CODEWITHSUNDEEP
ruby-on-railsrubyruby-on-rails-5
Padu
Padu

Reputation: 99

Passed param from form submit is not saved to the database even though it exists

I am new to Rails and I am trying to save a link to a database but when I submit the link only the time stamps are saved. If I try to use require in my controller it says it is empty which confuses me even more. Is this related to convention I am breaking which Rails does no like ?

index.html.erb

<%= form_for WatchedLink.new, url: {action: "create"}, html: {class: "links_to_be_scraped"} do |f| %>
  <%= f.text_field (:link) %>
  <%= f.submit "Save" %>
<% end %>

page_to_be_scraped_controller.rb

class LinksToBeScrapedController < ApplicationController

  def index     
    @watched_links = WatchedLink.all
  end

  def show
    @watched_links = WatchedLink.find(params[:id])

  end

  def new
    @watched_links = WatchedLink.new


  end

  def create

    @link = WatchedLink.new(params.permit(:watched_link))

    if @link.save 
      puts "ADDED TO THE DATABASE #{params[:watched_link]}"
    else
      puts "FAILED TO ADD TO THE DATABASE"
    end
  end

  def edit

  end

  def upadate

  end

  def delete

  end

  def destroy

  end
end

Log

Started POST "/links_to_be_scraped" for 127.0.0.1 at 2018-02-11 03:19:04 +0000
Processing by LinksToBeScrapedController#create as HTML
  Parameters: {"utf8"=>"✓", "authenticity_token"=>"jMv4C+k0OSkgDAj/Rw6UcZX9hFZHhbG6P4Dcb/2oyeybnVRtuOqscQZEON0rjG0Q/s6Bp6zBlUQIsVEnL5ikiw==", "watched_link"=>{"link"=>"www.google.com"}, "commit"=>"Save"}
Unpermitted parameters: utf8, authenticity_token, watched_link, commit
   (0.1ms)  BEGIN
  SQL (0.2ms)  INSERT INTO `watched_links` (`created_at`, `updated_at`) VALUES ('2018-02-11 03:19:04', '2018-02-11 03:19:04')
   (66.5ms)  COMMIT
ADDED TO THE DATABASE {"link"=>"www.google.com"}
No template found for LinksToBeScrapedController#create, rendering head :no_content
Completed 204 No Content in 108ms (ActiveRecord: 66.7ms)


Started GET "/" for 127.0.0.1 at 2018-02-11 03:19:06 +0000
Processing by LinksToBeScrapedController#index as HTML
  Rendering links_to_be_scraped/index.html.erb within layouts/application
  WatchedLink Load (0.3ms)  SELECT `watched_links`.* FROM `watched_links`
  Rendered links_to_be_scraped/index.html.erb within layouts/application (9.0ms)
Completed 200 OK in 22ms (Views: 20.6ms | ActiveRecord: 0.3ms)

Upvotes: 1

Views: 230

Answers (1)

Sebasti&#225;n Palma
Sebasti&#225;n Palma

Reputation: 33481

You're sending the form with the params { watched_link: { link: ... } }, but in your controller your create isn't accessing to watched_link.

Update name of the text_field tag helper in your form:

<%= form_for WatchedLink.new, url: { action: "create" }, html: { class: "links_to_be_scraped" } do |f| %>
  <%= f.text_field :link %>
  ...
<% end %>

And in your controller:

@link = WatchedLink.new(params.require(:watched_link).permit(:link))

You could move the new argument used in create to a strong params definition, like:

private

def watched_link_params
  params.require(:watched_link).permit(:link)
end

Then you can just update the create action to:

@links = WatchedLink.new(watched_link_params)

Also consider taking a look to the ActionController::StrongParameters.

Upvotes: 1

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