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Ruby Rails Routes and Resources Routes to Create Actions Controller Action to Create Pets

Posted by Marcela Jackowski
Marcela Jackowski
2,045 Points

Here's the full set of parameters coming in from a POST request again:

I cannot find help for this question. Thanks

app/controllers/pets_controller.rb 
class PetsController < ApplicationController

  def show
    @pet = Pet.find(params[:id])
  end

  def new
    @pet = Pet.new
  end

  def create
    pet_params = permit(:name)
    @pet = Pet.new(pet_params)
    @pet.save
  end

end
Juan Luna Ramirez
Juan Luna Ramirez
9,038 Points
Juan Luna Ramirez
Juan Luna Ramirez
9,038 Points

Rails saves any POST data to a params hash, in this case

params = {
    "pet" => { "name" => "Jessie" }, 
    "commit" => "Create Pet"
}

http://guides.rubyonrails.org/action_controller_overview.html#parameters

Then, in order to get the pet hash { "name" => "Jessie" } from params we need to require it like so 

pet_hash =  params.require(:pet)

Now that we have the pet hash we can say which attributes are ok to update like so

permitted_pet_attributes = pet_hash.permit(:name)

Permitting is important to prevents accidentally allowing users to update sensitive model attributes. http://guides.rubyonrails.org/action_controller_overview.html#strong-parameters

Next we can instantiate a new pet object

@pet = Pet.new(permitted_pet_attributes)

Finally we save to the database

@pet.save

Of course you can chain methods together. I'll leave that up to you.