Troubleshooting the use of CDN in a Sanity.io project

const options = {
	projectId: process.env.NEXT_PUBLIC_SANITY_PROJECT_ID,
	dataset: process.env.NEXT_PUBLIC_SANITY_DATASET_NAME,
	apiVersion: "2022-01-18", //date project was initialized
	useCDN: process.env.NEXT_PUBLIC_SANITY_DATASET_NAME === "production", <= results in true
};

import sanityClient from '@sanity/client';

export const client = sanityClient({
  projectId: 'your-project-id',
  dataset: 'your-dataset',
  apiVersion: '2022-09-16', // use current UTC date - see "specifying API version"!
  token: 'sanity-auth-token', // or leave blank for unauthenticated usage
  useCdn: true, // `false` if you want to use the API
});

import sanityClient from '@sanity/client';

const options = {
    projectId: process.env.NEXT_PUBLIC_SANITY_PROJECT_ID, //points to the .env.local file
    dataset: process.env.NEXT_PUBLIC_SANITY_DATASET_NAME, //points to the .env.local file
    apiVersion: '2022-01-18', //date project was initialized
    useCDN: process.env.NEXT_PUBLIC_SANITY_DATASET_NAME === "production" // use false for dev or true for optimized speeds with cached data
};

export default sanityClient(options);

/studio/lib/isUniqueAcrossAllDocuments.js

import sanityClient from "part:@sanity/base/client";
const client = sanityClient.withConfig({apiVersion: '2022-01-18'})

// Note: this assumes that every document that has a slug field
// has it on the `slug` field at the root
export function isUniqueAcrossAllDocuments(slug, options) {
  const { document } = options;

  const id = document._id.replace(/^drafts\./, "");
  const params = {
    draft: `drafts.${id}`,
    published: id,
    slug,
  };

  const query = `!defined(*[
      !(_id in [$draft, $published]) && 
      slug.current == $slug
    ][0]._id)`;

  return client.fetch(query, params);
}

// Referenced in /next.config.js
const sanityClient = require("@sanity/client");

const options = {
	projectId: process.env.NEXT_PUBLIC_SANITY_PROJECT_ID, //points to the .env.local file
	dataset: process.env.NEXT_PUBLIC_SANITY_DATASET_NAME, //points to the .env.local file
	apiVersion: "2022-01-18", //date project was initialized
	useCDN: process.env.NEXT_PUBLIC_SANITY_DATASET_NAME === "production", // use false for dev or true for optimized speeds with cached data
};

const client = sanityClient(options);

const redirectsProjects = `
    redirectList[]{
        destination,
        source,
        permanent,
		basePath
    }
`;

async function generateRedirects() {
	const redirects = await client.fetch(
		`
        *[_type == "redirects"][0] {${redirectsProjects}}
        `
	);
	return redirects.redirectList || [];
}
module.exports = {generateRedirects};

import sanityClient from "helpers/sanity";
import imageUrlBuilder from "@sanity/image-url";

// Bunch of projections

export async function getBlogBySlug(slug) {
  const results = await sanityClient.fetch(
    `
      *[_type == "blog" && slug.current == $slug][0] {${singleBlogProjection}}
    `,
    { slug }
  );
  return results;
}

// Bunch more queries

const builder = imageUrlBuilder(sanityClient);
export function urlFor(source) {
  // This builder lets you provide additional parameters
  return builder.image(source);
}