Local file access in Query

Is it possible to read a local file in a query implementation defined in operations.ts ?

14 Replies

Hi @Jorge. I'm kapa.ai, your friendly support bot. I will try to answer your question by searching through the knowledge base. :wave: ---------------------- Hmm, I don't know enough to give you a confident answer yet. The knowledge sources provided do not contain specific information about reading a local file in operations.ts in the context of Wasp. However, in general, Node.js allows reading local files using the fs module. For more specific information about Wasp, I recommend checking out the Wasp documentation (https://wasp-lang.dev/docs). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @Jorge, 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?

JorgeOP•2mo ago

@kapa.ai refresh

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- In the context of Wasp, if you're referring to refreshing or updating your application after making changes, you can do so by rebuilding your app and redeploying it. Here are the steps as outlined in the Wasp documentation (https://wasp-lang.dev/docs/advanced/deployment/manually#updates--redeploying): 1. Run wasp build to rebuild your app. 2. Run railway up in the .wasp/build directory (server). 3. Repeat all the steps in the .wasp/build/web-app directory (client). If you're referring to refreshing or updating the Wasp CLI, there's an open issue on GitHub discussing the need for a more user-friendly update process. Currently, the way to update Wasp is to run the installer again with curl -sSL <https://get.wasp-lang.dev/installer.sh> | sh. If you already have Wasp installed, it will tell you to run it a bit differently to overwrite those files. The team is considering adding a wasp update command to make this process easier. You can follow the progress on this issue here (https://github.com/wasp-lang/wasp/issues/616). Please let me know if you were referring to a different kind of "refresh"! ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @Jorge, 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?

MEE6•2mo ago

Wohooo @Jorge, you just became a Waspeteer level 3!

JorgeOP•2mo ago

@kapa.ai Is it possible to read a local file in a query implementation defined in operations.ts ?

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- Based on the provided knowledge sources, there is no explicit information about reading a local file in a query implementation defined in operations.ts in the context of Wasp. However, since Wasp uses Node.js for server-side operations, you should be able to use Node.js's built-in fs (File System) module to read local files. Here's a basic example:

const fs = require('fs');

fs.readFile('/path/to/your/file', 'utf8', (err, data) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(data);
});

const fs = require('fs');

fs.readFile('/path/to/your/file', 'utf8', (err, data) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(data);
});

Please note that this is a general Node.js example and not specific to Wasp. Always ensure that your operations align with the best practices and guidelines provided in the Wasp documentation (https://wasp-lang.dev/docs). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @Jorge, 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?

JorgeOP•2mo ago

@kapa.ai what's the recommended location for files in the project?

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- The recommended location for files in a Wasp project is as follows: - main.wasp: This is where your Wasp code goes. It's the main configuration file for your app. - package.json: This file contains your dependencies and project information. - public: This directory is for your static files, such as images and favicons. - src: This is where your source code (TypeScript, JavaScript, CSS, HTML) goes. For example, Main.css, MainPage.jsx, vite-env.d.ts, and waspLogo.png are located here. Here's a basic structure of a Wasp project:

.  
├── .gitignore  
├── main.wasp  
├── package.json  
├── package-lock.json  
├── public  
├── src  
│   ├── Main.css  
│   ├── MainPage.jsx  
│   ├── vite-env.d.ts  
│   └── waspLogo.png  
├── tsconfig.json  
├── vite.config.ts  
├── .waspignore  
└── .wasproot

.  
├── .gitignore  
├── main.wasp  
├── package.json  
├── package-lock.json  
├── public  
├── src  
│   ├── Main.css  
│   ├── MainPage.jsx  
│   ├── vite-env.d.ts  
│   └── waspLogo.png  
├── tsconfig.json  
├── vite.config.ts  
├── .waspignore  
└── .wasproot

In Wasp 0.12.0, the structure was updated, and the separation of server/client code is no longer necessary. You can now organize your code however you want, as long as it's inside the src directory. All external imports in your Wasp file must have paths starting with @src (e.g., import foo from '@src/bar.js'), where @src refers to the src directory in your project root. For more details, you can refer to the Wasp documentation on project structure (https://wasp-lang.dev/docs/tutorial/project-structure). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @Jorge, 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?

JorgeOP•2mo ago

@kapa.ai I tried you snippet: [ Server!] [Error: ENOENT: no such file or directory, open '/public/data/test.jsonl'] { [ Server!] errno: -2, [ Server!] code: 'ENOENT', [ Server!] syscall: 'open', [ Server!] path: '/public/data/test.jsonl' [ Server!] }

kapa.ai•2mo ago

Let me check the knowledge base for you. One moment! :books: ---------------------- The error message ENOENT: no such file or directory, open '/public/data/test.jsonl' indicates that Node.js is unable to find the file at the specified path. In Node.js, paths starting with / are absolute paths. So, /public/data/test.jsonl is referring to a file located in a public directory at the root of your file system, not your project. If test.jsonl is located in the public directory of your Wasp project, you should use a relative path to access it. Here's how you can modify the file reading operation:

const fs = require('fs');
const path = require('path');

// __dirname is the directory of the current module file.
// path.join() is used to create a path string that works on any OS.
const filePath = path.join(__dirname, 'public', 'data', 'test.jsonl');

fs.readFile(filePath, 'utf8', (err, data) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(data);
});

const fs = require('fs');
const path = require('path');

// __dirname is the directory of the current module file.
// path.join() is used to create a path string that works on any OS.
const filePath = path.join(__dirname, 'public', 'data', 'test.jsonl');

fs.readFile(filePath, 'utf8', (err, data) => {
  if (err) {
    console.error(err);
    return;
  }
  console.log(data);
});

This code will look for test.jsonl in the public/data directory of your project. If the file is located in a different directory, adjust the arguments to path.join() accordingly. Please note that this is a general Node.js example and not specific to Wasp. Always ensure that your operations align with the best practices and guidelines provided in the Wasp documentation (https://wasp-lang.dev/docs). ---------------------- Note: you can ask me a follow up question by @ mentioning me again :speech_balloon: ---------------------- Sorry @Jorge, 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?

JorgeOP•2mo ago

Did not find better but this seems to work: import * as fs from 'fs'; import * as path from 'path'; import { fileURLToPath } from 'url'; const dirname = path.dirname(fileURLToPath(import.meta.url)); const filePath = path.join(dirname, '..', '..', 'web-app', 'public', 'data', 'test.jsonl'); fs.readFile(filePath, 'utf8', (err, data) => { if (err) { console.error('Error reading file:', err); return; } console.log(data); });

martinsos•2mo ago

@Jorge check this out https://github.com/wasp-lang/wasp/issues/1564

GitHub

Explain in docs how to import JSON files / read static files in Was...

Right now it is a bit tricky because you can directly import .json with node (at least 18), and people get surprised with it because error message is confusing (claims there is no file). I explaine...

JorgeOP•2mo ago

@martinsos Interesting thanks, but in my case it's not exactly a json file. Fortunately, I've found another workaround 🙂

martinsos•2mo ago

Exactly, so you would follow the secon things I suggseted there:

If you want to have the file as "static asset", and read it with readFile -> I am sure you could do that, you just need to provide correct path. I don't think this is Wasp specific though -> so you would figure out how to determine the correct path from the node file, or maybe you know where you put the file in some other way, ... .

The important thing is making sure that your file gets shipped together with the server and tha tyou correctly resolve the path to it, both durign development and in production.

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Local file access in Query