版本：11.x

靜態網站產生

提示

參考專案：https://github.com/trpc/examples-next-prisma-todomvc

靜態網站產生需要在每個頁面的 getStaticProps 中執行 tRPC 查詢。

可以使用伺服器端輔助程式來預先擷取查詢、將其脫水，並傳遞至頁面。然後，查詢會自動擷取 trpcState 並將其用作初始值。

在 `getStaticProps` 中擷取資料

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.dev.org.tw/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.dev.org.tw/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>
    </>
  );
}

請注意，react-query 的預設行為是在掛載時於用戶端重新擷取資料，因此如果你僅想透過 getStaticProps 擷取資料，則需要在查詢選項中將 refetchOnMount 和 refetchOnWindowFocus 設為 false。

如果你想將 API 要求次數降至最低，這可能是較好的做法，例如，如果你正在使用受限速率的第三方 API。

這可以針對每個查詢執行

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 },
);

或針對全域執行，如果應用程式中的每個查詢都應以相同方式運作

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(opts) {
    return {
      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(opts) {
    return {
      links: [
        httpBatchLink({
          url: `${getBaseUrl()}/api/trpc`,
        }),
      ],
      // Change options globally
      queryClientConfig: {
        defaultOptions: {
          queries: {
            refetchOnMount: false,
            refetchOnWindowFocus: false,
          },
        },
      },
    },
  },
});

如果你的應用程式包含靜態和動態查詢的混合，請小心使用此方法。

在 getStaticProps 中擷取資料​

在 `getStaticProps` 中擷取資料