Server Side Calls

You may need to call your procedure(s) directly from the server, createCaller() function returns you an instance of RouterCaller able to execute queries and mutations.

Input query example

server/trpc/init.ts

import { initTRPC } from '@trpc/server';
import { z } from 'zod';

const t = initTRPC.create();

export const router = t.router({
  // Create procedure at path 'greeting'
  greeting: t.procedure
    .input(z.object({ name: z.string() }))
    .query(({ input }) => `Hello ${input.name}`),
});

server/api/greeting.ts

import { appRouter } from '~/server/trpc/routers';

export default defineEventHandler(async (event) => {
  const { name } = getQuery(event);
  const caller = appRouter.createCaller({});

  const greeting = await caller.greeting({ name });

  return {
    greeting,
  };
});

Mutation example

server/trpc/init.ts

import { initTRPC } from '@trpc/server';
import { z } from 'zod';

const posts = ['One', 'Two', 'Three'];

const t = initTRPC.create();

export const router = t.router({
  post: t.router({
    add: t.procedure.input(z.string()).mutation(({ input }) => {
      posts.push(input);
      return posts;
    }),
  }),
});

server/api/post.ts

import { appRouter } from '@/server/trpc/routers';

export default defineEventHandler(async (event) => {
  const body = await getBody(event);
  const caller = appRouter.createCaller({});

  const post = await caller.post.add(body.post);

  return {
    post,
  };
});