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
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