Entity Relationship Diagrams

What is an entity relationship diagram

• Used to model relationships among entities such as database tables
• Each entity contains an entity name and attributes (e.g. a table containing table name and fields)
• Each attribute can have an attribute name, type, and metadata (e.g. id string pk)
• Full syntax documentation found here

How to insert a new entity relationship diagram (see how)

1. Click on the "+" button or / shortcut on the canvas
2. Select "Diagram as Code" from the menu
3. Select "Entity Relationship" from the menu

How to edit an entity relationship diagram (see how)

Eraser's entity relationship diagrams are created and edited in code form, a concept we call Diagram-as-Code

1. Double-click on the diagram to open the code editor

2. Each line of code represents a message or a statement

   • Try adding a new table with:

   subfolders {
     id string
     parentFolderId string
   }
   

   • Try adding a new relationship with: oo oo

   subfolders.parentFolderId > folder.id

3. Click on the "Syntax Help" button or "Documentation" to learn more

Drawing canvas

Entity Relationship Diagram