Add a basic appengine demo, that can be run with run.sh (assuming appengine...

Add a basic appengine demo, that can be run with run.sh (assuming appengine SDK is installed). Verifies a few standard NDB/DB Models render well enough.

examples/appengine/app.py

+
+from flask import Flask
+import flask_admin
+from flask_admin.contrib import appengine
+from google.appengine.ext import db
+from google.appengine.ext import ndb
+
+# Create application
+app = Flask(__name__)
+
+# Create dummy secrey key so we can use sessions
+app.config['SECRET_KEY'] = '123456790'
+
+admin = flask_admin.Admin(app, name="Admin")
+
+# Flask views
+@app.route('/')
+def index():
+    return '<a href="/admin/">Click me to get to Admin!</a>'
+
+class Car(db.Model):
+    owner = db.StringProperty()
+    make_model = db.StringProperty()
+    indexed_int = db.IntegerProperty()
+    unindexed_int = db.IntegerProperty(indexed=False)
+
+class Tire(db.Model):
+    car = db.ReferenceProperty(Car)
+    position = db.StringProperty()
+
+class House(ndb.Model):
+    address = db.StringProperty()
+    json_property = ndb.JsonProperty()
+    indexed_int = ndb.IntegerProperty()
+    unindexed_int = ndb.IntegerProperty(indexed=False)
+    text_property = ndb.TextProperty()
+    datetime_property = ndb.DateTimeProperty()
+
+class Room(ndb.Model):
+    house = ndb.KeyProperty(kind=House)
+    name = ndb.StringProperty()
+
+admin.add_view(appengine.ModelView(Car))
+admin.add_view(appengine.ModelView(Tire))
+admin.add_view(appengine.ModelView(House))
+admin.add_view(appengine.ModelView(Room))
+
+if __name__ == '__main__':
+
+    # Start app
+    app.run(debug=True)

examples/appengine/app.yaml

+runtime: python27
+threadsafe: true
+api_version: 1
+module: default
+
+handlers:
+- url: /admin.*
+  script: app.app

examples/appengine/appengine_config.py

+# This file gets imported as part of running dev_appserver.py
+import sys
+sys.path = ['lib'] + sys.path

examples/appengine/run.sh

+BASEDIR=$(dirname $0)
+# Install wtforms-admin to our lib/ directory, using our local source tree
+pip install -t $BASEDIR/lib/ $BASEDIR/../.. wtforms_appengine
+# Now run our server
+dev_appserver.py $BASEDIR/app.yaml