通过名称而不是ID查找的参数

Question

I want the url structure to be 'actors/joe-blogs' instead of 'actors/1' but with the id out of the url I cant get params to find by name instead of find by id.

I have the following route

get 'actors/:name' => 'actors#show'

actors table

| id |   name    |
------------------
| 1  | Joe Blogs |

The url /actors/joe-blogs works fine but finding params by name instead of id doesn't work.

actors controller:

    def show
       @actor = Actor.find(params[:name])
    end

Finding by params name looks for the actor with {"name"=>"joe-blogs"} instead of looking for the actor with {"name"=>"Joe Blogs"}

How can I get params to work so it grabs {"name"=>"Joe Blogs"} ? without the '-' in-between the name?

Answer 1

You should use find_by instead of find .

def show
  @actor = Actor.find_by(name: params[:name])
end

Answer 2

You'll be best using friendly_id , which will fix all of this functionality for you. You won't have to change anything except adding a slug column to your datatable:

#Gemfile
gem 'friendly_id', '~> 5.1'

$ rails generate friendly_id
$ rails generate scaffold actor name:string slug:string:uniq
$ rake db:migrate

#app/models/actor.rb
class Actor < ActiveRecord::Base
   extend FriendlyID
   friendly_id :name, use: [:slugged, :finders]
end

$ rails c
$ Actor.find_each(&:save)

This should set up all your Author records to have a slug , which will allow you to use the following:

#config/routes.rb
resources :actors #-> no change required

#app/controllers/actors_controller.rb
class AuthorsController < ApplicationController
   def show
      @author = Actor.find params[:id] #-> will automatically populate with slug
   end
end