|  | 4f1a44549b | ERB msg done (#14) # Entity relational diagram
## Messaging extension
```mermaid
%%{init: { "er": {"fontSize": 25}}}%%
erDiagram
%% General
Users
%% Messages
Discussions{
    Integer id PK
    String name
}
Messages{
    Integer id PK
    Integer response FK "Messages"
    String content
}
Discussions ||--o{ Messages: ""
Discussions ||--o{ Users: ""
Messages o|--o{ Messages: "answers"
%% Forums
Forums{
    Integer id PK
    String name
}
Topics{
    Integer id PK
    String subject
    String content
    Boolean locked
}
Answers{
    Integer id PK
    String content
    Boolean anonymous
    TimeStamp creation_time
}
Polls{
    Integer id PK
    enum PollType
}
Options{
    Integer id PK
    String name
}
Forums ||--o{ Users: "Registered"
Forums ||--|| Teacher: "Owner"
Forums ||--|| Course: ""
Forums ||--o{ Topics: ""
Forums ||--o{ Polls: ""
Topics ||--|| Teacher: "Author"
Topics ||--|| Users: "Author"
Topics ||--o{ Answers: ""
Polls ||--o{ Options: ""
Options ||--o{ Votes : ""
Votes }o--|| Users: "Voter"
%% Appointments
Teachers
Appointments{
    Integer id PK
    TIME sent_time
    enum Status
}
Appointments ||--|| Teachers: ""
Appointments ||--|| Users: ""
```
Debucquoy Anthony
Co-authored-by: Debucquoy <debucqquoy.anthony@gmail.com>
Reviewed-on: #14
Reviewed-by: Maxime <231026@umons.ac.be> | 2023-12-15 14:36:10 +01:00 |  |