param is missing or the value is empty: - ruby-on-rails-4

Here is booking controller:
class BookingsController < ApplicationController
before_action :logged_in_user, only: [:create]
def new
#booking = Booking.new
end
def index
#bookings = Booking.all
end
def create
#booking = current_user.bookings.build(booking_params)
if #booking.save
flash[:success] = "Booking created!"
redirect_to root_url
else
render 'static_pages/home'
end
end
def show
#booking = Booking.find(params[:id])
end
def destroy
#booking = Booking.find(params[:id])
#booking.destroy
redirect_to bookings_path
end
private
def booking_params
params.require(:booking).permit(:date, :hour, :game)
end
end
When I post after the utf8 and authenticity token I don't understand why "#<\Booking:0x000001061928a8>\" instead of simply "booking" then the nested hash contains date, hour and game which I permit in the controller.
Here is the view:
<%= form_for(#booking) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<%= f.label :day %>
<%= date_field(#booking, :date) %>
<%= f.label :hour %>
<%= number_field(#booking, :hour, in: 8..19) %>
<%= f.label :game %>
<%= select(#booking, :game, [['Singles', 1], ['Doubles', 2]]) %>
<%= f.submit "Book", class: "btn btn-primary" %>
<% end %>
Any help much appreciated.

Ok it was simply that I wasn't using the the f variable of the form builder for the select boxes, originally I was but I'd had problems rendering the select boxes so I'd taken it out. Must have been due to a syntax error.
Here's the working form_for with a date picker and other select boxes:
<div class="field">
<%= form_for(#booking) do |f| %>
<%= render 'shared/error_messages', object: f.object %>
<%= f.label :day %>
<%= f.date_field :day %>
<%= f.label :hour %>
<%= f.number_field :hour, in: 8..19 %>
<%= f.label :game %>
<%= f.select :game, [['Singles', 1], ['Doubles', 2]] %>
<%= f.submit "Book", class: "btn btn-primary" %>
<% end %>
</div>

Related

Ransack: boolean attributes are ignored, all records are returned instead

I'm using ransack to allow users do dynamical searching:
Controller:
#q = Visit.search(params[:q]);
#visits = #q.result(distinct: true)
#q.build_condition
Model:
def self.ransackable_attributes auth_object = nil
(column_names - UNRANSACKABLE_ATTRIBUTES) + (_ransackers.keys)
end
View:
<%= search_form_for #q, url: doctor_visits_path do |f| %>
<%= f.condition_fields do |c| %>
<%= render "condition_fields", f: c%>
<% end %>
<p><%= link_to_add_fields "Add condition", f, :condition %>
<div class="actions"><%= f.submit "Search", {:class => "btn"} %></div>
<% end %>
Partial:
<div class="field">
<%= f.attribute_fields do |a| %>
<%= a.attribute_select({ associations:
[:specialists, :treatment_factors]
},{:class => "form-control"}) %>
<% end %>
<%= f.predicate_select({},{:class => "form-control"}) %>
<%= f.value_fields do |v| %>
<%= v.text_field :value,{:class => "form-control"} %>
<% end %>
<%= link_to "Remove", '#', class: "remove_fields" %>
</div>
I have several boolean attributes in Visits table. When I choose the boolean attribute in the first field, true or false in second (predicate field) and leave the third value field empty, the params are generated correctly, but the sql query is not, the condition is ignored and all the records from the table are returned instead.
What can be the reason?
Add in your model:
Simple version, using PostgreSQL:
ransacker :predicate do
Arel.sql("to_char(\"#{table_name}\".\"predicate\", '99999')")
end
and the same, using MySQL:
ransacker :predicate do
Arel.sql("CONVERT(#{table_name}.id, CHAR(4))")
end

Using hstore and saving new values for user

My user model contains values for things like:
name, email, phone, approved, etc..
The scope of the project I am working on includes custom user settings and for this reason I am using hstore (I dont want to create a user_settings table).
On the user edit view I want to create a checkbox called 'colors' and whether or not the checkbox is checked determines if that setting is set for the user or not.
I have already setup hstore as follows:
class AddHstore < ActiveRecord::Migration
def up
enable_extension :hstore
end
def down
disable_extension :hstore
end
end
And updated the User model as follows:
class AddSettingsToUser < ActiveRecord::Migration
def up
add_column :users, :settings, :hstore
end
def down
remove_column :users, :settings
end
end
This is essentially my user edit view:
<%= form_for(resource, as: resource_name, url: registration_path(resource_name), html: { method: :put, :class => "form-horizontal user" }) do |f| %>
<%= devise_error_messages! %>
<div class="field">
<%= f.label :name %><br />
<%= f.text_field :name, autofocus: true %>
</div>
<div class="field">
<%= f.label :email %><br />
<%= f.email_field :email %>
</div>
<div class="field">
<%= f.label :phone_number %><br />
<%= f.text_field :phone_number %>
</div>
<div class="actions">
<%= f.submit 'Update', :class => 'btn btn-primary' %>
</div>
<% end %>
At this point I am unsure as to how to actually implement this functionality. The user edit page allows the user to change their name, phone and other values but how would I include a new value for the hstore settings?
Inside the form_for from where you are creating users, add your hstore fileds like below :
<%= form_for resource, ...do |f| %>
#...
<%= f.fields_for :settings do |settings| %>
<%= settings.text_field :field1 %>
<%= settings.text_field :field2 %>
<% end %>
#....
<% end %>
Then update your controller strong parameter method like below to permit these new fields.:
def user_params
params.require(:user)
.permit(
:name,
:email,
settings: [ :field1, :field2 ]
)
end
Now, you are done. Open your rails console and try some sample data like
User.create(
settings: { field1: 'data1', field2: 'data2' }
)

