dwliao / meetdude Goto Github PK

Notification / Notifications

1. Column
   type(int): Notification kind
   user_id(int): source user
   target_id(int): target user
   is_read(bool): has been read or not, default is false

2. Notification kind (type)
   0: receive post
   1: receive friend invitation

3. Model relationship
   Notification belong to User
   User has many Notifications
   Notification.target -> user
   user.notifications -> notification array

4. Model class method (scope)
   unread_notifications

Need class method of Post model which can handle given inputs and return some posts which related to specific user id

Input parameter:

1. user_id: specific user id
2. search_type:
   • 'TO': search posts which write to specific user
   • 'FROM': search posts which write from specific user
3. start_search_time: timestamp(UTC -> integer) as start point of the search
4. is_forward:
   • true: search posts newer than start_search_time
   • false: search posts older than start_search_time
5. limit_number: (option) limit search number, nil means all

Return:

• posts: array of posts which descending order by updated_at

Notes:

To reach this goal as Rails way, maybe we can chain some customized scopes

We need some model tests which cover:

1. target_id shouldn't be null when create post
2. user.target_posts should get all posts which target_id is equal to user.id
3. user.posts should get all posts which user_id is equal to user.id
4. post.user should get user which id is equal to post.user_id
5. post.target should get user which id is equal to post.target_id