Get form data in controller rails - ruby-on-rails

I'm fairly new to rails and didin't find a soloution after a lot of research...
I want to build a simple data abstaraction test app. I have a text field and a submit button and I want to do something with the input (like ie. .upcase ) and then print it out. On submit, I get a routing error, though.
What am I doing wrong?
application.html.erb
<body>
<%= form_tag("parse_input", method: "post") do %>
<%= text_field(:ans, :field) %>
<%= submit_tag("submit" %>
<% end %>
FormControllerController.rb
class FormControllerController < ApplicationController
def parse_input
params[:ans].each do |value|
puts value
end
end
end
routes.rb
Rails.application.routes.draw do
...
root :to => 'application#home'
get "application" => "form_controller_controller"
end
I don't want to use a DB btw.

Try below code:
routes.rb
Rails.application.routes.draw do
...
root :to => 'application#home'
post "parse_input" => "form_controller_controller#parse_input"
end
application.html.erb
<body>
<%= form_tag("/parse_input") do %>
<%= text_field(:ans, :field) %>
<%= submit_tag("submit") %>
<% end %>

Related

Rails 5. How to submit from the form_tag to custom action?

I'm a real newbie at Ruby and Rails, and I've been looking for the solution for two days. I need to submit data from form_tag to action 'create' in my controller to add new entries to database, but looks like I'm doing something terribly wrong, because absolutely nothing happens, and it seems that form_tag doesn't even redirect to needed action.
Here's the page code:
<h1>Todos</h1>
<% #projects.each do |project| %>
<tr>
<h2><%= project.title %></h2>
<% project.todos.each do |todo| %>
<ul style="list-style-type:disc">
<li><%= todo.text %></li>
</ul>
<% end %>
</tr>
<% end %>
<%= form_tag({controller: "mega", action: "create"}, method: "get", remote: true) do %>
<h2>New todo</h2>
<p>
<%= text_field_tag 'text' %>
</p>
<p>
<%= select_tag 'title', options_from_collection_for_select(#projects, 'id', 'title') %>
</p>
<p>
<%= link_to 'CANCEL' %>
<%= link_to 'OK', "", :onclick => "$('#form_id').submit()" %>
</p>
<% end %>
And the controller:
class MegaController < ApplicationController
def index
#projects = Project.all
#todos = Todo.all
end
def update
end
def create
#newTodo = Todo.create(text: params[:text])
#newProject = Project.find_by(title: params[:title])
#newProject.todos << #todo
#newTodo.save
end
end
My routes file. I seriously don't know how it works:
Rails.application.routes.draw do
get 'mega/index'
root 'mega#index'
get 'mega/update'
post 'mega/create'
resources :todos
resources :projects
end
You create resources with a POST request. Never GET.
GET requests should be idempotent - they should not update or alter resources on the server. One very important reason is that they are stored in the browser's history, so pressing the back button will cause unintended consequences for the user.
In Rails flavor MVC instead of tacking the action name on the path of the route you use the HTTP verb to create routes to the correct action:
GET /things things#index
POST /things things#create
I'm not going to attempt to salvage your code (it's deeply flawed) and instead show you how you would solve this the rails way as it is much simpler:
<%= form_for(Todo.new) do |f| %>
<h2>New todo</h2>
<%= f.text_field :text %>
<%= f.collection_select(:project_id, #projects, :id, :title, prompt: true) %>
<%= f.submit %>
<% end %>
This would submit to todos#create - if you want to route it to an unconventional action you can use the url option:
<%= form_for(Todo.new, url: polymorphic_path(controller: 'foo', action: 'bar')) do |f| %>
It's best to learn the rules before you break them.

