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Site Wide Announcements
Sometimes you need to display an administrative announcement to every page on the site and give the users the ability to hide the announcement. See how in this episode.
(13 minutes)
Refactoring Long Methods
In this episode I walk you through an exercise in refactoring by taking a long method and making it more concise.
(7 minutes)
Model Name in URL
By default, Rails uses the model's id in the URL. What if you want to use the name of the model instead? You can change this behavior by overriding the to_param method in the model. Watch this episode for details.
(6 minutes)
Hacking ActiveRecord
Have you ever wanted to temporarily disable all validations? Well, ActiveRecord doesn't support this, but that doesn't mean we can't add it. This episode will show you how to open up an existing class and change its behavior.
(11 minutes)
Optimistic Locking
When two people attempt to update the same record near the same time, one of the updates will likely be overwritten. You can solve this problem with optimistic locking.
(7 minutes)
Create Model Through Text Field
Let's say you provide a select menu for setting which category a given product belongs to, but you also want the option of creating a new category by typing the name in a text field. See a great way to do that in this episode.
(5 minutes)
Two Many-to-Many
There are two different ways to set up a many-to-many association in Rails. In this episode you will see how to implement both ways along with some tips on choosing the right one for your project.
(9 minutes)
Conditional Validations
By default, validations will take place every time the model is saved. Sometimes you only want a validation to happen when certain conditions are met. See how to do that in this episode.
(4 minutes)
Making a Plugin
You can sometimes remove a lot of duplication by generating methods dynamic. In this episode I will show you how to create a plugin which does exactly that.
(7 minutes)
Time in Text Field
Although Rails does allow you to edit time attributes with text fields, it's not very flexible. In this episode you will learn how to use a virtual attribute to format the time to your liking.
(5 minutes)