Search Results for "data-structure-ruby"

Lessons

Ruby Pattern Matching

Aug 18, 2025

In this episode, we will be looking at pattern matching in Ruby which lets you check the structure of data and save parts of it into variables.

3

HTML Learning Path - Form Parameter Naming Conventions In Rails

Nov 02, 2023

In this lesson, we will step briefly into the world of forms in Rails to see the naming conventions Rails uses to help us get structured data from form submissions in our Rails applications.

3

Generating the Models

May 11, 2026 Pro

Let's get this budget tracking generated and generate our Budget and Transaction models and setup nested routes, seed data, form customization, enum setup, and basic CRUD with proper redirects.

2

Ruby Data Class

Aug 11, 2025 Pro

In this episode, we will look at Ruby's Data class which provides a way to define simple classes for value-alike objects.

3

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.

0

Single Table Inheritance (STI) with ActiveRecord in Rails

Jan 22, 2024

Have models that store the same data but need different functionality? Rails provides Single Table Inheritance in ActiveRecord to solve this problem.

10

Normalizes method in ActiveRecord

Sep 18, 2023

Normalizing data has always been a pain in Rails, but not anymore! Instead of callbacks or overriding setters, Rails 7.1 introduces "normalizes" to make normalizing data easy.

5

Virtual Generated Columns in Rails with ActiveRecord

Sep 06, 2023 Pro

Rails' ActiveRecord supports virtual generated columns in the database. For example, you can use these for converting numbers like degrees Celsius to Fahrenheit. These columns are saved with the regular table data and allows you to query against them.

5

SQL Learning Path - Update Delete Statements

Apr 01, 2023

In this lesson, we will look at how to update the data and delete rows of data from our database tables.

0

SQL Learning Path - String Functions

Apr 01, 2023

In this lesson, we will look at how to manipulate string data returned from our queries.

0

SQL Learning Path - Calculations with Columns

Apr 01, 2023

In this lesson, we will look at how to perform calculations on the data we retrieve from columns in our database tables.

1

SQL Learning Path - Select Statement

Apr 01, 2023

In this lesson, we will look at how to select rows of data from our database tables.

0

SQL Learning Path - Insert Statement

Apr 01, 2023

In this lesson, we will look at how to insert data into our database table.

0

Designing Database Models for a Password Manager

May 30, 2023 Pro

Our first step in building any application is designing what database models we will need to store our data.

4

Creating New Blog Posts

Apr 03, 2023

Handling form submissions with Rails teaches us about strong parameters and saving data with our Rails models into the database.

2

Adding a New Blog Post Action

Apr 03, 2023

We now want to create new Blog Posts in our Rails app, not directly in the database. To do this, we're going to start by building a new action and form for inputting data for our Rails model.

10

Air Quality Monitoring with Ruby, a Raspberry PI & PMS5003 Sensor

Aug 08, 2022

Learn how to use a PMS5003 air quality sensor with Ruby on the Raspberry Pi. We'll use this to monitor air quality and gather data.

4

How to manage and run Maintenance Tasks for Rails in Production

Feb 17, 2022

Deploying to production often requires running tasks to backfill new columns and other data. The maintenance_tasks gem from Shopify does a great job of allowing you to define tasks with arguments and run them in production.

3

Migrating from Rails UJS to Hotwire: Data Method, Confirm, and Disable With

Dec 29, 2021

Turbo now provides equivalents to Rails UJS data confirm, disable with, and method attributes that we can use.

19

How to Submit Complex Form Data in Ruby on Rails

Sep 21, 2020 Pro

It's a common situation that we need to submit complex data in our forms in our Rails apps. We'll explore how can we transform the simple values browser forms allow and convert them into something Rails can use and transform into Ruby objects.

4

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Forum Threads

Data Structure - Going back to the basic with Ruby

Hi Chris,Could you help me with books, material, videos about Data Structure with Ruby? I have been asked a lot about it in the interview. I am rusty about it and there are tons of pieces about on ...

