Conference

Full-Stack Web Nanodegree ( Project 4 )

The project is a conference organization app.
The project consists of:

Setting up database
CRUD operation
User profiles
Conference information
Session information
User's Wishlist
Implementing API end points
Authentication and authorization
Creating Push Queue and Cron Job

The app is deployed on google cloud platform at https://conference-1151.appspot.com/

Requirements

Python 2.7
Google App Engine SDK for Python
Git
Terminal or command prompt

How to download

Open up your terminal or command prompt and enter the following command to download

$ git clone git@github.com:AungThiha/Conference.git

How To run the application locally

Open up your terminal or command prompt and run the command below:

$ dev_appserver.py .

Task 1: Add Sessions to a Conference

Explain your design choices

I created session model with the following datastore properties:

class Session(ndb.Model):
    """Session -- Session object"""
    name = ndb.StringProperty(required=True)
    highlights = ndb.StringProperty()
    speaker = ndb.StringProperty(required=True)
    duration = ndb.IntegerProperty()
    typeOfSession = ndb.StringProperty(repeated=True)
    date = ndb.DateProperty()
    startTime = ndb.TimeProperty()

Since a session without a name and a speaker wouldn't make sense, I implemented name and speaker as required fields.
Speaker is defined as a String property to avoid the need to create a separate speaker entity/kind.
Duration is better to be saved in Integer Value, so that we do not need to type cast when we need to make some calculation with it. So, I implemented duration as Integer property.
Session may belong to many types. For example, a session about Python belongs to two types that are Technology and Programming Languages. So, I implemented typeOfSession as repeated property.

Task 3: Work on indexes and queries

Come up with 2 additional queries

Say user would like to attend session when he/she free and he/she would be free only after a specific time, so he/she would like to check which sessions he/she can catch up with. In that case, I've implemented getSessionsAfter.
To use this endpoint, user need to pass date and freetime.

date is the Date user want to check on. It should be with the format of "%Y-%m-%d" (For example, "2015-12-28").
freetime is the time the user would start to be free. It should be with the format of "%H,%M" (For example, "4,45").
P.S. I use "%H,%M" instead of "%H:%M" to avoid url encoding for that specific part when passing it in as a parameter to make request using Google API Explorer.

Another query is that in case user would like to know who is attending the conference, I've implemented getAttenders.
To use this endpoint, user need to pass websafeConferenceKey. It is just url safe version of the key of the conference. It can be obtained using Datastore Viewer or querying using Google API Explorer.

Solve the following query related problem

Question: Let’s say that you don't like workshops and you don't like sessions after 7 pm. How would you handle a query for all non-workshop sessions before 7 pm? What is the problem for implementing this query? What ways to solve it did you think of?

Answer: Datastore has a limitation that inequality filters on multiple fields is not supported. One way to solve this is to query sessions before 7pm first and then filter it out in python code to remove sessions with a 'workshop' type.

AungThiha / Conference