Extract search functionality to Form Object in Rails - ruby-on-rails

Question

In my Rails application I have simple search functionality. I want to extract to Form Object but don't know how to do. I have search form which looks like this:
.row
= horizontal_simple_form_for :cars, {url: cars_path, method: :get} do |f|
.col-md-4
.row
.col-md-12
= f.input :handover_location, label: I18n.t('.handover'), collection: Location.all.map{|hl| [hl.location_address, hl.id]}
= f.input :return_location, label: I18n.t('.return') ,collection: Location.all.map{|rl| [rl.location_address, rl.id]}
= f.input :car_class, label: I18n.t('.car_class') ,collection: CarClass.all.map { |c| [c.name, c.id] }, include_blank: true
.col-md-4
= f.input :handover_date, as: :string, label: false
= f.input :return_date, as: :string, label: false
= f.submit class: 'btn btn-success'
Cars controller:
class CarsController < ApplicationController
skip_authorization_check
def index
#cars = Car.search(params)
end
def show
end
end
And class method in Car model which search correct cars:
def self.search(params)
self.joins(:reservations).where.not("reservations.reception_time <= ? AND reservations.return_time >= ?",
params[:cars][:return_date], params[:cars][:handover_date]).
joins(:car_class).where("car_classes.id= ?", params[:cars][:car_class])
.cars_at_both_locations(params[:cars][:handover_location], params[:cars][:return_location])
end
Now I'm trying to extract this to Form Object. I've created a file search_form.rb:
class SearchForm
include ActiveModel::Model
attr_accessor :handover_date, :return_date, :handover_location, :return_location, :car_class
end
But now I don't know how to handle my params to this form object. Thank's in advance.

Answer 1

I wish I could help you with the Form Object stuff, but I need to learn more about classes & modules
I can help you with the search functionality, as we've done it before here
Here's the code we used:
#View
<%= form_tag search_path, :method => :post, :id => "SearchForm" do %>
<%= text_field_tag :search, params[:search], placeholder: 'Search your favourite products or brands', :autocomplete => :off %>
<%= image_submit_tag 'nav_bar/search.png' %>
<% end %>
#config/routes.rb
match 'search(/:search)', :to => 'products#search', :as => :search, via: [:get, :post]
#app/controllers/products_controller.rb
def search
#products = Product.search(params[:search])
respond_to do |format|
format.js { render :partial => "elements/livesearch", :locals => {:search => #products, :query => params[:search]} }
format.html { render :index }
end
end
Notice the form_tag we used?
Simple form does not work with form_tag currently (it requires an object) - we just send the data with a GET request to the controller & that then sends the data to the Product model
I think your problem will be caused by the use of your SearchForm object. You only need this because your use of simple form means you have to pass an object. Problem being this is not necessary for search
A better way will be to use a standard form_tag, and send the request directly to your controller. This will allow you to process the data as params, which you'll be able to send directly to your Car model
--
I can write some code specific to you if you want

Answer 2

I found solution on my own.
Cars controller:
def index
#search_form = SearchForm.new(params[:search_form])
#cars = #search_form.submit(params[:search_form])
end
search_form.rb:
class SearchForm
include ActiveModel::Model
attr_accessor :handover_date, :return_date, :handover_location, :return_location, :car_class
def submit(params)
Car.search(params)
end
end
Search form in view:
.row
= horizontal_simple_form_for SearchForm.new, {url: cars_path, method: :get} do |f|
.col-md-4
.row
.col-md-12
= f.input :handover_location, label: I18n.t('.handover'), collection: Location.all.map{|hl| [hl.name, hl.id]}
= f.input :return_location, label: I18n.t('.return') ,collection: Location.all.map{|rl| [rl.name, rl.id]}
= f.input :car_class, label: I18n.t('.car_class') ,collection: CarClass.all.map { |c| [c.name, c.id] }, include_blank: true
.col-md-4
= f.input :handover_date, as: :string, label: false
= f.input :return_date, as: :string, label: false
= f.submit class: 'btn btn-success'
search method in car model:
def self.search(params)
self.joins(:reservations).where.not("reservations.reception_time <= ? AND reservations.return_time >= ?",
params[:return_date], params[:handover_date]).
joins(:car_class).where("car_classes.id= ?", params[:car_class])
.cars_at_both_locations(params[:handover_location], params[:return_location])
end