Rails route to a resource

I'm building a Rails app that is a podcast directory. I have Podcasts and Episodes. Episode belongs to Podcast and Podcast has many Episodes. On the home page I want to show the last 5 episodes that have been created and link to them.
I have it working with this, though this is obviously not the way to do it:
<% #episodes.each do |episode| %>
<%# link_to episode do %>
<%= episode.title %>
<%# end %>
<% end %>
The link_to is commented out because that's part of my problem.
Here is the index controller:
def index
#podcasts = Podcast.where.not(thumbnail_file_name: nil).reverse.last(5)
#episodes = Episode.where.not(episode_thumbnail_file_name: nil).reverse.last(5)
end
Here is the routes file:
Rails.application.routes.draw do
devise_for :podcasts
resources :podcasts, only: [:index, :show] do
resources :episodes
end
authenticated :podcast do
root 'podcasts#dashboard', as: "authenticated_root"
end
root 'welcome#index'
end
Results of rake routes | grep episode:
podcast_episodes GET /podcasts/:podcast_id/episodes(.:format) episodes#index
POST /podcasts/:podcast_id/episodes(.:format) episodes#create
new_podcast_episode GET /podcasts/:podcast_id/episodes/new(.:format) episodes#new
edit_podcast_episode GET /podcasts/:podcast_id/episodes/:id/edit(.:format) episodes#edit
podcast_episode GET /podcasts/:podcast_id/episodes/:id(.:format) episodes#show
PATCH /podcasts/:podcast_id/episodes/:id(.:format) episodes#update
PUT /podcasts/:podcast_id/episodes/:id(.:format) episodes#update
DELETE /podcasts/:podcast_id/episodes/:id(.:format) episodes#destroy
How can I correctly create a text link of the title using a link_to that links directly to the episode? Thanks!
When you're using link_to with a block, the only thing you need to pass into the block is the text of the link, so you should be able to do this (assuming your routes are setup properly):
<% #episodes.each do |episode| %>
<%= link_to episode, class="tt-case-title c-h5" do %>
<%= episode.title %>
<% end %>
<% end %>
UPDATE
You really don't even need to use a block here. This should work fine for you and be a little more succinct.
<% #episodes.each do |episode| %>
<%= link_to episode.title, episode, class="tt-case-title c-h5" %>
<% end %>
UPDATE #2
Thanks for including your route info. Try this:
<% #episodes.each do |episode| %>
<%= link_to episode.title, podcast_episode_path(episode.podcast, episode), class="tt-case-title c-h5" %>
<% end %>

ActionController::UrlGenerationError in Univ#index

I tried to list out the values of a specific table in the database using the following view file
index.html.erb
<%= form_tag univ_path, method: :get do %>
<p>
<%= text_field_tag :query, params[:query] %>
<%= submit_tag "Search", name: nil %>
</p>
<% end %>
<h1>List of Universities based on ranking</h1>
<div id="articles">
<% #univ.each do |univ| %>
<h2>
<%= link_to univ.univ_name, univ %>
</h2>
<div class="info">
<b>Location:</b> <%= univ.location %>, <%= univ.state %> <br/>
</div>
<br /><br />
<div class="content"><p><%= univ.description %><p></div>
<% end %>
</div>
and the controller file is as follows
univ_controller.rb
class UnivController < ApplicationController
def index
if params[:query].present?
#univ= Univ.search(params[:query])
else
#univ=Univ.all
end
end
def show
#univ= Univ.find(params[:id])
end
def register
#univ = Univ.new(params[:univ])
if(request.post? and #univ.save)
flash[:notice]= "Account Created Successfully"
redirect_to :controller => 'univ', :action => 'register'
end
end
end
I was able to list out the contents of the table from db. However, when I include the form_tag for implementing search it results an error
No route matches {:action=>"show", :controller=>"univ"} missing required keys: [:id]
my routes.rb has
resources :univ get 'search' => "univ#index", :as => "search"
Please suggest necessary changes
Change the form_for in index.html.erb as below:
<%= form_tag search_path, method: :get do %>
I suppose you intended to submit the form on index action using the search route defined as:
get 'search' => "univ#index", :as => "search"
for that you would have to submit the form on search_path.
You are getting the error as No route matches {:action=>"show", :controller=>"univ"} missing required keys: [:id] because currently you are submitting the form on univ_path which would route to show action and therefore require an id.
I just had this problem with a project I'm working on, and it turned out to be a Nil field in my database. Are you saving data to ruby sqlite? Check for a record that has a nil [:id] and delete that record using Model.destroy(id) and you should be able to render the page again

