codesnips
python 
from django.conf import settings
from django.db.models.signals import post_save
from django.dispatch import receiver

from .models import EmailOutbox

Sending Welcome Emails via a Django post_save Signal and Outbox Worker

django signals email
by codesnips 4 tabs
go 
package config

import (
	"fmt"
	"os"
	"strconv"

Load Go Configuration From Environment Variables With Typed Defaults

go configuration environment-variables
by codesnips 3 tabs
python 
import hashlib
from datetime import datetime, timezone

from sqlalchemy import BigInteger, Column, DateTime, String, UniqueConstraint
from sqlalchemy.orm import declarative_base

Efficient Bulk Insert in SQLAlchemy with a Reusable Chunking Helper

sqlalchemy postgres bulk-insert
by codesnips 3 tabs
rust 
use sqlx::PgPool;
use std::time::Duration;
use tokio::sync::mpsc;

#[derive(Debug, Clone)]
pub struct MetricPoint {

Batching Database Writes in Rust with a Size- and Interval-Triggered Flush Buffer

rust tokio sqlx
by codesnips 3 tabs
php 
<?php

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

Slugify Post Titles on Save With a Laravel Model Observer and Guaranteed Uniqueness

laravel eloquent observer
by codesnips 4 tabs
go 
package bank

import "errors"

var ErrVersionConflict = errors.New("optimistic lock: version conflict")
var ErrInsufficientFunds = errors.New("insufficient funds")

Optimistic Locking in Go With a Version Column on UPDATE

optimistic-locking concurrency postgres
by codesnips 3 tabs
rust 
use std::fmt;
use std::hash::{Hash, Hasher};
use std::marker::PhantomData;
use uuid::Uuid;

pub struct Id<T> {

Type-Safe Entity IDs in Rust with a Zero-Cost Id<T> Newtype

rust newtype type-safety
by codesnips 3 tabs
php 
<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;
use Illuminate\Database\Eloquent\Builder;

Comment Moderation Queue With Pending Scope and Approval Action in Laravel

laravel eloquent moderation
by codesnips 3 tabs
python 
import queue
import time
from dataclasses import dataclass, field, replace
from typing import Any, Dict, Tuple

In-Process Threaded Background Job Queue for Sending Emails Without Redis

background-jobs threading queue
by codesnips 4 tabs
erb 
<%= form_with url: bulk_update_orders_path, method: :patch, data: { turbo_confirm: "Update selected orders?" } do %>
  <div class="batch-toolbar">
    <%= select_tag :status,
          options_for_select(Order.statuses.keys.map { |s| [s.humanize, s] }),
          prompt: "Set status to\u2026" %>
    <%= submit_tag "Apply to selected", class: "btn" %>

Bulk-Updating Order Statuses with a Checkbox Collection and update_all Batch Action in Rails

rails activerecord update-all
by codesnips 3 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
rust 
use std::time::Duration;
use rand::Rng;

#[derive(Clone, Debug)]
pub struct BackoffPolicy {
    pub base_delay: Duration,

Exponential Backoff With Jitter for Retrying Fallible Async Operations in Rust

rust tokio async
by codesnips 3 tabs