codesnips

validation

typescript 
import { useForm } from 'react-hook-form'
import { useState } from 'react'
import api from '@/services/api'

interface SignupFormData {
  email: string

React Hook Form with async validation

react forms validation
by Maya Patel 1 tab
ruby 
class AttachmentContentTypeValidator < ActiveModel::EachValidator
  SIGNATURES = {
    "image/png"       => ["\x89PNG\r\n\x1a\n".b],
    "image/jpeg"      => ["\xFF\xD8\xFF".b],
    "image/gif"       => ["GIF87a".b, "GIF89a".b],
    "application/pdf" => ["%PDF-".b]

Safer File Attachments: Content Type + Size Validation

rails security active-storage
by codesnips 4 tabs
typescript 
import { NestFactory } from '@nestjs/core';
import { ValidationPipe } from '@nestjs/common';
import { AppModule } from './app.module';

async function bootstrap() {
  const app = await NestFactory.create(AppModule);

Global ValidationPipe with class-validator DTOs and Transform in NestJS

nestjs validation dto
by codesnips 3 tabs
php 
<?php

use Illuminate\Database\Migrations\Migration;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Support\Facades\Schema;

Syncing Article Tags Through a Many-to-Many Pivot in Laravel

laravel eloquent many-to-many
by codesnips 4 tabs
javascript 
class ApiError extends Error {
  constructor(statusCode, message, code) {
    super(message);
    this.name = 'ApiError';
    this.statusCode = statusCode;
    this.code = code || null;

Centralized Async Error Handling in Express With asyncHandler and Error Middleware

express nodejs error-handling
by codesnips 4 tabs
rust 
use serde::{Deserialize, Serialize};

#[derive(Debug, Deserialize)]
pub struct SignupRequest {
    pub email: String,
    pub password: String,

Accumulating Field-Level Validation Errors in Rust Signup Forms

rust validation error-handling
by codesnips 3 tabs
javascript 
const express = require('express');
const multer = require('multer');
const os = require('os');
const fs = require('fs/promises');
const { parseCsvStream } = require('./csvStreamParser');

Stream and Validate Large CSV Uploads Row-by-Row with Node Streams and Backpressure

nodejs streams csv
by codesnips 3 tabs
typescript 
import { z } from "zod";

const coerceNumber = z.preprocess((v) => {
  if (v === "" || v === undefined) return undefined;
  if (typeof v !== "string") return v;
  const n = Number(v);

API input coercion for query params (Zod preprocess)

typescript validation api
by codesnips 3 tabs
python 
from django import forms
from .models import Event


class EventForm(forms.ModelForm):
    class Meta:

Django form validation with clean methods

django python forms
by Priya Sharma 1 tab
javascript 
import { Controller } from "@hotwired/stimulus"

export default class extends Controller {
  static targets = ["field"]

  validateField(event) {

Form validation with Stimulus and server-side errors

stimulus forms validation
by Jordan Lee 2 tabs