版本：10.x

静态站点生成

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技巧

参考项目：https://github.com/trpc/examples-next-prisma-todomvc

静态站点生成需要在每个页面的 getStaticProps 中执行 tRPC 查询。

这可以通过服务端辅助工具实现：预取查询、脱水处理并将状态传递给页面。查询会自动获取 trpcState 并将其作为初始值使用。

在 `getStaticProps` 中获取数据

pages/posts/[id].tsx
tsx
import { createServerSideHelpers } from '@trpc/react-query/server';
import {
  GetStaticPaths,
  GetStaticPropsContext,
  InferGetStaticPropsType,
} from 'next';
import { prisma } from 'server/context';
import { appRouter } from 'server/routers/_app';
import superjson from 'superjson';
import { trpc } from 'utils/trpc';
export async function getStaticProps(
  context: GetStaticPropsContext<{ id: string }>,
) {
  const helpers = createServerSideHelpers({
    router: appRouter,
    ctx: {},
    transformer: superjson, // optional - adds superjson serialization
  });
  const id = context.params?.id as string;
  // prefetch `post.byId`
  await helpers.post.byId.prefetch({ id });
  return {
    props: {
      trpcState: helpers.dehydrate(),
      id,
    },
    revalidate: 1,
  };
}
export const getStaticPaths: GetStaticPaths = async () => {
  const posts = await prisma.post.findMany({
    select: {
      id: true,
    },
  });
  return {
    paths: posts.map((post) => ({
      params: {
        id: post.id,
      },
    })),
    // https://nextjs.org/docs/pages/api-reference/functions/get-static-paths#fallback-blocking
    fallback: 'blocking',
  };
};
export default function PostViewPage(
  props: InferGetStaticPropsType<typeof getStaticProps>,
) {
  const { id } = props;
  const postQuery = trpc.post.byId.useQuery({ id });
  if (postQuery.status !== 'success') {
    // won't happen since we're using `fallback: "blocking"`
    return <>Loading...</>;
  }
  const { data } = postQuery;
  return (
    <>
      <h1>{data.title}</h1>
      <em>Created {data.createdAt.toLocaleDateString('en-us')}</em>
      <p>{data.text}</p>
      <h2>Raw data:</h2>
      <pre>{JSON.stringify(data, null, 4)}</pre>
    </>
  );
}

pages/posts/[id].tsx
tsx
import { createServerSideHelpers } from '@trpc/react-query/server';
import {
  GetStaticPaths,
  GetStaticPropsContext,
  InferGetStaticPropsType,
} from 'next';
import { prisma } from 'server/context';
import { appRouter } from 'server/routers/_app';
import superjson from 'superjson';
import { trpc } from 'utils/trpc';
export async function getStaticProps(
  context: GetStaticPropsContext<{ id: string }>,
) {
  const helpers = createServerSideHelpers({
    router: appRouter,
    ctx: {},
    transformer: superjson, // optional - adds superjson serialization
  });
  const id = context.params?.id as string;
  // prefetch `post.byId`
  await helpers.post.byId.prefetch({ id });
  return {
    props: {
      trpcState: helpers.dehydrate(),
      id,
    },
    revalidate: 1,
  };
}
export const getStaticPaths: GetStaticPaths = async () => {
  const posts = await prisma.post.findMany({
    select: {
      id: true,
    },
  });
  return {
    paths: posts.map((post) => ({
      params: {
        id: post.id,
      },
    })),
    // https://nextjs.org/docs/pages/api-reference/functions/get-static-paths#fallback-blocking
    fallback: 'blocking',
  };
};
export default function PostViewPage(
  props: InferGetStaticPropsType<typeof getStaticProps>,
) {
  const { id } = props;
  const postQuery = trpc.post.byId.useQuery({ id });
  if (postQuery.status !== 'success') {
    // won't happen since we're using `fallback: "blocking"`
    return <>Loading...</>;
  }
  const { data } = postQuery;
  return (
    <>
      <h1>{data.title}</h1>
      <em>Created {data.createdAt.toLocaleDateString('en-us')}</em>
      <p>{data.text}</p>
      <h2>Raw data:</h2>
      <pre>{JSON.stringify(data, null, 4)}</pre>
    </>
  );
}

请注意，react-query 的默认行为是在客户端挂载时重新获取数据。如果希望仅通过 getStaticProps 获取数据，需要在查询选项中设置 refetchOnMount 和 refetchOnWindowFocus 为 false。

这种做法特别适合需要最小化 API 请求的场景，例如使用第三方限流 API 时。

可以针对单个查询进行设置：

tsx
const data = trpc.example.useQuery(
  // if your query takes no input, make sure that you don't
  // accidentally pass the query options as the first argument
  undefined,
  { refetchOnMount: false, refetchOnWindowFocus: false },
);

tsx
const data = trpc.example.useQuery(
  // if your query takes no input, make sure that you don't
  // accidentally pass the query options as the first argument
  undefined,
  { refetchOnMount: false, refetchOnWindowFocus: false },
);

也可以全局设置（当应用内所有查询需要统一行为时）：

utils/trpc.ts
tsx
import { httpBatchLink } from '@trpc/client';
import { createTRPCNext } from '@trpc/next';
import superjson from 'superjson';
import type { AppRouter } from './api/trpc/[trpc]';
export const trpc = createTRPCNext<AppRouter>({
  config(config) {
    return {
      transformer: superjson,
      links: [
        httpBatchLink({
          url: `${getBaseUrl()}/api/trpc`,
        }),
      ],
      // Change options globally
      queryClientConfig: {
        defaultOptions: {
          queries: {
            refetchOnMount: false,
            refetchOnWindowFocus: false,
          },
        },
      },
    },
  },
});

utils/trpc.ts
tsx
import { httpBatchLink } from '@trpc/client';
import { createTRPCNext } from '@trpc/next';
import superjson from 'superjson';
import type { AppRouter } from './api/trpc/[trpc]';
export const trpc = createTRPCNext<AppRouter>({
  config(config) {
    return {
      transformer: superjson,
      links: [
        httpBatchLink({
          url: `${getBaseUrl()}/api/trpc`,
        }),
      ],
      // Change options globally
      queryClientConfig: {
        defaultOptions: {
          queries: {
            refetchOnMount: false,
            refetchOnWindowFocus: false,
          },
        },
      },
    },
  },
});

若应用中同时存在静态和动态查询，请谨慎使用此方法。

在 getStaticProps 中获取数据​

在 `getStaticProps` 中获取数据