Robert Guss

Thanks Chris! Between you and some friendly SO folks I got it working. You sir are the man.

Cheers.

Hi Chris,

Let me first say thank you so much for getting back to me at all, let alone so fast! I am a big fan and love your videos and you have helped me a ton. I also just subscribed ;)

So I implemented your code and we are so close. The association works, however the 'code' field is an object in memory and looks like #<ActionDispatch::Http::UploadedFile:0x007fca7d9c8098> I also have this open on Stack Overflow and have received some good feedback as well. The codes are located here code_params[:code]. So when I upload my csv with several codes, I would like it to bring it all of them into their own rows each with the software ID assigned.

Also my csv file is a single column with a header of 'code' without quotes. Followed by 10 rows with unique serials like 111-222-333, etc. Just for testing.

Thanks again for all your help and keep up the great work! Cheers.

I am building a rails application that associates serial #'s with software titles. For instance, I have a software title, and need to be able to upload batches of serial #'s(codes) and associate it with that specific software title. It needs to be simple enough for a user(authenticated) to click an upload link, select a software title from a dropdown and hit import. Here is what I have so far... It does not necessarily have to be a csv it could be a text file too. I just need help figuring out the best way to accomplish this.

Code Upload UI

Code 'form' for UI

<%= simple_form_for(@code) do |f| %>
  <%= f.error_notification %>

  <div class="form-inputs">
    <%= f.association :software %>
    <%= f.input :label %>
    <%= f.input :code %>
  </div>

  <div class="form-actions">
    <%= f.file_field :code %>
    <br>
    <%= f.button :submit, "Upload Codes", class: 'btn btn-warning' %>
  </div>
  <br>
<% end %>

Code.rb Model

class Code < ActiveRecord::Base
  belongs_to :software
  belongs_to :user
  accepts_nested_attributes_for :software

  def self.import(file)
    CSV.foreach(file.path, headers: true) do |row|
      Code.create! row.to_hash
    end
  end
end

Software.rb Model

class Software < ActiveRecord::Base
  has_many :software_assigns
  has_many :products, through: :software_assigns
  has_many :software_downloads
  has_many :codes
end

Codes Controller

class CodesController < ApplicationController
  before_action :authenticate_user!
  before_action :verify_admin
  before_action :set_code, only: [:show, :edit, :update, :destroy]

  # GET /codes
  # GET /codes.json
  def index
    @codes = Code.all
  end

  # GET /codes/1
  # GET /codes/1.json
  def show
  end

  # GET /codes/new
  def new
    @code = Code.new
  end

  # GET /codes/1/edit
  def edit
  end

  # POST /codes
  # POST /codes.json
  def create
    @code = Code.new(code_params)

    respond_to do |format|
      if @code.save
        format.html { redirect_to @code, notice: 'Codes were successfully created.' }
      else
        format.html { render :new }
      end
    end
  end

  # PATCH/PUT /codes/1
  # PATCH/PUT /codes/1.json
  def update
    respond_to do |format|
      if @code.update(code_params)
        format.html { redirect_to @code, notice: 'Codes were successfully updated.' }
      else
        format.html { render :edit }
      end
    end
  end

  # DELETE /codes/1
  # DELETE /codes/1.json
  def destroy
    @code.destroy
    respond_to do |format|
      format.html { redirect_to codes_url, notice: 'Codes were successfully destroyed.' }
    end
  end

  def import
    Code.import(params[:file])
    redirect_to codes_path, notice: 'Codes were successfully uploaded!'
  end

  private
    # Use callbacks to share common setup or constraints between actions.
    def set_code
      @code = Code.find(params[:id])
    end

    # Never trust parameters from the scary internet, only allow the white list through.
    def code_params
      params.require(:code).permit(:software_id, :label, :code)
    end
end