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•2mo ago

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wise-white•2mo ago

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

wise-white•2mo ago

any response? @kapa.ai

kapa.ai•2mo 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•2mo ago

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wise-white•2mo 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•2mo 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•2mo ago

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wise-white•2mo 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•2mo 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•2mo ago

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wise-white•2mo ago

@kapa.ai

kapa.ai•2mo 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?

wise-white•2mo 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

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- The error message Error: supabaseKey is required indicates that the Supabase key is not being provided when creating the Supabase client. This could be due to the environment variable SUPABASE_KEY not being set correctly or not being accessible where it's being used. Here are a few things you can check: 1. Ensure that the SUPABASE_KEY is correctly set in your .env.local file and that the file is located in the root directory of your project. 2. If you're using Next.js, remember that environment variables are only available on the server side by default. If you're trying to access SUPABASE_KEY on the client side, you need to prefix it with NEXT_PUBLIC_ in your .env.local file. So, it should be NEXT_PUBLIC_SUPABASE_KEY. 3. Make sure to restart your development server after making changes to your .env.local file. Environment variables are loaded when the server starts, so any changes won't take effect until the server is restarted. 4. If you're still having issues, you can try logging process.env to see all the environment variables that are currently set and check if SUPABASE_KEY or NEXT_PUBLIC_SUPABASE_KEY is among them. If you've checked all these points and you're still seeing the error, it might be a problem with how you're creating the Supabase client. Make sure you're doing it like this:

import { createClient } from "@supabase/supabase-js";

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

export const supabaseClient = createClient(SUPABASE_URL, SUPABASE_KEY);

import { createClient } from "@supabase/supabase-js";

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

export const supabaseClient = createClient(SUPABASE_URL, SUPABASE_KEY);

This code will create a new Supabase client using the Supabase URL and key from your environment variables. If either of these variables is undefined, an empty string will be used as a default value. However, this will likely result in a different error because the Supabase client won't be able to connect to your Supabase instance without the correct URL and key. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

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wise-white•2mo ago

@kapa.ai

kapa.ai•2mo ago

wise-white•2mo ago

@kapa.ai

console.log(process.env);

console.log(process.env);

return an empty object

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- If console.log(process.env) is returning an empty object, it means that your environment variables are not being loaded correctly. Here are a few things you can check: 1. Make sure your .env.local file is in the root directory of your project. 2. Ensure the environment variables in your .env.local file are correctly named and formatted. They should be in the format VARIABLE_NAME=value, one per line. 3. If you're using Next.js, remember that environment variables are only available on the server side by default. If you're trying to access them on the client side, you need to prefix them with NEXT_PUBLIC_. 4. Make sure to restart your development server after making changes to your .env.local file. Environment variables are loaded when the server starts, so any changes won't take effect until the server is restarted. If you've checked all these points and you're still seeing an empty object, it might be a problem with your project configuration. You might want to check your Next.js or Node.js configuration to make sure it's set up to load environment variables correctly. 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•2mo ago

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wise-white•2mo ago

@kapa.ai it is in root directory, it's above the .eslintrc config file

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- If your .env.local file is in the root directory and you've followed the correct format for defining environment variables, but you're still unable to access them, it could be due to how your project is configured or how you're trying to access the variables. Here are a few more things you can check: 1. Make sure you're not trying to access the environment variables before they're loaded. If you're using a package like dotenv, you need to configure it at the top of your file before any other code. 2. If you're using Next.js, remember that environment variables are only available on the server side by default. If you're trying to access them on the client side, you need to prefix them with NEXT_PUBLIC_. 3. Check your project's configuration files (like next.config.js for Next.js projects) to make sure they're not interfering with how environment variables are loaded. 4. If you're using a version control system like Git, make sure your .env.local file is not ignored. Next.js ignores .env.local during the build step when it's inside .gitignore. 5. If you're deploying your application, make sure the environment variables are also set in your hosting environment. If you've checked all these points and you're still having issues, it might be a problem specific to your project or development environment. In that case, you might want to seek help from a community specific to your tech stack or from someone who can look at your project directly. 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•2mo ago

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wise-white•2mo ago

@kapa.ai where do I make sure dotenv works?

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- To ensure that dotenv is working correctly, you need to configure it at the top of your main server file (like server.js or index.js) before any other code. Here's how you can do it:

require('dotenv').config();

require('dotenv').config();

This line of code loads the environment variables from your .env file into process.env. If you're using ES6 modules, you can do it like this:

import dotenv from 'dotenv';
dotenv.config();

import dotenv from 'dotenv';
dotenv.config();

After this, you should be able to access your environment variables like process.env.YOUR_VARIABLE_NAME in your code. Remember to install the dotenv package in your project using npm or yarn:

npm install dotenv

npm install dotenv

yarn add dotenv

yarn add dotenv

Also, make sure your .env file is in the root directory of your project and it's not included in your .gitignore file. The .env file should not be committed to version control as it often contains sensitive information. For more details, you can refer to the dotenv package documentation (https://www.npmjs.com/package/dotenv). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

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wise-white•2mo ago

@kapa.ai how do I configure it in refinejs? I thought next js already have it configured?

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- You're correct. Next.js has built-in support for loading environment variables from .env.local during both development and production builds, so you don't need to use dotenv in a Next.js project. To use environment variables in Next.js, you should: 1. Create a .env.local file in the root of your project. 2. Add your environment variables in this file. They should be in the format VARIABLE_NAME=value, one per line. 3. Restart your development server. Next.js will load the variables when the server starts. 4. Access the variables in your code using process.env.VARIABLE_NAME. Remember that by default, environment variables are only available on the server side in Next.js. If you want to use them on the client side, you need to prefix them with NEXT_PUBLIC_. If you're still having issues, it might be a problem specific to your project or development environment. In that case, you might want to seek help from a community specific to your tech stack or from someone who can look at your project directly. 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•2mo ago

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wise-white•2mo ago

@kapa.ai can I request human feedback on this, cause we're just going in circles

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- I'm sorry to hear that you're having trouble with environment variables in your Next.js and Refine project. It can be frustrating when things don't work as expected. Given the information you've provided and the sources available, I've suggested all the common solutions to this issue. If you're still having problems, it might be due to a specific configuration or issue in your project that's not covered in the sources. At this point, I would recommend seeking help from a community specific to your tech stack, such as the Next.js GitHub Discussions (https://github.com/vercel/next.js/discussions) or the Refine Discord server (https://discord.com/channels/837692625737613362/1177266857548460062). You can share your project configuration and the exact steps you've taken, and someone might be able to spot what's going wrong. Remember to not share any sensitive information like secret keys or passwords when asking for help. If your issue involves sensitive environment variables, make sure to replace them with placeholders in your code snippets. ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ----------------------

kapa.ai•2mo ago

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