Entity Relationship Diagram MermaidJS Example

Last modified: February 28, 2023

MermaidJs help

FlowChart

direction - top to down

graph TD
  a-->b

direction - left to right

graph LR

Shape: round rect

id(Label)

Shape: circle

id((Start))

Shape: cylinder/database

id[(Database)]

Shape: rhombus

id{is successful}

Shape: double circle

id(((End)))

Edges: with arrow head

flowchart LR
  A-->B

Edges: without arrow

flowchart LR
  A --- B

Edges: with text

flowchart LR
  A---|This is the text|B

Sequence Diagram

line types

sequenceDiagram
  a->b: solid no arrow
  a-->b: dashed no arrow
  a-->>b: dashed with arrow
  b-->>a: reverse

Class Diagrams

define class

classDiagram
class Person{
    String name
}

xxxxxxxxxx
 
---
title: ERD
---
classDiagram
  class Organization {
    String url
    int id
  }
  class User {
    String avatar
    String email
  }
  class Repository {
    String name
    int stargazers_count
  }
​
  Repository --> User: stargazers
  Organization --> Repository: repos
  Organization --> User: members

FullScreen