my ruby rails cheat sheet



Skip actions 

skip_before_action :verify_authenticity_token
protect_from_forgery :except => :create

Create an API project 

rails new my_api --api

Create a normal project 

rails new blog

Create Model 

$ bin/rails generate model Article title:string text:text

Start server 

bin/rails server

Controller 

bin/rails generate controller Welcome index

 Running Migration 

 rails db:migrate

 Rollback Migration 

rake db:rollback STEP=1

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The specified initialization vector (IV) does not match the block size for this algorithm

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If you're getting  exception when trying to assigned key to a symmetric key and getting error message below :- The specified initialization vector (IV) does not match the block size for this algorithm And your code probably look like something below :- Then you need to go into debug mode and start looking into the supported size for IV as shown in diagram below :- As you can see, IV is 16 bytes, so you need to provide 16 bytes. The same goes for Key field too, if you're adding anything to it. As long as you provide a valid key size, then we're good and you're code will be ready.
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