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Context

Baeta allows you to define a shared context that's available throughout your resolvers and middlewares.

Define Context Type​

First, define your context type:

// src/context.ts
import type { PubSub } from "graphql-yoga";
import type { PubSubMap } from "../lib/pubsub";
import type { PrismaClient } from "../lib/db/prisma";

export type Context = {
  db: PrismaClient;
  pubsub: PubSub<PubSubMap>;
};

Configuration​

Add the context type path to your baeta.ts configuration:

import { defineConfig } from "@baeta/cli";
import { autoloadPlugin } from "@baeta/plugin-autoload";

export default defineConfig({
  graphql: {
    schemas: ["src/**/*.gql"],
    contextType: "src/context#Context", // Path to context type
  },
  // ... rest of config
});

Usage in Resolvers​

The context is automatically typed in your resolvers:

const { Query } = getUserModule();

Query.user(({ args, ctx }) => {
  // ctx is typed as Context
  return ctx.db.user.findUnique({
    where: args.where,
  });
});

Usage in Middlewares​

Middlewares also get the typed context:

Mutation.updateUser.$use(async ({ ctx }, next) => {
  // ctx is typed as Context
  const result = await next();
  ctx.pubsub.publish("user-updated", result);
  return result;
});