I have built a website based on Google App Engine. It includes ten models, doing some simple calculations based on user inputs. Previously, it was coded using Python 2.5 using djangoform.modelform and db.model to handle data. Since Python 2.7 does not support djangoform.modelform, I would like to use django modelform instead. However, during the migration, I met some problems(sever internal error). when I was trying to add a form by Django.forms.Modelform. I have provided my old codes and new one (does not work). My questions are:
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How to use Django library to solve my problem?
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If it is possible, do I have to make my website a project, and create ten apps for models?
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Do I have to modify my yaml file, and create new url.py, setting.py, etc?
I really appreciate for any comment and suggestion. I am using Python 2.7, GAE 1.6.2 and Django 1.2.
Here is the code (code 1) with problem.
import webapp2 as webapp
import django
from google.appengine.ext.webapp.util import run_wsgi_app
from google.appengine.ext.webapp import template
import os
from django.db import models
from django.forms import ModelForm
class trexInp(models.Model):
chemical_name = models.CharField(max_length=255)
class trexInput(ModelForm):
class Meta:
model = trexInp
class trexInputPage(webapp.RequestHandler):
def get(self):
html = str(trexInput())
self.response.out.write(html)
app = webapp.WSGIApplication([('/.*', trexInputPage)], debug=True)
def main():
run_wsgi_app(app)
if __name__ == '__main__':
main()
To compare, I have attached the old code (Code 2).
import webapp2 as webapp
from google.appengine.ext.webapp.util import run_wsgi_app
from google.appengine.ext import db
from google.appengine.ext.webapp import template
from google.appengine.ext.db import djangoforms
class trexInp(db.Model):
chemical_name = db.StringProperty()
class trexInput(djangoforms.ModelForm):
class Meta:
model = trexInp
class trexInputPage(webapp.RequestHandler):
def get(self):
html = str(trexInput())
self.response.out.write(html)
app = webapp.WSGIApplication([('/.*', trexInputPage)], debug=True)
def main():
run_wsgi_app(app)
if __name__ == '__main__':
main()
Here is my app.yaml file
application: pypest1
version: 1
runtime: python27
api_version: 1
threadsafe: false
libraries:
- name: numpy
version: latest
- name: webapp2
version: latest
- name: django
version: "1.2"
handlers:
- url: /
script: main.py
- url: /index.html
script: main.py
#t-rex
- url: /trex_input.html
script: trex/trex_input.py
My main.py file
import os
os.environ[‘DJANGO_SETTINGS_MODULE’]=’global_settings’
import webapp2 as webapp
from google.appengine.ext.webapp.util import run_wsgi_app
from google.appengine.ext.webapp import template
from google.appengine.ext.db import djangoforms
class defaultPage(webapp.RequestHandler):
def get(self):
html = template.render('templates/01.html', {'title':'model'})
self.response.out.write(html)
app = webapp.WSGIApplication([('/.*', defaultPage)], debug=True)
def main():
run_wsgi_app(app)
if __name__ == '__main__':
main()
Here is the server log:
2012-02-24 22:40:55 Running command: "['C:\\Python27\\pythonw.exe', 'C:\\Program Files (x86)\\Google\\google_appengine\\dev_appserver.py', '--admin_console_server=', '--port=8082', u'C:\\Users\\tao\\Dropbox\\AppPest1']"
WARNING 2012-02-25 03:40:57,216 rdbms_mysqldb.py:74] The rdbms API is not available because the MySQLdb library could not be loaded.
