CODEWITHSUNDEEP
ruby-on-railsruby-on-rails-4base64paperclip
Avi Kaminetzky
Avi Kaminetzky

Reputation: 1538

Upload base64 Image with Paperclip - Rails 4

I am relatively new to Rails and would appreciate any help.

My website accepts a signature image in base64 format and I am trying to use a Paperclip adaptor to decode the image and save it to my form model as the :signature attribute. I am using the advice given here (and here) which advises to use the following code:

In model:

class Thing
    has_attached_file :image

In controller:

def create
  image = Paperclip.io_adapters.for(params[:thumbnail_data]) 
  image.original_filename = "something.gif"
  Thing.create!(image: image)
  ...
end

My assumption is that Thing.create! is setting the value of Paperclip's model attribute :image to be the value of the image variable whilst creating and saving a new Thing object. I tried to implement the same code in my FormsController (create action) before @form.save, but am receiving this error:

undefined method `before_image_post_process' for #<Class:0x007f94a2a26de8>

My FormsController:

class FormsController < ApplicationController
  before_action :logged_in_user
  before_action :admin_user, only: :destroy

  def index
    @forms = Form.all #paginate
  end

  def show
    @form = Form.find(params[:id])
  end

  def new
    @form = Form.new
  end

  def create
    @form = Form.new(form_params)

    # Paperclip adaptor 
    signature = Paperclip.io_adapters.for(params[:base64])
    signature.original_filename = "something.png"

    # Attempt to submit image through Paperclip
    @form.signature = signature

    if @form.save
      flash[:success] = "The form has been successfully created!"
      redirect_to @form
    else
      render 'new'
    end
  end

  def edit
    @form = Form.find(params[:id])
  end

  def update
    @form = Form.find(params[:id])
    if @form.update_attributes(form_params)
      flash[:success] = "Form has been updated!"
      redirect_to @form
    else
      render 'edit'
    end
  end

  def destroy
    Form.find(params[:id]).destroy
    flash[:success] = "Form deleted"
    redirect_to forms_path
  end

  private

  def form_params
    params.require(:form).permit(:first_name, :last_name, :email, :phone, :address, :member_type, :base64)
  end
end

This is my Form model:

class Form < ActiveRecord::Base

  has_attached_file :signature
  validates_attachment_content_type :image, :content_type =>     ["image/jpg", "image/jpeg", "image/png", "image/gif"]

 end

Upvotes: 2

Views: 3476

Answers (1)

smathy
smathy

Reputation: 27961

Assuming that you're using the Rails form helpers over in your view, and based on your form_params list, the :base64 key won't be at the top level of your params hash, but rather one level down at params[:form][:base64]

Upvotes: 1

Related Questions