refactor: migrate documentation to support multi-language structure with i18n integration
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Mathis HERRIOT
2026-01-05 01:23:00 +01:00
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---
title: Conception de la Base de Données
description: MCD, MLD et MPD de MemeGoat.
---
## Modèle Conceptuel des Données (MCD)
Le MCD définit les entités et leurs relations.
```mermaid
erDiagram
UTILISATEUR ||--o{ MEME : "crée"
UTILISATEUR ||--o{ COMMENTAIRE : "écrit"
MEME ||--o{ COMMENTAIRE : "reçoit"
MEME }o--o{ TAG : "possède"
UTILISATEUR {
string pseudo
string email
string mot_de_passe
datetime date_creation
}
MEME {
string titre
string url_image
datetime date_creation
}
TAG {
string nom
}
COMMENTAIRE {
string contenu
datetime date_creation
}
```
## Modèle Logique des Données (MLD)
Le MLD traduit le MCD en tables avec les clés étrangères.
```mermaid
erDiagram
users ||--o{ memes : "user_id"
users ||--o{ comments : "user_id"
memes ||--o{ comments : "meme_id"
memes ||--o{ meme_tags : "meme_id"
tags ||--o{ meme_tags : "tag_id"
users {
uuid id PK
varchar username
varchar email
text password_hash
timestamp created_at
}
memes {
uuid id PK
varchar title
text image_url
uuid user_id FK
timestamp created_at
}
tags {
uuid id PK
varchar name
}
meme_tags {
uuid meme_id FK
uuid tag_id FK
}
comments {
uuid id PK
text content
uuid user_id FK
uuid meme_id FK
timestamp created_at
}
```
## Modèle Physique des Données (MPD)
Implémentation SQL pour PostgreSQL.
```sql
CREATE TABLE users (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
username VARCHAR(50) UNIQUE NOT NULL,
email VARCHAR(255) UNIQUE NOT NULL,
password_hash TEXT NOT NULL,
created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE memes (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
title VARCHAR(255) NOT NULL,
image_url TEXT NOT NULL,
user_id UUID REFERENCES users(id) ON DELETE SET NULL,
created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);
CREATE TABLE tags (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
name VARCHAR(50) UNIQUE NOT NULL
);
CREATE TABLE meme_tags (
meme_id UUID REFERENCES memes(id) ON DELETE CASCADE,
tag_id UUID REFERENCES tags(id) ON DELETE CASCADE,
PRIMARY KEY (meme_id, tag_id)
);
CREATE TABLE comments (
id UUID PRIMARY KEY DEFAULT gen_random_uuid(),
content TEXT NOT NULL,
user_id UUID REFERENCES users(id) ON DELETE SET NULL,
meme_id UUID REFERENCES memes(id) ON DELETE CASCADE,
created_at TIMESTAMP WITH TIME ZONE DEFAULT CURRENT_TIMESTAMP
);
```