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December 7, 2008 02:10
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using Paperclip for multiple attachments and displaying them using the method described in Advanced Rails Recipe #13
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| <div class="asset"> | |
| <% new_or_existing = asset.new_record? ? 'new' : 'existing' %> | |
| <% prefix = "page[#{new_or_existing}_asset_attributes][]" %> | |
| <% fields_for prefix, asset do |asset_form| -%> | |
| <p> | |
| Asset: <%= asset_form.file_field :file %> | |
| <%= link_to_function "remove", "$(this).up('.asset').remove()" %> | |
| </p> | |
| <% end -%> | |
| </div> |
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| <%= error_messages_for :page %> | |
| <% form_for @page, :html => { :multipart => true } do |f| %> | |
| <p> | |
| <%= f.label :name %><br /> | |
| <%= f.text_field :name %> | |
| </p> | |
| <p> | |
| <%= f.label :permalink %><br /> | |
| <%= f.text_field :permalink %> | |
| </p> | |
| <p> | |
| <%= f.label :content %><br /> | |
| <%= f.text_area :content %> | |
| </p> | |
| <div id="assets"> | |
| Attach a file or image<br /> | |
| <%= render :partial => 'asset', :collection => @page.assets %> | |
| </div> | |
| <p> | |
| <%= add_asset_link "Add a file" %> | |
| </p> | |
| <p> | |
| <%= f.submit button_name %> | |
| </p> | |
| <% end %> | |
| <%= link_to 'Cancel', pages_path %> |
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| class Asset < ActiveRecord::Base | |
| belongs_to :page | |
| has_attached_file :file, :styles => { :medium => "300x300>", :thumb => "100x100>" } | |
| end |
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| <%= render :partial => 'shared/edit_side_nav', :locals => { :obj => @page } %> | |
| <h1>Editing page</h1> | |
| <%= render :partial => 'form', :locals => { :page => @page, :button_name => 'Update' } %> |
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| <h1>New page</h1> | |
| <%= render :partial => 'form', :locals => { :page => @page, :button_name => 'Create' } %> |
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| class Page < ActiveRecord::Base | |
| has_many :assets, :dependent => :destroy | |
| validates_associated :assets | |
| validates_presence_of :name, :permalink | |
| after_update :save_assets | |
| def new_asset_attributes=(asset_attributes) | |
| asset_attributes.each do |attributes| | |
| assets.build(attributes) | |
| end | |
| end | |
| def existing_asset_attributes=(asset_attributes) | |
| assets.reject(&:new_record?).each do |asset| | |
| attributes = asset_attributes[asset.id.to_s] | |
| if attributes | |
| asset.attributes = attributes | |
| else | |
| asset.delete(asset) | |
| end | |
| end | |
| end | |
| def save_assets | |
| assets.each do |asset| | |
| asset.save(false) | |
| end | |
| end | |
| end |
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| class PagesController < ApplicationController | |
| before_filter :login_required, :except => [ :show ] | |
| # GET /pages | |
| # GET /pages.xml | |
| def index | |
| @pages = Page.find(:all) | |
| respond_to do |format| | |
| format.html # index.html.erb | |
| format.xml { render :xml => @pages } | |
| end | |
| end | |
| # GET /pages/1 | |
| # GET /pages/1.xml | |
| def show | |
| if params[:permalink] | |
| @page = Page.find_by_permalink(params[:permalink]) | |
| raise ActiveRecord::RecordNotFound, "Page not found." if @page.nil? | |
| respond_to do |format| | |
| format.html # show.html.erb | |
| format.xml { render :xml => @page } | |
| end | |
| else | |
| @page = Page.find(params[:id]) | |
| respond_to do |format| | |
| format.html # show.html.erb | |
| format.xml { render :xml => @page } | |
| end | |
| end | |
| end | |
| # GET /pages/new | |
| # GET /pages/new.xml | |
| def new | |
| @page = Page.new | |
| @page.assets.build | |
| respond_to do |format| | |
| format.html # new.html.erb | |
| format.xml { render :xml => @page } | |
| end | |
| end | |
| # GET /pages/1/edit | |
| def edit | |
| @page = Page.find(params[:id]) | |
| end | |
| # POST /pages | |
| # POST /pages.xml | |
| def create | |
| @page = Page.new(params[:page]) | |
| respond_to do |format| | |
| if @page.save | |
| flash[:notice] = 'Page was successfully created.' | |
| format.html { redirect_to(@page) } | |
| format.xml { render :xml => @page, :status => :created, :location => @page } | |
| else | |
| format.html { render :action => "new" } | |
| format.xml { render :xml => @page.errors, :status => :unprocessable_entity } | |
| end | |
| end | |
| end | |
| # PUT /pages/1 | |
| # PUT /pages/1.xml | |
| def update | |
| params[:page][:existing_asset_attributes] ||= {} | |
| @page = Page.find(params[:id]) | |
| respond_to do |format| | |
| if @page.update_attributes(params[:page]) | |
| flash[:notice] = 'Page was successfully updated.' | |
| format.html { redirect_to(@page) } | |
| format.xml { head :ok } | |
| else | |
| format.html { render :action => "edit" } | |
| format.xml { render :xml => @page.errors, :status => :unprocessable_entity } | |
| end | |
| end | |
| end | |
| # DELETE /pages/1 | |
| # DELETE /pages/1.xml | |
| def destroy | |
| @page = Page.find(params[:id]) | |
| @page.destroy | |
| respond_to do |format| | |
| format.html { redirect_to(pages_url) } | |
| format.xml { head :ok } | |
| end | |
| end | |
| end |
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| create_table "assets", :force => true do |t| | |
| t.string "name" | |
| t.text "description" | |
| t.datetime "created_at" | |
| t.datetime "updated_at" | |
| t.string "file_file_name" | |
| t.string "file_content_type" | |
| t.integer "file_file_size" | |
| t.datetime "file_updated_at" | |
| t.integer "page_id" | |
| end | |
| create_table "pages", :force => true do |t| | |
| t.string "name" | |
| t.string "permalink" | |
| t.text "content" | |
| t.datetime "created_at" | |
| t.datetime "updated_at" | |
| end |
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Looks good, but missing the strong parameters in the PageController. Also, link_to_function is being deprecated/removed (or already is in 4.1?), and it should be asset.save(:validate => false).