Bo Posts - Answer Overflow

•Created by Bo on 3/27/2025 in #questions

How to use reject correctly?

Hi I want to validate input file in a form. It can be either a single file or an array of files, if it is a single file then validate its maximum size, if it is an array of files then validate their total size. I want a custom message, actual. With this code I get an exception.

"files[]?": type("File | File[] < 6").narrow((data, ctx) => {
    const MAX_SIZE = 4 * 1024 * 1024;

     if (Array.isArray(data)) {
    const totalSize = data.reduce((sum, file) => sum + file.size, 0);
    if (totalSize > MAX_SIZE) {
      return ctx.reject({
        message: `Total files size should be less than 4MB (actual: ${(totalSize/1024/1024).toFixed(2)}MB)`,
        actual: `${data.length} files, ${totalSize} bytes total`,
      });
    }
    return true;
  }
  
  if (data.size > MAX_SIZE) {
    return ctx.reject({
      message: "File size should be less than 4MB",
      actual: `${(data.size/1024/1024).toFixed(2)}MB`,
    });
  }
  
  return true;
  }),

"files[]?": type("File | File[] < 6").narrow((data, ctx) => {
    const MAX_SIZE = 4 * 1024 * 1024;

     if (Array.isArray(data)) {
    const totalSize = data.reduce((sum, file) => sum + file.size, 0);
    if (totalSize > MAX_SIZE) {
      return ctx.reject({
        message: `Total files size should be less than 4MB (actual: ${(totalSize/1024/1024).toFixed(2)}MB)`,
        actual: `${data.length} files, ${totalSize} bytes total`,
      });
    }
    return true;
  }
  
  if (data.size > MAX_SIZE) {
    return ctx.reject({
      message: "File size should be less than 4MB",
      actual: `${(data.size/1024/1024).toFixed(2)}MB`,
    });
  }
  
  return true;
  }),

TypeError: Cannot read properties of undefined (reading 'name')
    at Object.description (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/predicate.js:23:67)
    at implementation.defaults.expected (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/shared/implement.js:107:39)
    at get expected [as expected] (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/shared/errors.js:63:47)
    at eval (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/roots/union.js:89:101)
    at Array.forEach (<anonymous>)
    at eval (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/roots/union.js:86:24)
    at Array.map (<anonymous>)
    at expected (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/roots/union.js:84:61)
...

TypeError: Cannot read properties of undefined (reading 'name')
    at Object.description (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/predicate.js:23:67)
    at implementation.defaults.expected (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/shared/implement.js:107:39)
    at get expected [as expected] (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/shared/errors.js:63:47)
    at eval (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/roots/union.js:89:101)
    at Array.forEach (<anonymous>)
    at eval (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/roots/union.js:86:24)
    at Array.map (<anonymous>)
    at expected (webpack-internal:///(rsc)/../../node_modules/@ark/schema/out/roots/union.js:84:61)
...

19 replies

Aarktype

•Created by Bo on 3/18/2025 in #questions

Easy format errors like in Zod?

Hi, I can't find any errors formatting like in zod. https://zod.dev/ERROR_HANDLING?id=formatting-errors. I'm doing it manually now, maybe I'm missing something?)

23 replies

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