errors messages doesn't work in HTML ruby code

I am using rails 4.1.6 I looked at the active record validations site and follow their direction, but nothing is displayed in the HTML even if there is an error.
However, when I do it in rails console it works.
post = Post.new #create an empty post to test
post.valid? #false
post.errors.messages #this is successfully generate the error message array
However, it doesn't display any error messages in HTML. In fact "#post.errors" doesn't even run
-Ruby code in html
<%= form_for #post, :method => :post do |f| %>
<%= f.label :title %>
<%= f.text_field :title %>
<%= f.label :url %>
<%= f.text_field :url %>
<%= f.submit "Submit" %>
<% if #errors.any? %>
<ul>
<% #errors.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
<% end %>
<% end %>
-My PostsController
def create
# post = Post.new(title: params[:post][:title], url: params[:post][:url])
post = Post.new(post_params)
if post.save
redirect_to posts_path
else
#errors = post.errors.messages
redirect_to paths_path
end
end
private
def post_params
params.require(:post).permit(:title, :url)
end
-My post model
class Post < ActiveRecord::Base
validates :title, :length => {maximum: 140, minimum:1}, :presence => true
validates :title, :length => {maximum: 2083, minimum:1}, :allow_blank => true
end
When it comes to errors I do like to have a partial so I can keep my errors the same in the whole app like so:
app/views/shared/_errors.html.erb:
<% if object.errors.any? %>
<h5>The <%= t("activerecord.models.#{object.class.to_s.downcase}") %> could not be saved due to the following errors:</h5>
<ul>
<% object.errors.full_messages.each do |msg| %>
<li><%= msg %></li>
<% end %>
</ul>
<% end %>
And then for the views you want the errors to be displayed, just call:
<%= render 'shared/errors', object: #your_object %>
Hope this helps!
thanks for your help. Got some tip from my teacher it work. Simply use flash[:message] and it worked. Sorry for the trouble everyone
-My controller code
def create
post = Post.new(post_params)
if post.save
redirect_to :back
else
flash[:message] = post.errors.messages
redirect_to :back
end
end
-My HTML code
<%= simple_form_for #post, :method => :post do |f| %>
<%= f.label :title %>
<%= f.text_field :title %>
<%= f.label :url %>
<%= f.text_field :url %>
<%= f.submit "Submit" %>
<%= flash[:message] %>
<% end %>

ruby on rails: empty database records

I am new to Ruby on Rails. I am building a basic application for learning purpose.
I build a form and when I use the Save button, a record is created but it is a empty record with only an Id.
I hope someone can help me.
routes.rb
Rails.application.routes.draw do
get 'welcome/index'
resources :relaties
root 'welcome#index'
new.html.erb
<h1>Nieuwe Relatie</h1>
<%= form_for :relatie, url: "/relaties" do |f| %>
<p>
<%= f.label :naam %><br>
<%= f.text_field :naam %>
</p>
<p>
<%= f.label :straatnaam %><br>
<%= f.text_field :straatnaam %>
</p>
<p>
<%= f.label :huisnummer %><br>
<%= f.text_field :huisnunmmer %>
</p>
<p>
<%= f.label :postcode %><br>
<%= f.text_field :postcode %>
</p>
<p>
<%= f.label :plaats %><br>
<%= f.text_field :plaats %>
</p>
<p>
<%= f.label :omschrijving %><br>
<%= f.text_area :omschrijving %>
</p>
<p>
<%= f.submit %>
</p>
<% end %>
relaties_controller.rb
class RelatiesController < ApplicationController
def new
#relatie = Relatie.new
end
def create
#relatie = Relatie.new(params[:relatie])
#relatie.save
redirect_to(#relatie)
end
private
def relatie_params
params.require(:relatie).permit(:naam, :straatnaam, :huisnummer, :postcode, :plaats, :omschrijving)
end
def show
#relatie = Relatie.find(params[:id])
end
end
While creating/ updating a record you should whitelist the attributes that you would like to be saved in database. You have added a method named relatie_params to do that BUT you have not used it in the code which is why when you try to create a new Relatie record none of the attributes are stored in database as they are not white-listed.
In create action, replace
#relatie = Relatie.new(params[:relatie])
with
#relatie = Relatie.new(relatie_params)
For your reference, read about Strong Parameters which was introduced in Rails 4

Ruby on Rails Guides | partial variable - cannot contain nil or be empty

I am following Ruby on Rails Guides and I have an error in rendering partial when I want to create a new article:
First argument in form cannot contain nil or be empty
Marked error is from partial _form.html.erb located in the same place as index:
<%= form_for #article do |f| %>
index.html.erb has link:
<%= link_to 'New article', new_article_path %>
controller:
def create
#article = Article.new(article_params)
#article.save
redirect_to #article
end
form partial:
<%= form_for #article do |f| %>
<p>
<%= f.label :title %><br>
<%= f.text_field :title %>
</p>
<p>
<%= f.label :text %><br>
<%= f.text_area :text %>
</p>
<p>
<%= f.submit %><br>
</p>
<% end %>
new.html.erb which renders partial:
<h1>New article</h1>
<%= render 'form' %>
<%= link_to 'Back', articles_path %>
your controller needs a new method
def new
#article = Article.new
end
that way there's an #article object that the form_for can reference.
When you follow a new link, the new action is executed and the form is displayed. It's only when the form is submitted that the create action is executed.