Drizzle ORM Schema Style Guide

Configuration

• Config: drizzle.config.ts
• Schemas: src/database/schemas/
• Migrations: src/database/migrations/
• Dialect: postgresql with strict: true

Helper Functions

Location: src/database/schemas/_helpers.ts

• timestamptz(name): Timestamp with timezone
• createdAt(), updatedAt(), accessedAt(): Standard timestamp columns
• timestamps: Object with all three for easy spread

Naming Conventions

• Tables: Plural snake_case (users, session_groups)
• Columns: snake_case (user_id, created_at)

Column Definitions

Primary Keys

id: text('id')
  .primaryKey()
  .$defaultFn(() => idGenerator('agents'))
  .notNull(),

ID prefixes make entity types distinguishable. For internal tables, use uuid.

Foreign Keys

userId: text('user_id')
  .references(() => users.id, { onDelete: 'cascade' })
  .notNull(),

Timestamps

...timestamps,  // Spread from _helpers.ts

Indexes

// Return array (object style deprecated)
(t) => [uniqueIndex('client_id_user_id_unique').on(t.clientId, t.userId)],

Type Inference

export const insertAgentSchema = createInsertSchema(agents);
export type NewAgent = typeof agents.$inferInsert;
export type AgentItem = typeof agents.$inferSelect;

Example Pattern

export const agents = pgTable(
  'agents',
  {
    id: text('id')
      .primaryKey()
      .$defaultFn(() => idGenerator('agents'))
      .notNull(),
    slug: varchar('slug', { length: 100 })
      .$defaultFn(() => randomSlug(4))
      .unique(),
    userId: text('user_id')
      .references(() => users.id, { onDelete: 'cascade' })
      .notNull(),
    clientId: text('client_id'),
    chatConfig: jsonb('chat_config').$type<LobeAgentChatConfig>(),
    ...timestamps,
  },
  (t) => [uniqueIndex('client_id_user_id_unique').on(t.clientId, t.userId)],
);

Common Patterns

Junctio...