paperclip gem upload not working in rails 4 multipart form

Question

I'm trying to setup a basic form with the ability to upload a picture, a title and a body of text. I'm using the paperclip 4.2.1 gem and rails 4.2.0.

The form shows up fine, I'm able to type in a title, some body text and select a picture. However, when I submit the form, it skips the show method and goes back to the index page and the image does not get uploaded to the database.

When I submit the form with only the title and body text, it does display in the show method. I did verify the source code of the form page shows "enctype="multipart/form-data". Does anyone know what im missing??

schema.rb

ActiveRecord::Schema.define(version: 20150310181944) do

create_table "articles", force: :cascade do |t|
    t.string   "title"
    t.text     "text"
    t.datetime "created_at",         null: false
    t.datetime "updated_at",         null: false
    t.string   "image_file_name"
    t.string   "image_content_type"
    t.integer  "image_file_size"
    t.datetime "image_updated_at"
  end

end

Model --> article.rb

class Article < ActiveRecord::Base


  has_attached_file :image
  validates_attachment_content_type :image, content_type: /\Aimage\/.*\Z/

end

View --> new.html.erb

New Article

<%= form_for @article, html: { multipart: true } do |f| %>
  <p>
    <%= f.label :title %><br>
    <%= f.text_field :title %>
  </p>

  <p>
    <%= f.label :text %><br>
    <%= f.text_area :text %>
  </p>
    <p>
    <%= f.label :image %>
    <%= f.file_field :image %>  

    </p>
  <p>
    <%= f.submit %>
  </p>
<% end %>

<%= link_to 'Back', articles_path %>

view -> index.html.erb

<h1>Listing articles</h1>


<%= link_to 'New article', new_article_path %> 
<table>
  <tr>
    <th>Title</th>
    <th>Text</th>
    <th>Image</th>
  </tr>

 <% @articles.each do |article| %>
    <tr>
      <td><%= article.title %></td>
      <td><%= article.text %></td>
      <td><%= image_tag article.image.url %></td>
    </tr>
  <% end %>
</table>

view -> show.html.erb

<p>
  <strong>Title:</strong>
  <%= @article.title %>
</p>

<p>
  <strong>Text:</strong>
  <%= @article.text %>
</p>

<p>

    <%= image_tag @article.image.url %>
</p>


<%= link_to 'Back', articles_path %>

Controller --> articles_controller.rb

class ArticlesController < ApplicationController

def index
  @articles = Article.all
end

def show
  @article = Article.find(params[:id])
end


def new
  @article = Article.new
end


def create
  @article = Article.create(article_params)

  @article.save
  redirect_to @article

end

private
  def article_params
    params.require(:article).permit(:title, :text, :image)
  end

end

I'm very new to ruby and programming in general, so it's probably some type somewhere but I've been searching for days and I'm not sure why the picture wont upload.

Answer 1

You have a typical validation error in create method. Just change Article.create to Article.create! and you will see error and backtrace. It will help you to investigate and fix problem.