codesnips

migrations

php 
<?php

use App\Http\Controllers\DocumentsController;
use Illuminate\Support\Facades\Route;

Route::middleware('auth')->group(function () {

Soft Deletes with a Trash View and Restore Route in Laravel

laravel eloquent soft-deletes
by codesnips 4 tabs
ruby 
class CreateAuditLogs < ActiveRecord::Migration[7.1]
  def change
    create_table :audit_logs do |t|
      t.references :auditable, polymorphic: true, null: false
      t.references :user, null: true, foreign_key: true
      t.string :action, null: false

Rails Audit Log for Model Changes Using ActiveRecord Callbacks

rails activerecord callbacks
by codesnips 4 tabs
python 
from django.db import models
from django.utils.text import slugify


class Article(models.Model):
    title = models.CharField(max_length=200)

Auto-Generate Unique Slugs in Django with a pre_save Signal and Model Method

django signals slugs
by codesnips 3 tabs
ruby 
class CreateCustomerRevenueSummaries < ActiveRecord::Migration[7.0]
  def change
    create_view :customer_revenue_summaries, materialized: true, version: 1

    add_index :customer_revenue_summaries,
              :customer_id,

Database Views for Read Models

rails postgres performance
by codesnips 4 tabs
sql 
CREATE TABLE subscriptions (
    id                  BIGGENERATED ALWAYS AS IDENTITY PRIMARY KEY,
    customer_id         BIGINT       NOT NULL,
    plan_code           TEXT         NOT NULL,
    status              TEXT         NOT NULL DEFAULT 'active',
    current_period_end  TIMESTAMPTZ  NOT NULL,

Partial index for “active” rows in Postgres

postgres performance sql
by codesnips 3 tabs
sql 
-- Step 1: add the column nullable, no default.
-- Catalog-only change in Postgres 11+, returns instantly.
ALTER TABLE orders
  ADD COLUMN currency text;

-- Optional: keep the lock attempt bounded so a long-running

SQL migration safety: add column nullable, backfill, then constrain

postgres migrations reliability
by codesnips 3 tabs
php 
<?php

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

Generating URL Slugs from Titles with a Laravel Model Observer

laravel eloquent observers
by codesnips 4 tabs
python 
from django.db import models
from django.utils import timezone


class SoftDeleteQuerySet(models.QuerySet):
    def delete(self):

Soft-Delete in Django with a Custom Manager and QuerySet

django orm soft-delete
by codesnips 3 tabs
php 
<?php

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

Soft-Delete and Restore Blog Posts with a Trash View in Laravel

laravel eloquent soft-deletes
by codesnips 4 tabs
python 
from alembic import op
import sqlalchemy as sa

revision = "20240612_add_status"
down_revision = "20240515_create_orders"
branch_labels = None

Zero-Downtime NOT NULL Column Backfill with Alembic and SQLAlchemy

alembic sqlalchemy migrations
by codesnips 2 tabs
ruby 
class CreateReservations < ActiveRecord::Migration[7.1]
  def up
    enable_extension "btree_gist" unless extension_enabled?("btree_gist")

    create_table :reservations do |t|
      t.references :room, null: false, foreign_key: true

DB-Level “no overlapping ranges” with exclusion constraint

rails postgres exclusion-constraint
by codesnips 3 tabs
ruby 
class AddSlugToPosts < ActiveRecord::Migration[7.1]
  def change
    add_column :posts, :slug, :string, null: false
    add_index :posts, :slug, unique: true
  end
end

Database-Backed Unique Slugs with Retry

rails postgres slugs
by codesnips 4 tabs