validation

import io
import os
from uuid import uuid4
from PIL import Image, UnidentifiedImageError

ALLOWED_FORMATS = {"JPEG", "PNG", "WEBP"}

export const required = (msg = 'This field is required') => (value) =>
  value && value.trim() !== '' ? '' : msg;

export const minLength = (n, msg) => (value) =>
  value && value.length >= n ? '' : msg || `Must be at least ${n} characters`;

@Entity
@Table(name = "stored_files")
public class StoredFile {

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)

<?php

namespace App\Rules;

use Closure;
use Illuminate\Contracts\Validation\ValidationRule;

export const initialState = (steps, initialData = {}) => ({
  steps,
  stepIndex: 0,
  data: initialData,
  errors: {},
});

export const wizardMachine = {
  initial: 'account',
  states: {
    account: {
      next: 'profile',
      canLeave: (data) => Boolean(data.email && data.password),

package com.example.api.error;

import com.fasterxml.jackson.annotation.JsonInclude;

import java.time.Instant;
import java.util.List;

<h1>Create your account</h1>

<%= render "error_summary", record: @user %>

<%= form_with model: @user, url: signups_path do |f| %>
  <div class="field">

import { z } from "zod";

export const rowSchema = z.object({
  email: z.string().email(),
  name: z.string().min(1, "name is required"),
  age: z.coerce.number().int().min(0, "age must be >= 0"),

class ArticlesController < ApplicationController
  before_action :set_article, only: %i[edit update]

  def new
    @article = Article.new
  end

<?php

namespace App\Http\Requests;

use Illuminate\Contracts\Validation\Validator;
use Illuminate\Foundation\Http\FormRequest;

@RestController
@RequestMapping("/api/customers")
public class CsvImportController {

    private final CsvImportService importService;