William Kennedy replied February 28, 2018 5:36pm

Having some problems with Using certain data from API calls

Hi i've been struggling for a while now trying to grasp how to use the data received in an api call. A lot of tutorials are either outdated or focus solely on creating API's rather than using them....

kaine Wright replied April 11, 2018 6:34am

GoRails Performance - The Techniques I Use Discussion

Thanks Chris. The first time my name appears on a video :)

Daniel Morales replied March 4, 2021 8:14pm

Can I 'alias' a Rails active model to another class

First off I am sure I am not asking this question correctly as this is an advanced Rails topic over my head right now. Here is what I have for routes: concern :assetable do resources :ass...

Chris Oliver replied May 11, 2016 5:49pm

has_one association on polymorphic model

I have the following models (stripped down for simplicity) : ```ruby class Activity < ActiveRecord::Base belongs_to :trackable, polymorphic: true belongs_to :user has_one :comment, as: :t...

Greg Answer replied March 17, 2016 7:42pm

Using Parallel gem to achieve parallel processing in Ruby for increasing performance and making Rails Application faster.

Hi everyone, I'm trying to decrease API latency in our largely synchronous Ruby on Rails backend. While we use Sidekiq/Shoryuken for background jobs, the bottleneck is within the request-response c...

Searchkick Aggregation for has_many_through association

Gems / Libraries

Hey guys, I have an ecommerce product catalogue, where I store products, product options and option values in this kind of fashion: ``` # models/product.rb has_many :option_values has_many :optio...

Audited vs papertrail gem for auditing table changes?

I'm currently looking to use either one of these two for auditing changes made by specific user roles on a rails 6 ecommerce app using mysql. They both seem similar and I'm currently leaning toward...

anniesteuber replied January 31, 2024 3:36am

Create little (parse data, formatting and counting) project

Hello, friends. I am a total newbie in ruby, I want to try to do the following thing: create a program that will collect vacancies and monitor the number of repeated words from them. The structure ...

How do Rails developers work with JS developers on a project?

Hi there! I've been the only developer at my workplace for a while now and I've been coding in Rails, primarily. I don't have any formal qualifications in development, but I've been self-learning ...

Chris Oliver replied March 20, 2019 10:38am

How to get param values through radio_buttons ?

I'm trying to create a TARGET with a responsible user via form_with: ``` <% @users.each do |user| %> <%= f.radio_button :responsible_id ,'', id:"responsible-manage-#{user.id}", c...

rodolfo replied December 23, 2018 9:10pm

How to prevent access to a group if user isn't a member?

Hi all, I have user groups setup on my app using the code below... ``` class User < ActiveRecord::Base has_many :user_groups has_many :groups, through: :user_groups end class Group < A...

Alan Reid replied December 7, 2018 5:42pm

How do I display several posts in related "weeks"

I would like to structure my blog so that I can assign posts I have created with Trix and Shrine to weeks. I want to have 12 teaserboxes on my index page which can then be clicked and if I click o...

Best way to create a belongs_to object from a has_many

Sorry for the vague title but I cant think of a better explanation! Let's say I have a list of Users and an admin could click a button/link that would create a site for them from the existing ...

alangosh replied January 23, 2024 4:15am

Stimulus JS Framework Introduction Discussion

I'm literally figuring out StimulusJS right now on an app, and I was hoping you would do a screencast on it soon and save me some time! Awesome timing :)

joelGarcia93 replied August 8, 2022 9:52pm

Rails & Vue.js Trello Clone - Part 1 Discussion

Glad you decided to do this :)

don mclamb replied August 8, 2024 10:08pm

Analytics with Segment Discussion

Great episode Chris! Would be awesome to see some more detailed episodes both for client and server side implementations.

DURR replied March 27, 2019 8:46am

Preferences & Settings with ActiveRecord::Store Discussion

sthapit replied August 16, 2020 6:42pm

Refactoring Your jQuery Code with Objects in Coffeescript Discussion

Thanks for this episode! I was recently working on a Rails project and saw much the same setup in their JS, didn't really grasp it at a high level. I could see it was organized more than the JS I w...

Fabrizio Bertoglio replied April 24, 2018 7:32pm

Introduction to Importing from CSV Discussion

HP replied June 16, 2021 4:47pm

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