added sanic motor (async driver for mongodb) example

examples/sanic_motor.py

@@ -0,0 +1,44 @@
+""" sanic motor (async driver for mongodb) example
+Required packages:
+pymongo==3.4.0
+motor==1.1
+sanic==0.2.0
+"""
+import asyncio
+import uvloop
+from sanic import Sanic
+from sanic.response import json
+
+
+asyncio.set_event_loop_policy(uvloop.EventLoopPolicy())
+app = Sanic('motor_mongodb')
+
+
+def get_db():
+    from motor.motor_asyncio import AsyncIOMotorClient
+    mongo_uri = "mongodb://127.0.0.1:27017/test"
+    client = AsyncIOMotorClient(mongo_uri)
+    return client['test']
+
+
+@app.route('/objects', methods=['GET'])
+async def get(request):
+    db = get_db()
+    docs = await db.test_col.find().to_list(length=100)
+    for doc in docs:
+        doc['id'] = str(doc['_id'])
+        del doc['_id']
+    return json(docs)
+
+
+@app.route('/post', methods=['POST'])
+async def new(request):
+    doc = request.json
+    print(doc)
+    db = get_db()
+    object_id = await db.test_col.save(doc)
+    return json({'object_id': str(object_id)})
+
+
+if __name__ == "__main__":
+    app.run(host='127.0.0.1', port=8000)