codesnips

validation

java 
package com.example.catalog.web;

import com.example.catalog.domain.Product;
import java.math.BigDecimal;

public record ProductResponse(

Paginated Product Search Endpoint with Spring Data JPA Specifications

spring-boot spring-data-jpa pagination
by codesnips 4 tabs
typescript 
import { z } from 'zod';

export const signupSchema = z
  .object({
    email: z.string().min(1, 'Email is required').email('Enter a valid email'),
    username: z

Field-Level Signup Validation with Zod and a Typed useZodForm Hook

react zod forms
by codesnips 3 tabs
go 
package api

import "strings"

type Issue struct {
  Field   string `json:"field"`

JSON schema-ish validation with custom error details

go api json
by Leah Thompson 1 tab
ruby 
class AddressForm
  include ActiveModel::Model
  include ActiveModel::Attributes

  attribute :line1, :string
  attribute :line2, :string

Rails Nested Address Form Object With Aggregated ActiveModel Errors

rails activemodel form-object
by codesnips 3 tabs
javascript 
const MAX_LIMIT = 100;
const DEFAULT_LIMIT = 20;
const ALLOWED_ORDER = new Set(['asc', 'desc']);

function decodeCursor(raw) {
  const json = Buffer.from(raw, 'base64').toString('utf8');

Cursor-Based Pagination in Express With Query-Parsing Middleware

express pagination cursor-pagination
by codesnips 3 tabs
ruby 
class CommentsController < ApplicationController
  before_action :set_post

  def new
    @comment = @post.comments.build
  end

Turbo Stream form errors: replace only the form frame

rails turbo hotwire
by codesnips 4 tabs
rust 
use serde::{Deserialize, Deserializer};

#[derive(Debug, Deserialize)]
pub struct ListFilter {
    #[serde(default)]
    pub status: Status,

Parse URL Query Strings into a Typed Filter Struct with Defaults in Rust

rust serde query-string
by codesnips 3 tabs
python 
import torch

best_val_loss = float('inf')

for epoch in range(1, num_epochs + 1):
    model.train()

A clean PyTorch training loop with validation and checkpoints

pytorch training-loop checkpoints
by Dr. Elena Vasquez 1 tab
javascript 
const multer = require('multer');

const ALLOWED_MIME = new Set(['image/jpeg', 'image/png', 'image/webp']);

function fileFilter(req, file, cb) {
  if (!ALLOWED_MIME.has(file.mimetype)) {

Upload and Resize User Avatars with Multer and Sharp in Express

express multer sharp
by codesnips 3 tabs
python 
import great_expectations as gx

context = gx.get_context()
data_source = context.data_sources.add_pandas(name='training_data')
asset = data_source.add_dataframe_asset(name='churn_asset')
batch_definition = asset.add_batch_definition_whole_dataframe('full_dataframe')

Great Expectations checks for dataset health before retraining

great-expectations data-quality mlops
by Dr. Elena Vasquez 1 tab
typescript 
import { Injectable } from '@angular/core';
import { FormBuilder, FormGroup, Validators } from '@angular/forms';

@Injectable()
export class SignupFormService {
  readonly form: FormGroup;

Multi-Step Signup Wizard in Angular with a Shared FormGroup and Stepper Service

angular reactive-forms wizard
by codesnips 4 tabs
python 
import enum
import datetime as dt

from sqlalchemy import Column, Integer, String, BigInteger, Enum, DateTime
from sqlalchemy.orm import declarative_base

Streaming FastAPI File Uploads with a Background Validation Task

fastapi uploads background-tasks
by codesnips 3 tabs