gardener.rb

class Gardener < ActiveRecord::Base
  belongs_to :group
  has_many :answers
  #has_and_belongs_to_many :questionnaires, join_table: 'gardener_questionnaires'
  #has_and_belongs_to_many :questionnaires, join_table: 'gardener_questionnaires'
  #has_many :answers, through: :gardener_questionnaires
  has_many :attendance_registers_training_sessions
  has_many :attendance_registers, through: :attendance_registers_training_sessions
  has_many :support_visits, dependent: :destroy
  has_one :garden, dependent: :destroy
  has_one :living_arrangement, dependent: :destroy
  has_one :sfl, dependent: :destroy
  has_one :education, dependent: :destroy
  has_one :employment, dependent: :destroy
  has_one :grant, dependent: :destroy
  has_one :ability, dependent: :destroy 
  has_one :experience, dependent: :destroy
  has_one :health, dependent: :destroy
  has_one :general_statement, dependent: :destroy
  has_one :expenditure, dependent: :destroy
  has_many :follow_up_visits
  #has_many :documents
 # has_attached_file :avatar, :styles => {:thumb => "100x100>"}
 # validates_attachment_content_type :avatar, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]
  has_attached_file :avatar, dependent: :destroy,
	:storage => :dropbox,
	:dropbox_credentials => "#{Rails.root}/config/dropbox.yml",
	:styles => { :medium => "300x300>", :thumb => "100x100>" },
	 :default_url => "/images/missing_pic.jpeg",
  	:dropbox_options => {       
	:path => proc { |style| "#{style}/#{id}_#{avatar.original_filename}"},       
	:unique_filename => true   
}
validates_attachment_content_type :avatar, :content_type => ["image/jpg", "image/jpeg", "image/png", "image/gif"]
validates :first_name, length: {minimum: 2, too_short: "First name needs at least 2 characters"}
validates :last_name , length: {minimum: 2, too_short: "Last name needs at least 2 characters"}
validates :contact_number, length: {minimum: 9, too_short: "Contact numbers need to have 10 characters", maximum: 11, too_long: "Contact numbers need to have 10 characters" }
validates :address , length: {minimum: 4, too_short: "Address needs at least 4 characters"}
validates :id_number, :length => { :is => 13, 
    :too_short => "must have at least %{count} words",
    :too_long  => "must have at most %{count} words"},
    :uniqueness => true
validates :race, :presence => true

  has_attached_file :resume, dependent: :destroy,
    :storage => :dropbox,
    :dropbox_credentials => "#{Rails.root}/config/dropbox.yml"
end
 
  #mount_uploader :image, ImageUploader

  def active?
    status == 'active'
  end

gardeners_controller.rb

class GardenersController < ApplicationController

 # GET /groups/:group_id/gardeners
  # GET /groups/:group_id/gardeners.xml
  def index
    #1st you retrieve the group thanks to params[:group_id]
    @group = Group.find(params[:group_id])
    #2nd you get all the gardeners of this group
    @gardeners = @group.gardeners.order("first_name")
    respond_to do |format|
        format.html # index.html.erb
        format.xml {remder :xml => @gardeners}
  end
  end

  def show
#1st you retrieve the group thanks to params[:group_id]
    @group = Group.find(params[:group_id])
#2nd you retrieve the comment thanks to params[:id]
    @gardener = @group.gardeners.find(params[:id])

    respond_to do |format|
      format.html # show.html.erb
      format.xml {render :xml => @gardener}
    end
  end

# GET /groups/:group_id/gardeners/new
# GET /groups/:group_id/gardeners/new.xml
  def new
    #1st you retrieve the group thanks to params[:group_id]
    @group= Group.find(params[:group_id])
    #2nd you build a new comment
    @gardener = @group.gardeners.build

    respond_to do |format|
      format.html #new.html.erb
      format.xml {render :xml => @gardener }
    end
  end

# GET /groups/:group_id/gardeners/:id/edit
  def edit
    #1st you retrieve the group thanks to params[:group_id]
    @group = Group.find(params[:group_id])
    #2nd you retrieve the comment thanks to params[:id]
    @gardener = @group.gardeners.find(params[:id])
  end

# POST /groups/:group_id/group_gardeners
# POST /groups/:group_id/group_gardeners.xml
  def create
    #1st you retrieve the group thanks to params[:group_id]
    @group = Group.find(params[:group_id])
    #2nd you create the trainer wih arguments in params [:gardener]
    @gardener = @group.gardeners.new(gardener_params)

    respond_to do |format|
      if @gardener.save
        #1st argument of redirect_to is an array, in order to build the correct route to the nested resource gardener
      format.html {redirect_to([@gardener.group], :notice => 'Home Gardener was successfully created' )}
      format.xml {render :xml => @gardener, :status => :created, :location => [@gardener.group,@gardener] }
      else
        format.html {render :action => "new"}
        format.xml {render :xml => @gardener.errors, status: :unprocessable_entity}
      end
    end
  end


  def update
    #1st you retrieve the group thanks to params[:group_id]
    @group = Group.find(params[:group_id])
    @gardener = @group.gardeners.find(params[:id])

