File Uploding coding problems

Rails
1

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

Name:
<%= text_field "person", "name" %>

Picture:

#################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

2

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

The message is pretty clear: params doesn’t exist here. It only exists
inside an instance of controller. You need to pass params through to
the save method (which you’re already doing, but not using it for some
reason.).

Fred

3

Frederick C. wrote:

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

The message is pretty clear: params doesn’t exist here. It only exists
inside an instance of controller. You need to pass params through to
the save method (which you’re already doing, but not using it for some
reason.).

Fred

thanks a lot man. now i saw where i had done the coding wrongly. thanks
a lot for showing the mistake i was doing.