INFO 2012-02-25 03:40:57,486 dev_appserver_multiprocess.py:650] Running application dev~pypest1 on port 8082: http://localhost:8082
INFO 2012-02-25 03:40:57,486 dev_appserver_multiprocess.py:652] Admin console is available at: http://localhost:8082/_ah/admin
WARNING 2012-02-25 03:40:59,211 py_zipimport.py:139] Can't open zipfile C:\Python27\lib\site-packages\setuptools-0.6c11-py2.7.egg-info: IOError: [Errno 13] file not accessible: 'C:\\Python27\\lib\\site-packages\\setuptools-0.6c11-py2.7.egg-info'
INFO 2012-02-25 03:40:59,611 dev_appserver.py:2865] "GET / HTTP/1.1" 200 -
INFO 2012-02-25 03:40:59,671 dev_appserver.py:2865] "GET /stylesheets/style.css HTTP/1.1" 304 -
INFO 2012-02-25 03:40:59,720 dev_appserver.py:2865] "GET /images/valid-xhtml10-blue.png HTTP/1.1" 304 -
INFO 2012-02-25 03:40:59,767 dev_appserver.py:2865] "GET /images/valid-css-blue.png HTTP/1.1" 304 -
INFO 2012-02-25 03:40:59,816 dev_appserver.py:2865] "GET /stylesheets/images/bg.jpg HTTP/1.1" 304 -
INFO 2012-02-25 03:40:59,867 dev_appserver.py:2865] "GET /stylesheets/images/header.jpg HTTP/1.1" 304 -
INFO 2012-02-25 03:41:00,023 dev_appserver.py:2865] "GET /stylesheets/images/intro.jpg HTTP/1.1" 304 -
INFO 2012-02-25 03:41:00,381 dev_appserver.py:2865] "GET /favicon.ico HTTP/1.1" 404 -
INFO 2012-02-25 03:41:01,177 dev_appserver.py:2865] "GET /trex_description.html HTTP/1.1" 200 -
INFO 2012-02-25 03:41:01,538 dev_appserver.py:2865] "GET /stylesheets/style.css HTTP/1.1" 304 -
INFO 2012-02-25 03:41:01,585 dev_appserver.py:2865] "GET /images/valid-xhtml10-blue.png HTTP/1.1" 304 -
INFO 2012-02-25 03:41:01,632 dev_appserver.py:2865] "GET /images/valid-css-blue.png HTTP/1.1" 304 -
INFO 2012-02-25 03:41:01,783 dev_appserver.py:2865] "GET /stylesheets/images/bg.jpg HTTP/1.1" 304 -
INFO 2012-02-25 03:41:01,891 dev_appserver.py:2865] "GET /stylesheets/images/header.jpg HTTP/1.1" 304 -
INFO 2012-02-25 03:41:01,940 dev_appserver.py:2865] "GET /stylesheets/images/intro.jpg HTTP/1.1" 304 -
INFO 2012-02-25 03:41:01,996 dev_appserver.py:2865] "GET /favicon.ico HTTP/1.1" 404 -
WARNING 2012-02-25 03:41:03,632 py_zipimport.py:139] Can't open zipfile C:\Python27\lib\site-packages\setuptools-0.6c11-py2.7.egg-info: IOError: [Errno 13] file not accessible: 'C:\\Python27\\lib\\site-packages\\setuptools-0.6c11-py2.7.egg-info'
ERROR 2012-02-25 03:41:03,657 cgi.py:121] Traceback (most recent call last):
File "C:\Users\tao\Dropbox\AppPest1\trex\trex_input.py", line 33, in <module>
class trexInp(models.Model):
File "C:\Program Files (x86)\Google\google_appengine\lib\django_1_2\django\db\models\base.py", line 50, in __new__
kwargs = {"app_label": model_module.__name__.split('.')[-2]}
IndexError: list index out of range
INFO 2012-02-25 03:41:03,686 dev_appserver.py:2865] "GET /trex_input.html HTTP/1.1" 500 -
I can’t help you with your specific code, but I had to do a similar task (replace djangoforms) myself recently. This is the change that I cam up with. Hopefully you can learn something from it:
http://code.google.com/p/rietveld/source/diff?spec=svn33bb90856ee02a26fa70c873658e91df445aca93&r=33bb90856ee02a26fa70c873658e91df445aca93&format=side&path=/codereview/views.py