输出验证

非官方测试版翻译

本页面由 PageTurner AI 翻译（测试版）。未经项目官方认可。 发现错误？ 报告问题 →

tRPC 默认提供输出结果的自动类型安全，无需额外添加验证器；但在某些场景下，严格定义输出类型可有效防止敏感数据泄露。

类似 input: 的用法，可通过 query() 和 mutation() 路由方法添加 output: 验证器。该验证器将处理 resolve() 函数返回的载荷。

当定义 output 验证器后，其推断类型将作为 resolve() 函数的预期返回类型。

信息

• 此功能完全可选，仅用于确保不会意外泄露敏感数据
• 若输出验证失败，服务端将返回 INTERNAL_SERVER_ERROR 错误

示例

tRPC 开箱即支持 yup/superstruct/zod/myzod/自定义验证器等方案 - 查看测试用例

使用 Zod

tsx
import * as trpc from '@trpc/server';
import { z } from 'zod';
// [...]
export const appRouter = trpc.router<Context>().query('hello', {
  output: z.object({
    greeting: z.string(),
  }),
  // expects return type of { greeting: string }
  resolve() {
    return {
      greeting: 'hello!',
    };
  },
});
export type AppRouter = typeof appRouter;

tsx
import * as trpc from '@trpc/server';
import { z } from 'zod';
// [...]
export const appRouter = trpc.router<Context>().query('hello', {
  output: z.object({
    greeting: z.string(),
  }),
  // expects return type of { greeting: string }
  resolve() {
    return {
      greeting: 'hello!',
    };
  },
});
export type AppRouter = typeof appRouter;

使用 Yup

tsx
import * as trpc from '@trpc/server';
import * as yup from 'yup';
// [...]
export const appRouter = trpc.router<Context>().query('hello', {
  output: yup.object({
    greeting: yup.string().required(),
  }),
  resolve() {
    return { greeting: 'hello!' };
  },
});
export type AppRouter = typeof appRouter;

tsx
import * as trpc from '@trpc/server';
import * as yup from 'yup';
// [...]
export const appRouter = trpc.router<Context>().query('hello', {
  output: yup.object({
    greeting: yup.string().required(),
  }),
  resolve() {
    return { greeting: 'hello!' };
  },
});
export type AppRouter = typeof appRouter;

使用 Superstruct

tsx
import * as trpc from '@trpc/server';
import * as t from 'superstruct';
// [...]
export const appRouter = trpc.router<Context>().query('hello', {
  input: t.string(),
  output: t.object({
    greeting: t.string(),
  }),
  resolve({ input }) {
    return { greeting: input };
  },
});
export type AppRouter = typeof appRouter;

tsx
import * as trpc from '@trpc/server';
import * as t from 'superstruct';
// [...]
export const appRouter = trpc.router<Context>().query('hello', {
  input: t.string(),
  output: t.object({
    greeting: t.string(),
  }),
  resolve({ input }) {
    return { greeting: input };
  },
});
export type AppRouter = typeof appRouter;

使用自定义验证器

tsx
import * as trpc from '@trpc/server';
import * as t from 'superstruct';
// [...]
export const appRouter = trpc.router<Context>().query('hello', {
  output: (value: any) => {
    if (value && typeof value.greeting === 'string') {
      return { greeting: value.greeting };
    }
    throw new Error('Greeting not found');
  },
  // expects return type of { greeting: string }
  resolve() {
    return { greeting: 'hello!' };
  },
});
export type AppRouter = typeof appRouter;

tsx
import * as trpc from '@trpc/server';
import * as t from 'superstruct';
// [...]
export const appRouter = trpc.router<Context>().query('hello', {
  output: (value: any) => {
    if (value && typeof value.greeting === 'string') {
      return { greeting: value.greeting };
    }
    throw new Error('Greeting not found');
  },
  // expects return type of { greeting: string }
  resolve() {
    return { greeting: 'hello!' };
  },
});
export type AppRouter = typeof appRouter;