I wrote a very basic CRUD app for Google App Engine in Python. It's a basic sample on how to add, edit, delete, and list a single entity in GAE. I didn't see anything like this on the web when I was learning GAE. I hope this helps you.
You need python 2.7 installed and Google App Engine installed to get up and running. I ran into one issue on Windows where nothing worked until I specified the version of python in GAE. I didn't have this issue on Mac OS X.
basiccrud.py
You need python 2.7 installed and Google App Engine installed to get up and running. I ran into one issue on Windows where nothing worked until I specified the version of python in GAE. I didn't have this issue on Mac OS X.
basiccrud.py
import webapp2
import cgi
import datetime
import urllib
from google.appengine.ext import db
from google.appengine.api import users
#blog###################################################
class BlogPost(db.Model):
title = db.StringProperty()
content = db.StringProperty()
date = db.DateTimeProperty(auto_now_add=True)
def BlogPostKey():
return db.Key.from_path('Blog','default_blog')
def BlogById(id):
return BlogPost.get_by_id(id,parent=BlogPostKey())
#PAGES#################################################
class MainPage(webapp2.RequestHandler):
def get(self):
self.response.write(
'<html>'
'<body>'
'<a href="/AddPost">AddPost</a>')
BlogPosts = db.GqlQuery("select * from BlogPost order by date desc limit 10")
self.response.write('<ul>')
for post in BlogPosts:
self.response.write('<li>{title} at {date} key: {key}<a href="/EditPost?id={key}">Edit</a></li>'
.format(title=post.title,date=post.date,key=post.key().id()))
self.response.write('</ul>')
self.response.write('</body></html>')
class AddPost(webapp2.RequestHandler):
def get(self):
self.response.write(
'<html>'
'<body>'
'<form action="/AddPost" method="POST">'
'TITLE:<input type=text name=title value=""/>'
'<br>CONTENT:<input type=text name=content value=""/>'
'<br><input type=submit text="submit"/>'
'</form>'
'</body>'
'</html>')
def post(self):
title = self.request.get('title')
content = self.request.get('content')
newpost = BlogPost(parent=BlogPostKey())
newpost.title = title
newpost.content = content
newpost.put()
self.redirect('/')
class EditPost(webapp2.RequestHandler):
def get(self):
id = int(self.request.get('id'))
newpost = BlogById(id)
self.response.write(
'<html>'
'<body>'
'<form action="/EditPost" method="POST">'
'<input type="hidden" value="{id}" name="id">'
'TITLE:<input type=text name=title value="{title}"/>'
'<br>CONTENT:<input type=text name=content value="{content}"/>'
'<br><input type=submit value="Save"/>'
'</form>'
'<form action="/DeletePost" method="POST">'
'<input type="hidden" value="{id}" name="id">'
'<br><input type=submit value="delete"/>'
'</form>'
'</body>'
'</html>'
.format(title=newpost.title,content=newpost.content,id=newpost.key().id()))
def post(self):
title = self.request.get('title')
content = self.request.get('content')
id = int(self.request.get('id'))
newpost = BlogById(id)
newpost.title = title
newpost.content = content
newpost.put()
self.redirect('/')
class DeletePost(webapp2.RequestHandler):
def post(self):
id = int(self.request.get('id'))
newpost = BlogById(id)
newpost.delete()
self.redirect('/')
app = webapp2.WSGIApplication([('/', MainPage),
('/AddPost',AddPost),
('/EditPost',EditPost),
('/DeletePost',DeletePost)],
debug=True)
application: basiccrud
version: 1
runtime: python27
api_version: 1
threadsafe: true
handlers:
- url: /.*
script: basiccrud.app