Search Results for "activerecord-queries"

Lessons

Parallel ActiveRecord Queries with load_async in Rails 7

Nov 11, 2021 Pro

Complex queries can slow your page rendering down. We can now run long queries in parallel with Rails 7's load_async method in ActiveRecord to speed up page rendering.

Exploring PostgreSQL Tuples Rails PR

Rails tracks the row count and affected rows for queries made with ActiveRecord. A recent PR makes a tiny, but important change to the PostgreSQL adapter to make the row count significantly more efficient.

Strict Loading with ActiveRecord

Oct 16, 2023 Pro

Not eager loading in your Rails applications can have series performance side effects. Rails now comes with a strict_loading feature that you can use to make sure that queries are run in an efficient manner.

18m

Charts with Chartkick and Groupdate

Jun 19, 2017

Add various types of charts to your Rails app with Chartkick and use Groupdate to make easy group queries in SQL

10m

ActiveRecord Explain

Feb 16, 2017

Learn how to use ActiveRecord Explain to analyze your SQL queries generated by ActiveRecord

Sorting Blog Posts With Scopes

Apr 03, 2023

Scopes are a way for us to change the way a database table is queried. For example, we can use them to change the ordering of the results so certain records are first.

ActiveRecord in_order_of

Mar 23, 2026

Learn how to order records by a column with a set of values

Normalize All ActiveRecord Attributes

Feb 18, 2026

Learn how to normalize all ActiveRecord attributes with a quick peak at the Rails source code.

Domain Expiring Soon Emails

Dec 24, 2025 Pro

Emails for domains that are expiring soon require a bit of a different approach since we can't rely on ActiveRecord callbacks. Instead, we'll use a recurring task (like a cron job) to check on them and notify users.

12m

Testing The Domain Model

Dec 22, 2025 Pro

Let's write some tests to ensure that our logic is correct for the Domain model.

Email Notifications For Domain Expirations

Dec 19, 2025 Pro

Emails will be a critical feature to notify users when domains expire and become available for purchase. Let's add these using ActiveRecord callbacks.

Sorting Domains

Dec 17, 2025 Pro

For users with many domains, sorting is going to be a really useful feature. Let's add links to the table column headers for sorting by name, expiration or last checked at.

15m

Syncing Domain Expiration

Dec 03, 2025 Pro

Now that users can manage domains, let's integrate our key feature: syncing domain expiration with RDAP.

Adding the Domains model

Dec 01, 2025 Pro

Next, we need to track domains and associate them with users in the database.

13m

How to add Lazy Load Hooks to Rails Plugins

May 05, 2025

To provide clean integrations with Rails plugins, we can use lazy load hooks to add callbacks for when classes are loaded.

20m

How to Configure Multiple Databases with Rails

Oct 21, 2024

Rails 8 now ships with multiple databases by default. In this lesson, we'll learn how the configuration works and how to deploy to production with environment variables

17m

Defer Job Enqueues After Transaction Commit in Rails 7.2

Aug 14, 2024

Enqueuing jobs inside of a database transaction is a common mistake that's now handled for you automatically in Rails 7.2

10m

Automatic Transcriptions Database Model

Mar 25, 2024 Pro

To start off our automated transcription series, we'll start by creating our database model for

13m

ActiveRecord Aggregations with composed_of

Mar 18, 2024 Pro

ActiveRecord Aggregations let you use composed_of to combine columns into a single attribute using a Ruby object.

14m

Storing Web Scraper Results in ActiveRecord models

Feb 27, 2024 Pro

We need to keep track of the web pages we want to monitor and scrape data from, so let's create our ActiveRecord model for storing this information and a Result model for storing the result each time we scrape a web page.