join(os.path.dirname(__file__), 'templates')
jinja_env = jinja2.Environment(loader = jinja2.FileSystemLoader(template_dir), autoescape=True)
class Handler(webapp2.RequestHandler):
def write(self, *a, **kw):
self.response.out.write(*a, **kw)
def render_str(self, template, **params):
t = jinja_env.get_template(template)
return t.render(params)
def render(self, template, **kw):
self.write(self.render_str(template, **kw))
class MainPage(Handler):
#def render_front(self, title="", art="", error=""):
#self.render("front.html", title=title, art=art, error = error)
def get(self):
self.render("front.html")
def post(self):
title = self.request.get("title")
art = self.request.get("art")
if (title and art):
self.write("Thanks!")
#else ：
#self.write("Ooops")
#error="we need both a title and some artwork!"
#self.render("front.html", error=error)
application = webapp2.WSGIApplication([('/',MainPage)],debug=True)
My HTML Code:
<!DOCTYPE html>
<html>
<head>
<title>/ascii/</title>
</head>
<body>
<h1>/ascii/</h1>
<form method="post">
<label>
<div>title</div>
<input type="text" name="title" value= "{{ title }}">
</label>
<label>
<div>art</div>
<textarea name="art">{{ art }}</textarea>
</label>
<div class="error">{{ error }}</div>
<input type="submit">
</form>
</body>
</html>
I'm following an online class:
(start from the Form Handling)
Problem: (1) The function
#def render_front(self, title="", art="", error=""):
#self.render("front.html", title=title, art=art, error = error)
Has problems. If I don't comment it out, the page will have 500 error.
(2)
if (title and art):
self.write("Thanks!")
#else ：
#self.write("Ooops")
if I don't comment the else part out, the page will have 500 error also!
Please help! I don't know what's wrong! I guess, maybe it's because I didn't have Jinja2 in my python. But I have run ez_setup.py Jinja2 and it said Jinja2 has installed!
I also tried, in the html file, change value="{{title}}" to value={{title}}, but still doesn't work.
Thanks!!
