schema0-db-schema（schema0 数据库架构）

Database Schema

File Location

packages/db/src/
├── index.ts          # Database client (createDb) and exports
├── schema/
│   ├── index.ts      # Barrel re-exports (export * from "./{entity}")
│   └── [entity].ts   # Table + all derived schemas (insert, select, update, form)
└── migrations/       # Auto-generated — never hand-write

7 Schemas Per Entity

Every entity file defines exactly 7 schemas:

1. Table definition -- pgTable(...) with text("id").primaryKey()
2. Insert schema -- createInsertSchema(table, overrides) with callback overrides for nullable columns
3. Select schema -- createSelectSchema(table, overrides) with callback overrides for nullable columns
4. Update schema -- selectSchema.partial().required({id: true})
5. Form schema -- insertSchema.omit({id, createdAt, updatedAt})
6. Edit form schema -- formSchema.partial() (NO id)
7. Router output schema -- z.object({...}) matching DB return types

Key Rules

• Callback overrides for nullable columns: colName: (schema) => schema.optional() in both insert and select schemas
• Server-stamped fields (e.g., userId, organizationId, createdBy): keep .notNull() on the table but mark .optional() in the insert schema. The server fills them in from session context. See references/schema-template.md > "Server-Stamped Fields".
• NEVER use .transform() -- breaks .omit() and .partial() chaining
• NEVER use serial() or bigint for primary keys -- only text("id").primaryKey()
• Router output: every column WITHOUT .notNull() needs .nullable().optional()
• timestamp() returns Date objects -- use z.date() in router output, NOT z.string()
• Form schemas belong in the entity file, not in index.ts
• Always use createDb() per request -- never singleton

Column Types Quick Reference

id: text("id").primaryKey(),
name: text("name").notNull(),
email: varchar("email", { length: 255 }).unique(),
age: integer("age"),
price: decimal("price", { precision: 10, scale: 2 }),
active: boolean("active").default(true),
metadata: jsonb("metadata").$type<{ key: string }>(),
createdAt: timestamp("created_at").defaultNow().notNull(),

References

• references/schema-template.md -- Full 7-schema code template with naming conventions, export, migration workflow, transform utilities
• references/column-types.md -- Column types reference, schema key rules, database client usage