    respond_to do |format|
      if @gardener.update_attributes(gardener_params)
        #1st argument of redirect_to is an array, in order to build the correct route to the nested resource gardener
     format.html {redirect_to([@gardener.group, @gardener], :notice => 'Gardener was successfully updated')}
     format.xml { head :ok}
      else
        format.html {render :action => "edit"}
        format.xml {render :xml => @gardener.errors, :status => :unprocessable_entity}
      end
    end
  end

  def destroy
    #1st you retrieve the group thanks to params[:group_id]
    @group= Group.find(params[:group_id])
    #2nd you retrieve the gardener thanks to params[:id]
    @gardener = @group.gardeners.find(params[:id])
    @gardener.destroy

    respond_to do |format|
      #1st argument reference the path /groups/:group_id/gardeners
      format.html {redirect_to(group_gardeners_url)}
      format.xml {head :ok}
    end
  end

  private

  def gardener_params
   params.require(:gardener).permit(:first_name, :race, :last_name, :contact_number, :address, :group_id, :garden_at_home, :document, :id_number, :avatar)
  end

  def group_params
  params.require(:group).permit(:name, :area, :group_id)
  end
end

logs.txt

Jul 17 02:24:57 sflforms app/web.1:  Processing by GardenersController#show as HTML 
Jul 17 02:24:57 sflforms app/web.1:  Started GET "/groups/22/gardeners/55" for 105.210.113.48 at 2015-07-17 09:24:57 +0000 
Jul 17 02:24:57 sflforms app/web.1:    Parameters: {"group_id"=>"22", "id"=>"55"} 
Jul 17 02:24:57 sflforms app/web.1:    Rendered gardeners/show.html.erb within layouts/application (14.9ms) 
Jul 17 02:24:57 sflforms app/web.1:  ActionView::Template::Error (wrong number of arguments (1 for 0)):  
Jul 17 02:24:57 sflforms app/web.1:      25:         <td><%= @gardener.address %></td> 
Jul 17 02:24:57 sflforms app/web.1:      26:         <td><%= @gardener.contact_number %></td> 
Jul 17 02:24:57 sflforms app/web.1:      27:         <% if @gardener.support_visits.exists? %> 
Jul 17 02:24:57 sflforms app/web.1:      28:         <td><%= @gardener.support_visits.count %> visit complted. Last visit was <%= @gardener.support_visits.last.created_at.to_s(:short) %> </td> 
Jul 17 02:24:57 sflforms app/web.1:      29:         <% end %> 
Jul 17 02:24:57 sflforms heroku/router:  at=info method=GET path="/groups/22/gardeners/55" host=sflforms.herokuapp.com request_id=fb70a8cd-f16e-48d8-b33c-5814b2b95a33 fwd="105.210.113.48" dyno=web.1 connect=1ms service=120ms status=500 bytes=1669 
Jul 17 02:24:57 sflforms app/web.1:      30:         <% if @gardener.follow_up_visits.exists? %> 
Jul 17 02:24:57 sflforms app/web.1:      31:           <td><%= @gardener.follow_up_visits.last.created_at.to_s(:short) %> </td> 
Jul 17 02:24:57 sflforms app/web.1:    app/views/gardeners/show.html.erb:28:in `to_s' 
Jul 17 02:24:57 sflforms app/web.1:    app/views/gardeners/show.html.erb:28:in 

show.html.erb

<div class="panel panel-default">
<strong>Home</strong>
</p>
<table class="table">
  <thead>
  <tr>
    <th> </th>
    <th> First Name </th>
    <th> Address</th>
    <th> Contact Number</th>
    <% if @gardener.support_visits.exists? %>
    <th> No. Support Visits & date </th>
    <% end %>
    <% if @gardener.follow_up_visits.exists? %>
    <th> Last Follow Up Visit </th>
     <% end %>


  </tr>
  </thead>
  <tbody>
      <tr>
        <td><%= image_tag @gardener.avatar.url(:thumb), :class => "img-circle" %></td>
        <td><%= @gardener.first_name %></td>
        <td><%= @gardener.address %></td>
        <td><%= @gardener.contact_number %></td>
        <% if @gardener.support_visits.exists? %>
        <td><%= @gardener.support_visits.count %> visit complted. Last visit was <%= @gardener.support_visits.last.created_at.to_s(:short) %> </td>
        <% end %>
        <% if @gardener.follow_up_visits.exists? %>
          <td><%= @gardener.follow_up_visits.last.created_at.to_s(:short) %> </td>
          <% end %>


        <td><%= link_to 'Edit', edit_group_gardener_path(@gardener.group, @gardener), class: "btn btn-sm btn-success" %></td>
        <% if @gardener.garden.nil? %>
          <%= link_to 'Begin Initial Questionnaire', new_group_gardener_garden_path(@gardener.group, @gardener), class: "btn btn-sm btn-success" %>
        <% end %>
        <%= link_to 'Record Support Visit', new_group_gardener_support_visit_path(@gardener.group, @gardener), class: "btn btn-sm btn-info" %>
          <%= link_to 'Begin Follow Up Visit', new_follow_up_visit_path(:gardener_id => @gardener.id), class: "btn btn-sm btn-success" %>
      </tr>
  </tbody>
</table>

<%= link_to 'Back', groups_path, class: "btn btn-sm btn-danger" %> 

</div>