Write a custom rake task

Write a custom rake task

Dec 20,  · Writing a Practical Rake Task. Now for the task at hand, I’m going to create a rake task which creates a bunch of fake data for me to test with. First I’ll create a little experimental app: rails rake_example cd rake example script/generate scaffold person first_name:string last_name:string rake db:migrate rails generate admin fake_people Here’s the rake task (lib/tasks/blogger.com) If you want to write your own rake task you have 2 ways to do it (I thought so before): Write it from scratch Copy-paste code from another ready rake task and change code to required Jul 19,  · Creating Our Rake File Your custom rake tasks must be written in a file with blogger.com extension which must be located within./lib/tasks. touch./lib/tasks/blogger.com

creating a custom rake task « the evolving ultrasaurus

Rake provides a great way to automate repetitive or complex tasks. Write a custom rake task a look at creating a simple and a more complex task. Rake is a nice, powerful tool for automating tasks in a ruby project. We've chatted here about how to accept arguments within a rake taskand I suspect that will be of use coming out of this discussion. However, for the purposes of getting started with rake, let's consider some simple examples.

First, you need to get setup. If your project doesn't already have rake installed, then you'll need to add it to your project. I wrote an article on just that topic. The description desc gives a brief description of what the task does, write a custom rake task, which comes in handy when you start adding a handful of tasks. The name is a unique way in which you identify the task.

And last, the code block is the code that is executed when the task is run. In addition, note that although rake tasks are written in ruby, their file extension is. rakeNOT. Note: This ignores tasks without descriptions. To see all tasks including tasks without description, you can add a v option:. Also note: If you are using rake from your Gemfile, it's best to use bundle exec to ensure we run the correct version of rake:. Let's add the simplest of all the simple tasks ever there were.

Our "Hello World" task will simply tell us "Hello. Really, rake is just a means by which you can execute ruby scripts. Therefore, it can do almost anything you can imagine to help you be more productive. Let's take a task I put into most Ruby on Rails projects.

This task finds all of the models in your application and creates CSV files for you to fill in seed data. A namespace simply segments the task. The line below doesn't just initiate the task.

It also loads the environment. Inside the task, we first make sure we include all the files. glob steps through each file in the specified path, which we called the file variable, while we simply require it. The next thing our guts all happens in one loop, write a custom rake task.

The loop begins by stepping through each ActiveRecord model, as we do with write a custom rake task line:. Now the write a custom rake task is available via the model object. We check to see if the seed file already exists:. Within that file with the f objectWith initialize it by make that models columns the headers in the file. That's just one example, but you can see how you can take time-consuming tasks and turn them into repeatable solutions via a rake task.

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The code is built, deployed, and hosted with help from GitHub and Netlify. All Posts How to Write a Custom Rake Task Rake provides a great way to automate repetitive or complex tasks. Rake Ruby on Rails. Setup First, you need to get setup. Rake Syntax Rake tasks follow this convention: desc ' end Rake tasks have three main parts: description name code block The description desc gives a brief description of what the task does, which comes in handy when you start adding a handful of tasks.

rake desc 'Say hello! First let's look at the task, then we'll break it down. glob " { Rails. mkdir dir unless Dir. dir ActiveRecord : : Base. each do model unless File. tableize }. csv" File. write model. csv" end end end end end Namespace A namespace simply segments the task. each { file require file } Inside the task, we first make sure we include all the files. Creating Directories Next, we make a new directory to place our files in, unless it already exists.

dir Write a custom rake task Through Models and Creating Files The next thing our guts all happens in one loop. The loop begins by stepping through each ActiveRecord model, as we do with this line: ActiveRecord : : Base.

each do model Now the model is available via the model object. We check to see if the seed file already exists: unless File. csv" And if it doesn't, then we write a new file. join ',' And last, we let the user know we created a file.

csv" That's just one example, but you can see how you can take time-consuming tasks and turn them into repeatable solutions via a rake task. Read past issues. Home This site was created and is maintained by Sean C Davis. And here's a super important legal document Sean made up. Social Links Blog Twitter GitHub. Site References License Code.

Basic Rake by Jim Weirich

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How to generate rake task – Rails Guides

Dec 20,  · Writing a Practical Rake Task. Now for the task at hand, I’m going to create a rake task which creates a bunch of fake data for me to test with. First I’ll create a little experimental app: rails rake_example cd rake example script/generate scaffold person first_name:string last_name:string rake db:migrate rails generate admin fake_people Here’s the rake task (lib/tasks/blogger.com) If you want to write your own rake task you have 2 ways to do it (I thought so before): Write it from scratch Copy-paste code from another ready rake task and change code to required Jul 19,  · Creating Our Rake File Your custom rake tasks must be written in a file with blogger.com extension which must be located within./lib/tasks. touch./lib/tasks/blogger.com