Assignment 2

Submission deadline: Wednesday October 30, 11:59pm

Review deadline: Monday November 4, 11:59pm

Assignment link: http://www.crowdgrader.org/crowdgrader/venues/view_venue/143

Submission link: http://www.crowdgrader.org/crowdgrader/submission/view_own_submission/v/143

Review link: http://www.crowdgrader.org/crowdgrader/venues/reviewing_duties/143

Write a multi-user to-do app. A user can log in, and create to-do notes for hemself, or for other users. The users that are the recipient of a to-do note can either accept or reject it. If they accept it, they can, at a later time, label it as done.

In detail:

• A to-do item should have a title, and a (text) description.
• A user should be able to view the list of all to-dos assigned to hem, and (separately) the list of all to-do items se has assigned to others. (Maybe include links to these two list views on the home page?)
• If a user A assigns a to-do item to a user B, only A and B should be able to see the to-do item.
• Users refer to each other by email address. If a user tries to make a to-do item for a user that does not exist, raise an error. (Note: The nice solution would be to generate an invitation email for that student, containing a link that, when clicked, leads the user to create an account. We will work on that in a later assignment).

Careful about:

• Avoid including static URLs in your code. Use the URL() web2py helper to construct all URLs.

Note on the language:

In English, "it" has no sex; he and she are M and F.

I am using se, hem as pronouns with sex MF (i.e., for things with sex that can be either M or F).

When you will study lattices, you will see that I am creating a boolean lattice of pronouns, in which se is the least upper bound of he and she.