Routing issue. No routes found, but I know these exist

Noob here.
Trying to figure out how to display a method in my controller into my index page. Here is what I have thus far.
Controller -
class SammichesController < ApplicationController
def index
#sammiches = Sammich.all
end
def create
#sammich = Sammich.find_by_name(params[:sammich][:name])
end
def random
#sammichy = Sammich.rand(params[:sammich][:name])
end
end
Routes-
Sammiches::Application.routes.draw do
resources :sammiches do
get "random"
end
root :to => 'sammiches#index'
Index-
<h1>All my Sammiches</h1>
<%= form_for Sammich.new do |f| %>
<%= f.label :sammich %>
<%= f.text_field :name %>
<%= f.submit 'Find Sammich', :id => 'sammich_submit' %>
<% end %>
<%= link_to "Random sandwich", sammich_random_path %>
routes-
sammich_random GET /sammiches/:sammich_id/random(.:format) sammiches#random
sammiches GET /sammiches(.:format) sammiches#index
POST /sammiches(.:format) sammiches#create
new_sammich GET /sammiches/new(.:format) sammiches#new
edit_sammich GET /sammiches/:id/edit(.:format) sammiches#edit
sammich GET /sammiches/:id(.:format) sammiches#show
PUT /sammiches/:id(.:format) sammiches#update
DELETE /sammiches/:id(.:format) sammiches#destroy
root / sammiches#index
Error-
localhost:3000 - Routing Error
No route matches {:action=>"random", :controller=>"sammiches"}
Try running rake routes for more information on available routes.
Any assistance would be much appreciated.
Thanks!
If you look at your route it has :sammic_id in there as well:
sammich_random GET /sammiches/:sammich_id/random(.:format) sammiches#random
Which means you need to pass an id to your URL helper sammich_random_path which you haven't.
Update your routes to this:
resources :sammiches do
collection do
get "random"
end
end
After adding that your route would be just /sammiches/random

Couldn't find <object> without an ID Rails

I am trying to ensure that each job has the correct link when a user clicks on it.
The issue I am having is that I keep getting the error Couldn't find job without an ID.
In my view I have the following code:
<% #jobs.group_by{|x| x.created_at.strftime("%d %b. %Y")}.each do |date,jobs_on_that_date| %>
<section class="date"><%= date %></section>
<section id="top-job">
<% jobs_on_that_date.each do |job| %>
<section id="job-wrapper">
<%= link_to url_with_protocol(#link.job_url), :target => '_blank' do %>
<section id="job">
<%= job.title %> - <%= job.company %>
<%= job.salary %>
<%= job.location %>
<%= job.job_type %>
</section>
</section>
<% end %>
<% end %>
</section>
<% end %>
In my controller I am creating an object called #link as follows:
def index
#user = current_user
#jobs = Job.where('created_at > ?', 30.days.ago).reverse
#link = Job.find(params[:id])
end
Finally I have the following Routes setup.
JobappV2::Application.routes.draw do
devise_for :users
resources :jobs
resources :users do
resources :jobs
end
root :to => 'jobs#index'
end
If I use #link = Job.find(2) this works but every job ends up with the link input by the job with id 2.
Thanks in advance for any help!
what is params[:id]?
I suspect that if you do raise params[:id].inspect in your controller, you will find it's nil. Besides, what's the point in creating #link? just put job.job_url in your view instead of #link.job_url

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