Migration diagram

import { MigrationDiagram } from 'ts-prorm-orm';

const svg = new MigrationDiagram({
  title: 'Add author to posts',
  description: 'Link every post to the user who wrote it',
  timestamp: '2026-01-12',
  changes: [
    { table: 'posts', type: 'modify', changes: [
      { name: 'authorId', type: 'INTEGER', action: 'add',
        constraints: ['NOT NULL', 'REFERENCES users(id)'] },
      { name: 'title', type: 'VARCHAR(200)', oldType: 'VARCHAR(120)', action: 'modify' },
      { name: 'legacy_author', type: 'VARCHAR(100)', action: 'remove' },
    ] },
    { table: 'post_tags', type: 'add', changes: [
      { name: 'postId', type: 'INTEGER', action: 'add', constraints: ['PK'] },
      { name: 'tagId',  type: 'INTEGER', action: 'add', constraints: ['PK'] },
    ] },
  ],
}).generate();

diagram.save('docs/schema.svg');