adding ransack filter and sorting to volunteers index

app/controllers/volunteers_controller.rb

@@ -4,8 +4,9 @@ class VolunteersController < ApplicationController
   before_action :set_state, only: [:update]
 
   def index
-    @q = Volunteer.ransack(params[:q])
-    @volunteers = @q.result(distinct: true)
+    ransack_params = params[:q] || {}
+    @q = Volunteer.ransack(ransack_params)
+    @volunteers = @q.result
   end
 
   def show; end
@@ -61,7 +62,7 @@ class VolunteersController < ApplicationController
   end
 
   def filter_params
-    params.require(:volunteer).permit(:q)
+    params.require(:volunteer).permit(:commit, q: [:gender, :state])
   end
 
   def volunteer_params

app/views/volunteers/_volunteer.html.slim

 tr
   td = volunteer.full_name
-  td = volunteer.date_of_birth
+  td = l(volunteer.date_of_birth) if volunteer.date_of_birth.present?
   td = country(volunteer.nationality)
-  td = volunteer.created_at
+  td = l(volunteer.created_at)
   td = t("gender.#{volunteer.gender}") unless volunteer.gender.blank?
   td = t("simple_form.options.volunteer.state.#{volunteer.state}")
   td = link_to t_action(:show), volunteer

app/views/volunteers/index.html.slim

 .row
   .col-xs-12
     h1= t('volunteers')
-
+.row
+  = search_form_for @q, builder: SimpleForm::FormBuilder do |f|
+    .col-xs-6.col-md-3
+      = f.input :state_cont, collection: Volunteer.state_collection,
+        include_blank: true, html: {class: 'input-group input-group-sm' }, input_html: { onchange: 'this.form.submit();', class: 'input-group input-group-xs' }
 .row
   .col-xs-12
   table.table.table-striped
     thead
       tr
-        th= t_attr(:full_name)
+        th= sort_link @q, :full_name
         th= sort_link @q, :date_of_birth
-        th= t_attr(:nationality)
+        th= sort_link @q, :nationality
         th= sort_link @q, :created_at
         th= sort_link @q, :gender
         th= sort_link @q, :state

config/application.rb

 require_relative 'boot'
-
+require File.expand_path('../boot', __FILE__)
+ENV['RANSACK_FORM_BUILDER'] = '::SimpleForm::FormBuilder'
 require 'rails/all'
 
 # Require the gems listed in Gemfile, including any gems

config/locales/de.yml

@@ -117,6 +117,7 @@ de:
         training: Bildung
         woman: Frau
         zip: Postleitzahl
+        created_at: Erstellt am
     errors:
       models:
         profile:
@@ -378,6 +379,8 @@ de:
         region: In welcher Region können Sie sich Ihren Einsatz vorstellen?
         skills: Berufliche Kompetenzen, die Sie einbringen könnten?
         strengths: Wo sehen Sie Ihre Stärken? (soziale Kompetenzen, die Sie in FW-Arbeit einbringen könnten)
+      q:
+        state_cont: Status
     "no": 'Nein'
     options:
       client:
@@ -433,6 +436,13 @@ de:
           registered: interessiert / angemeldet
           rejected: Absage
           reserved: kontaktiert / für Gespräch eingeladen
+      q:
+        state_cont:
+          active: aktiv / im Einsatz
+          finished: ausgetreten
+          registered: interessiert / angemeldet
+          rejected: Absage
+          reserved: kontaktiert / für Gespräch eingeladen
     placeholders:
     required:
       mark: '*'
@@ -452,6 +462,8 @@ de:
   thank_you: "Vielen Dank \U0001F389"
   time:
     formats:
+      default:
+        "%d. %B %Y %H:%M"
       devise:
         mailer:
           invitation_instructions:

config/locales/en.yml

@@ -61,6 +61,10 @@ en:
   crud:
     title:
       add: 'Add %{model}'
+  datetime:
+    formats:
+      default:
+        '%s %B %Y'
   date:
     formats:
       default: