Greetings.
I am trying to create an image upload page for my site, and I am having a little trouble figuring out how to set things up correctly. I have a model for user's, each with a unique ID, and I would like to have it so that when an image (i'm calling them artworks at the moment) is uploaded it is saved to /somedir/<userid>/ <imageid>.<extension> The trouble is I can't figure out how to pass the user ID info to rails so it will be saved in the image model. My code looks something like this:
# artwork migration def self.up create_table :artworks do |t| t.column :title, :string t.column :media, :string t.column :description, :string t.column :user_id, :integer # foreign key to users table t.column :uploaded_at, :datetime t.column :file_path, :string t.column :file_name, :string t.column :content_type, :string end end
# upload template <h1>Upload an artwork!</h1>
<% form_for(:artwork, :url => { :action => :upload }, :html => { :multipart => true }) do |form| %> Title: <%= form.text_field("title", { :size => 20, :maxlength => 100 }) %><br /> Media: <%= form.text_field("media", { :size => 20, :maxlength => 100 }) %><br /> Description: <%= form.text_area("description", { :cols => 60, :rows => 40 })%><br /> Select File to Upload: <%= form.file_field("uploaded_file") %><br />
<%= submit_tag("Upload") %> <% end %>
# controller def upload logger.debug("running upload")
# Create an empty artwork to display in the form for GET/POST logger.debug("make a new Artwork") @artwork = Artwork.new(params[:artwork])
# If something was submitted logger.debug("check for POST") if request.post? # If the save is successful, redisplay the page with a blank artwork for next submit logger.debug("save to DB") if @artwork.save @artwork = Artwork.new flash[:notice] = "Artwork Uploaded Successfully" end end end
# Model for Artwork class Artwork < ActiveRecord::Base belongs_to :user
def uploaded_file=(incomming_file) logger.debug("running uploaded_file=")
@temp_file = incomming_file @content_type = incomming_file.content_type.chomp @file_path = MEDIA_FOLDER + @user_id + '/' # **** error here @file_name = @id + "." + @content_type end
def after_save # called after a successful ActiveRecord save if @temp_file logger.debug("creating dir (if needed) '#{@file_path}'") File.makedirs @file_path logger.debug("saveing to file '#{@file_name}'") File.open("#{@file_path}#{file_name}", "wb+") do |f| f.write(@temp_file.read) end end end
def after_destroy if File.exist?("#{@file_path}#{file_name}") File.delete("#{@file_path}#{file_name}") end end end
When I run this code, I get an error at the line in the model above that @user_id is nil and can't converted to a String. I know I need to somehow get the current user's ID stored in the new artwork object, but I can't figure out how. I have it stored in the session hash when a user is logged in. I tried putting a hidden filed in the template like this:
<%= form.hidden_field("user_id", { :value => "#{@current_user_id}" }) %>
Where @current_user_id is grabs the id from the session, but same error.
I tried assigning the value in the controller just before calling @artwork = Artwork.new(params[:artwork]), but this seems to overwrite that value.
I tried accessing the session from within the model, but it looks like it's not in scope for that code. Any help would be appreciated.
Thanks, Matthew