Rails Paperclip upload button not working - ruby-on-rails

Question

I try to integrate Paperclip to my Web App. The problem is, that the upload button is not working. I can choose a file, enter a title etc. but when i hit on upload nothing happens.
when i remove in the _form.html.erb file the
<%= form_for #video, url: videos_path, html: { multipart: true } do |form| %>
<%= form.file_field :image %>
<% end %>
the upload button is working again, but again, without the paperclip attachment.
Any ideas how to fix this?
_form.html.erb File
<div class="container">
<%= form_for(#video) do |f| %>
<% if #video.errors.any? %>
<div id="error_explanation">
<h2><%= pluralize(#video.errors.count, "error") %> prohibited this video from being saved:</h2>
<ul>
<% #video.errors.full_messages.each do |message| %>
<li><%= message %></li>
<% end %>
</ul>
</div>
<% end %>
<div class="field">
<%= f.label :jwPlayer %><br>
<%= f.text_field :jwPlayer %>
</div>
<div class="field">
<%= f.label :description %><br>
<%= f.text_area :description %>
</div>
<div class="field">
<%= f.label :title %><br>
<%= f.text_area :title %>
</div>
<%= form_for #video, url: videos_path, html: { multipart: true } do |form| %>
<%= form.file_field :image %>
<% end %>
<div class="actions">
<%= f.submit %>
</div>
<% end %>
</div>
Video_controller
class VideosController < ApplicationController
before_action :set_video, only: [:show, :edit, :update, :destroy]
# GET /videos
# GET /videos.json
def index
#videos = Video.all
end
# GET /videos/1
# GET /videos/1.json
def show
end
# GET /videos/new
def new
#video = Video.new
end
# GET /videos/1/edit
def edit
end
# POST /videos
# POST /videos.json
def create
#video = Video.new(video_params)
respond_to do |format|
if #video.save
format.html { redirect_to #video, notice: 'Video was successfully created.' }
format.json { render :show, status: :created, location: #video }
else
format.html { render :new }
format.json { render json: #video.errors, status: :unprocessable_entity }
end
end
end
# PATCH/PUT /videos/1
# PATCH/PUT /videos/1.json
def update
respond_to do |format|
if #video.update(video_params)
format.html { redirect_to #video, notice: 'Video was successfully updated.' }
format.json { render :show, status: :ok, location: #video }
else
format.html { render :edit }
format.json { render json: #video.errors, status: :unprocessable_entity }
end
end
end
# DELETE /videos/1
# DELETE /videos/1.json
def destroy
#video.destroy
respond_to do |format|
format.html { redirect_to videos_url, notice: 'Video was successfully destroyed.' }
format.json { head :no_content }
end
end
private
# Use callbacks to share common setup or constraints between actions.
def set_video
#video = Video.find(params[:id])
end
# Never trust parameters from the scary internet, only allow the white list through.
def video_params
params.require(:video).permit(:jwPlayer, :description, :title, :image)
end
end
Video.rb
class Video < ActiveRecord::Base
has_attached_file :image, styles: { medium: "300x300>", thumb: "100x100>" }
validates_attachment_content_type :image, content_type: /\Aimage\/.*\z/
end

Answer 1

You have to change your code.
Add this to your code:
<%= f.file_field :image %>
instead of this:
<%= form_for #video, url: videos_path, html: { multipart: true } do |form| %>
<%= form.file_field :image %>
<% end %>