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comp.lang.ruby

File Uploading codes

Nadeesha Meththananda

11/13/2007 11:02:00 AM


I used the following codes found in the net to use to write a file to
upload the files. down are the codes i have used. but still i did not
able to get the correct coding. so if somebody know where i have gone
wrong pls reply.


###################### IN the View #############################3
<form action="create" method="post" enctype="multipart/form-data">
<p>
<b>Name:</b><br />
<%= text_field "person", "name" %>
</p>

<p>
<b>Picture:</b><br />
<input type="file" name="person[picture]" />
</p>

<p><input type="submit" name="Save" /></p>
</form>



#################The controller:##########################

class AddressbookController < ApplicationController
def new
# not really needed since the template doesn't rely on any data
end

def create
post = Post.save(@params["person"])
# Doesn't this mean post is a File object?
# post.id is a bad idea in this case...

redirect_to :action => "show", :id => post.id
end
end



######### the model ###################

class Post < ActiveRecord::Base
def self.save(person)
f = File.new("pictures/#{person['name']}/picture.jpg", "wb")
f.write params[:picture].read
f.close
end


in the uploading it gives a error like this

undefined local variable or method `params' for Post:Class


so i did some modification as
f.write params[:picture].read
line to
f.write (@params[:picture].read)



so the code woke properly, but still it gives a error saying

You have a nil object when you didn't expect it!
You might have expected an instance of Array.
The error occurred while evaluating nil.[]




SO IF SOMEBODY KNOW HOW TO OVER COME THIS PROBLEM PLS REPLY
--
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2 Answers

Alex Young

11/13/2007 11:19:00 AM

0

Nadeesha Meththananda wrote:
<snip>
> ######### the model ###################
>
> class Post < ActiveRecord::Base
> def self.save(person)
> f = File.new("pictures/#{person['name']}/picture.jpg", "wb")
> f.write params[:picture].read
You'll probably get a better response over on the Rails list, but I
suspect this is your problem - the params hash isn't in scope in
ActiveRecord descendants. You should have more luck if you define your
method as def self.save(person, picture), and call it in you controller
as Post.save(params[:person], params[:picture]).

<snip>
> SO IF SOMEBODY KNOW HOW TO OVER COME THIS PROBLEM PLS REPLY
NO NEED TO SHOUT! :-)

--
Alex

Nadeesha Meththananda

11/13/2007 11:38:00 AM

0



Hi Alex Young

Thanks a lot for the advice.....

thanks a lot

:) :) :) :) :) :) :)
--
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