I got this error, althought I fill the env.local file with the data, I use nextjs

I wonder what's the issue is? I read that next js automatically handle env variables

34 Replies

Hi @Nas-damha. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Next.js does handle environment variables automatically, but there are a few things you need to ensure: 1. The .env.local file should be in your project root directory. If it's in a different location, Next.js might not be able to find it. 2. If you have the same variables declared in both .env and .env.local, the values in .env.local will override the defaults. 3. Environment variables in Next.js are only available for use on the server by default. This means you can only use them in any of Next.js data fetching methods (getServerSideProps, getStaticProps, and getStaticPaths) or API routes. If you want to use environment variables in the browser, you need to prefix them with NEXT_PUBLIC_. 4. Next.js will always search for an environment variable in five places in your application code in the following order until it's found: - process.env (start) - .env.$(NODE_ENV).local (where NODE_ENV can be any of development, production or test) - .env.local - .env.$(NODE_ENV) (where NODE_ENV can be any of development, production or test) - .env (end) So, if you define a variable in .env.development.local and then redefine it in env.development, the value in env.development.local will be used. If you've checked all these points and still have issues, it might be a problem with how you're trying to access the variables in your code. Make sure you're accessing them as process.env.YOUR_VARIABLE_NAME. For more details, you can refer to these sources: source 1 (https://refine.dev/blog/next-js-environment-variables#types-of-environment-variables-in-nextjs), source 2 (https://refine.dev/blog/next-js-environment-variables#environment-variable-load-order), source 3 (https://refine.dev/blog/next-js-environment-variables#how-to-use-environment-variables-in-nextjs), source 4 (https://refine.dev/blog/next-js-environment-variables#using-environment-variables-in-the-browser). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

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exotic-emerald•4mo ago

I also got this error if i didnt set the variable to as string @kapa.ai

exotic-emerald•4mo ago

any response? @kapa.ai

kapa.ai•4mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- I'm sorry, but I need more context to provide a helpful response. Could you please provide more details or clarify your question? ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

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exotic-emerald•4mo ago

@kapa.ai I got this

Argument of type 'string | undefined' is not assignable to parameter of type 'string'.
  Type 'undefined' is not assignable to type 'string'.ts(2345)

Argument of type 'string | undefined' is not assignable to parameter of type 'string'.
  Type 'undefined' is not assignable to type 'string'.ts(2345)

error when it's not set to

const SUPABASE_URL = process.env.SUPABASE_URL as string;
const SUPABASE_KEY = process.env.SUPABASE_KEY as string;

const SUPABASE_URL = process.env.SUPABASE_URL as string;
const SUPABASE_KEY = process.env.SUPABASE_KEY as string;

kapa.ai•4mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- The error message you're seeing is because TypeScript is strict about types and it doesn't allow a variable of type string | undefined to be assigned to a variable of type string. In your case, process.env.SUPABASE_URL and process.env.SUPABASE_KEY are potentially undefined because environment variables in Node.js are undefined if they are not set. You can solve this issue by providing a default value for these environment variables when they are undefined. Here's how you can do it:

const SUPABASE_URL = process.env.SUPABASE_URL ?? "";
const SUPABASE_KEY = process.env.SUPABASE_KEY ?? "";

const SUPABASE_URL = process.env.SUPABASE_URL ?? "";
const SUPABASE_KEY = process.env.SUPABASE_KEY ?? "";

In this code, if process.env.SUPABASE_URL or process.env.SUPABASE_KEY is undefined, an empty string will be used as a default value. This ensures that SUPABASE_URL and SUPABASE_KEY are always strings, which satisfies TypeScript's type system. However, please note that if these values are not set correctly in your environment variables, your application might not work as expected because it won't be able to connect to your Supabase instance. So, make sure to set these environment variables correctly in your .env.local file or in your hosting environment. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

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exotic-emerald•4mo ago

@kapa.ai I tried console logging the SUPABASE_URL const, and it returns undefined even tho I literally put a value inside .env.local file

kapa.ai•4mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- If your environment variables are not being read, it could be due to several reasons: 1. The .env.local file is not in the root directory of your project. 2. The environment variables in the .env.local file are not named correctly. They should match exactly with the ones you're trying to access in your code. 3. The application was not restarted after adding the environment variables. Environment variables are loaded when the application starts, so any changes to them require a restart of the application. 4. If you're using Next.js, remember that to expose a variable to the browser you need to prefix the variable with NEXT_PUBLIC_. So if you want to use SUPABASE_URL in the browser, you should rename it to NEXT_PUBLIC_SUPABASE_URL. If you've checked all these points and still have issues, it might be a problem with how you're trying to access the variables in your code. Make sure you're accessing them as process.env.YOUR_VARIABLE_NAME. For more details, you can refer to these sources: source 1 (https://refine.dev/blog/next-js-environment-variables#types-of-environment-variables-in-nextjs), source 2 (https://refine.dev/blog/next-js-environment-variables#environment-variable-load-order), source 3 (https://refine.dev/blog/next-js-environment-variables#how-to-use-environment-variables-in-nextjs), source 4 (https://refine.dev/blog/next-js-environment-variables#using-environment-variables-in-the-browser). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•4mo ago

<@452628900569415681> kapa.ai is still learning and improving, please let us know how it did by reacting below

exotic-emerald•4mo ago

@kapa.ai

kapa.ai•4mo ago

Let me check the knowledge base for you. One moment! :books: Sorry @Nas-damha, I seem to be having a bit of trouble. Don't worry though, I've pinged my support and they will try to fix me up! :technologist: Perhaps try again in 15mins?

exotic-emerald•4mo ago

@kapa.ai did all the above still got a

⨯ node_modules\@supabase\supabase-js\dist\module\SupabaseClient.js (43:18) @ new SupabaseClient
 ⨯ Error: supabaseKey is required.
    at eval (./src/utility/supabase-client.ts:9:89)
    at (ssr)/./src/utility/supabase-client.ts (C:\Users\user\Documents\Dev\lms-pondokit-be\.next\server\app\login\page.js:359:1)
    at __webpack_require__ (C:\Users\user\Documents\Dev\lms-pondokit-be\.next\server\webpack-runtime.js:33:42)
    at eval (./src/providers/auth-provider/auth-provider.ts:5:82)
    at (ssr)/./src/providers/auth-provider/auth-provider.ts (C:\Users\user\Documents\Dev\lms-pondokit-be\.next\server\app\login\page.js:326:1)
    at __webpack_require__ (C:\Users\user\Documents\Dev\lms-pondokit-be\.next\server\webpack-runtime.js:33:42)
    at JSON.parse (<anonymous>)
null

⨯ node_modules\@supabase\supabase-js\dist\module\SupabaseClient.js (43:18) @ new SupabaseClient
 ⨯ Error: supabaseKey is required.
    at eval (./src/utility/supabase-client.ts:9:89)
    at (ssr)/./src/utility/supabase-client.ts (C:\Users\user\Documents\Dev\lms-pondokit-be\.next\server\app\login\page.js:359:1)
    at __webpack_require__ (C:\Users\user\Documents\Dev\lms-pondokit-be\.next\server\webpack-runtime.js:33:42)
    at eval (./src/providers/auth-provider/auth-provider.ts:5:82)
    at (ssr)/./src/providers/auth-provider/auth-provider.ts (C:\Users\user\Documents\Dev\lms-pondokit-be\.next\server\app\login\page.js:326:1)
    at __webpack_require__ (C:\Users\user\Documents\Dev\lms-pondokit-be\.next\server\webpack-runtime.js:33:42)
    at JSON.parse (<anonymous>)
null

error