Simple data model

Start from this entity-relationship template when documenting a SaaS data model: users own folders and diagrams, folders contain diagrams, and favorites link users to diagrams.

Attribute blocks show primary keys and foreign keys so you can extend the schema without redrawing from scratch.

Open in SayDiagram to rearrange entities on the Arrange canvas or export for design tools.

erDiagram
  USER ||--o{ FOLDER : owns
  USER ||--o{ DIAGRAM : owns
  FOLDER ||--o{ DIAGRAM : contains
  USER }o..o{ DIAGRAM : favorites
  USER {
    string id PK
    string email UK
  }
  FOLDER {
    string id PK
    string name
  }
  DIAGRAM {
    string id PK
    string folderId FK
    string title
    string visibility
  }