1. if path is file call FileUtils. rm_rf – it is safe to delete even in windows.
2. if dir call Dir. rmdir which will succeed for empty dir and dir symlink. else will get ENOTEMPTY for regular non empty dir.
3. iterate the dir and call rec_del for each item.
4. now call again Dir. rmdir which will succeed.

How do I delete a file in rails?

Learning Rails: removing files and folders

1. Step 1: Create a simple Route that renders Hello world. I add this line to the config/routes.rb : get ‘simple/index’ => ‘simple#index’
2. Step 2: Removing the ApplicationController.
3. Step 3: Moving Controller to Metal.
4. Step 4: Update config.
5. Step 5: Delete more unused folder.

How do I delete a record in Ruby on rails?

Rails delete operation using destroy method By using destroy, you can delete the record from rails as well as its other existing dependencies. So in the context of our rails application, if we delete a book record using the destroy function, the authors associated with the book will also be deleted.

How do you rename a file in Ruby?

rename(f, folder_path + filename. capitalize + File. extname(f)) end puts “Renaming complete.”

How do you create a directory in ruby?

If you want to create a new folder with Ruby you can use the Dir. mkdir method. If given a relative path, this directory is created under the current path ( Dir. pwd ).

How do I delete a controller in Rails?

you just put d(destroy) instead of g(generate) in your migration. rails destroy controller sample. If you want to reverse the generation, all you have to do is swap generate with destroy .

How do I check the size of a file in Ruby?

A File is an abstraction of any file object accessible by the program and is closely associated with class IO . File includes the methods of module FileTest as class methods, allowing you to write (for example) File. exist?(“foo”) .

How do I change directory in Ruby?

chdir : To change the current working directory, chdir method is used. In this method, you can simply pass the path to the directory where you want to move. The string parameter used in the chdir method is the absolute or relative path.

How to delete a lot of Records in ActiveRecord?

If you need to delete a lot of records quickly, ActiveRecord gives .delete_all method. to be called directly on a model, to delete all records in that table, or a collection. Beware though, as .delete_all does not instantiate any object hence does not provide any callback ( before_* and after_destroy don’t get triggered).

How do I delete all records in Ruby on rails?

Ruby on Rails.delete_all . Example. If you need to delete a lot of records quickly, ActiveRecordgives .delete_allmethod. to be called directly on a model, to delete all records in that table, or a collection. Beware though, as .delete_alldoes not instantiate any object hence does not provide any callback

Is there a way to delete records without a primary key?

Alternatively you can use delete and delete_all which won’t enforce :before_destroy and :after_destroy callbacks or any dependent association options. User.delete_all (condition: ‘value’) will allow you to delete records without a primary key

Is there a callback for delete_all() method?

Beware though, as .delete_all does not instantiate any object hence does not provide any callback ( before_* and after_destroy don’t get triggered). Get monthly updates about new articles, cheatsheets, and tricks.