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POTwo questions on paperclip with multiple uploads
 

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  1. POTwo questions on paperclip with multiple uploads
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    <p>I'm making a task for a job. Rails 4 app where users can create posters. Posters can have multiple images to upload. Actually, I have no explicit errors, just two questions. But before questions, here are my files. Poster.rb:</p> <pre><code>class Poster &lt; ActiveRecord::Base has_many :poster_images, dependent: :destroy accepts_nested_attributes_for :poster_images, allow_destroy: true belongs_to :type belongs_to :user default_scope -&gt; { order('created_at DESC') } validates :title, :body, :publish_date, :user_id, :presence =&gt; true end </code></pre> <p>poster_image.rb:</p> <pre><code>class PosterImage &lt; ActiveRecord::Base belongs_to :poster has_attached_file :image, :styles =&gt; {:medium =&gt; "300x300&gt;", :thumb =&gt; "100x100&gt;" } end </code></pre> <p>posters_controller.rb:</p> <pre><code>class PostersController &lt; ApplicationController before_filter :set_poster, only: [:show, :edit, :update, :destroy] before_filter :authenticate_user!, :except =&gt; [:index, :show] authorize_resource load_resource except: :create # GET /posters # GET /posters.json def index @posters = Poster.paginate(page: params[:page], :per_page =&gt; 10) end # GET /posters/1 # GET /posters/1.json def show end # GET /posters/new def new end # GET /posters/1/edit def edit end # POST /posters # POST /posters.json def create @poster = Poster.new(poster_params) @poster.user_id = current_user.id respond_to do |format| if @poster.save format.html { redirect_to @poster, notice: 'Poster was successfully created.' } format.json { render action: 'show', status: :created, location: @poster } else format.html { render action: 'new' } format.json { render json: @poster.errors, status: :unprocessable_entity } end end end # PATCH/PUT /posters/1 # PATCH/PUT /posters/1.json def update respond_to do |format| if @poster.update(poster_params) format.html { redirect_to @poster, notice: 'Poster was successfully updated.' } format.json { head :no_content } else format.html { render action: 'edit' } format.json { render json: @poster.errors, status: :unprocessable_entity } end end end # DELETE /posters/1 # DELETE /posters/1.json def destroy @poster.destroy respond_to do |format| format.html { redirect_to posters_url } format.json { head :no_content } end end private # Use callbacks to share common setup or constraints between actions. def set_poster @poster = Poster.find(params[:id]) end # Never trust parameters from the scary internet, only allow the white list through. def poster_params params.require(:poster).permit(:title, :body, :publish_date, :type_id, :type_name, poster_images_attributes: :image ) end end </code></pre> <p>_form.html.erb: </p> <pre><code>&lt;%= simple_nested_form_for @poster, :html =&gt; {:multipart =&gt; true } do |f| %&gt; &lt;%= f.input :title, :autofocus =&gt; true %&gt; &lt;%= f.input :body %&gt; &lt;%= f.input :publish_date %&gt; &lt;%= f.input :type_id, :collection =&gt; Type.all, required: true %&gt; &lt;%= f.fields_for :poster_images do |images_f| %&gt; &lt;%= images_f.file_field :image %&gt; &lt;%= images_f.link_to_remove "X" %&gt; &lt;% end %&gt; &lt;%= f.link_to_add "Add image", :poster_images %&gt; &lt;div class="form-actions"&gt; &lt;%= f.button :submit, :class =&gt; 'btn-primary' %&gt; &lt;%= link_to t('.cancel', :default =&gt; t("helpers.links.cancel")), posters_path, :class =&gt; 'btn' %&gt; &lt;/div&gt; &lt;% end %&gt; </code></pre> <p>show.html.erb:</p> <pre><code>&lt;%- model_class = Poster -%&gt; &lt;div class="page-header"&gt; &lt;h1&gt;&lt;%=t '.title', :default =&gt; model_class.model_name.human.titleize %&gt;&lt;/h1&gt; &lt;/div&gt; &lt;dl class="dl-horizontal"&gt; &lt;dd&gt;&lt;h3&gt;&lt;%= @poster.title %&gt;&lt;/h3&gt;&lt;/dd&gt; &lt;dd&gt;&lt;%= @poster.body %&gt;&lt;/dd&gt; &lt;dt&gt;&lt;strong&gt;&lt;%= model_class.human_attribute_name(:publish_date) %&gt;:&lt;/strong&gt;&lt;/dt&gt; &lt;dd&gt;&lt;%= @poster.publish_date %&gt;&lt;/dd&gt; &lt;dt&gt;&lt;strong&gt;Author:&lt;/strong&gt;&lt;/dt&gt; &lt;dd&gt;&lt;%= link_to @poster.user.name, @poster.user %&gt;&lt;/dd&gt; &lt;dt&gt;&lt;strong&gt;Type:&lt;/strong&gt;&lt;/dt&gt; &lt;dd&gt;&lt;%= @poster.type.name %&gt;&lt;/dd&gt; &lt;/dl&gt; &lt;dt&gt;&lt;strong&gt;Image(s):&lt;/strong&gt;&lt;/dt&gt; &lt;% @poster.poster_images.each do |p| %&gt; &lt;%= content_tag "p_#{p.id}" do %&gt; &lt;%= image_tag p.image.url(:medium) %&gt; &lt;% end %&gt; &lt;% end %&gt; &lt;div class="form-actions"&gt; &lt;%= link_to t('.back', :default =&gt; t("helpers.links.back")), posters_path, :class =&gt; 'btn' %&gt; &lt;% if current_user &amp;&amp; (current_user.has_role?(:admin) || current_user.id==@poster.user_id) %&gt; &lt;% if can? :update, Poster %&gt; &lt;%= link_to t('.edit', :default =&gt; t("helpers.links.edit")), edit_poster_path(@poster), :class =&gt; 'btn' %&gt; &lt;% end %&gt; &lt;%= link_to t('.destroy', :default =&gt; t("helpers.links.destroy")), poster_path(@poster), :method =&gt; 'delete', :data =&gt; { :confirm =&gt; t('.confirm', :default =&gt; t("helpers.links.confirm", :default =&gt; 'Are you sure?')) }, :class =&gt; 'btn btn-danger' %&gt; &lt;% end %&gt; &lt;/div&gt; </code></pre> <p>And now two my questions:</p> <ol> <li><p>When I'm creating the poster, everything goes great. But when I'm trying to update my poster and push "edit", my form is coming in and I see all the fields that I had when I was creating poster. But if while CREATING poster I added a pic, when I see EDIT form, I have opened link for adding a pic. And if I use it, it's ok, but when I just edit my Name,for example, and save it without adding new pic, my "show.html.erb" shows me my previous pic and a sign of "broken" image after it. If I had two images, while updating poster, rails is trying to make me to add two more images or adds two broken-image signs itself. Any ideas?(if you understood what you've read above)</p></li> <li><p>The person who is checking my app says that I forgot to add some keys in my "poster_images_attributes: :image" in the controller in "poster_params". I found here, in SOF, that it should be enough, but he says that it's enough for creating poster, but not for edit and delete actions. Any ideas what else should I write in poster_params? Thanks</p></li> </ol>
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