# Database

## Details
### file location
`/engagement/models.py`  

### usage
this app keeps all record of user engagement  

## Models

### CoachFollow  
- each entry represents one follow to coach  
- `coach` => fk related to `user.User`, representing the coach being followed  
- `followed_by` => fk related to `user.User`, representing the user that follow the coach  
- unique together constraint is set for `coach` and `followed_by`  

### QNAEngagement
this model has been deprecated if remember correctly  


### Engagement  
each entry represents one post like 
when a user un-like a post, delete the old entry  

### Bookmark
each entry represent one bookmark  
when a user unmark the post, delete the old entry