From: Mark Hubbart <discord@...>
Date: 2004-02-14T07:12:37+09:00
Subject: Re: cgi params in ruby


On Feb 13, 2004, at 1:14 PM, Cere Davis wrote:

> Hi Rubiers,
>
>
> I can't figure out a way to make the following code do what I want:

interestingly enough, I was just working on that same problem this 
morning :)

It looks like there is one error, and one unecessary complication. 
First, you don't need to convert the cgi.params to an array. You can 
use it as a hash just fine. Second, the CGI methods like #text_field 
don't print their result, they return them. So, since you are using 
Array#each, the value of the statement is... the array itself.
Instead, you need to use #map and join the results:

>
> #!/usr/bin/ruby1.8  -w
>
> require 'cgi'
>
> cgi=CGI.new("html3")
> cgi.out() do
> cgi.html() do
> cgi.body() do
>     cgi.form("get")  do
>
       # use Hash#map(), which passes keys and values
>     cgi.params.map {|key, val|
>         cgi.text_field(key, val.to_s) +
>         cgi.br
>     }.join + # and join the result before moving on
>     cgi.submit("Okey Dokey?")
>
>     end
> end
> end
> end
>
> So say I post in something this when I run the script on the command 
> line:
>
>
> (offline mode: enter name=value pairs on standard input)
> lname=davis;fname=cere
Note that you get this error here because #each returns an array, and 
you are trying to add a string to it:
> ../t.cgi:15:in `+': cannot convert String into Array (TypeError)
> 	from ./t.cgi:15
> 	from ./t.cgi:9:in `form'
> 	from ./t.cgi:9
> 	from ./t.cgi:8:in `body'
> 	from ./t.cgi:8
> 	from ./t.cgi:7:in `html'
> 	from /usr/lib/ruby/1.8/cgi.rb:1678:in `html'
> 	from /usr/lib/ruby/1.8/cgi.rb:1678:in `html'
> 	from ./t.cgi:7
> 	from ./t.cgi:6:in `out'
> 	from ./t.cgi:6
>
>
> What I want to happen is for the cgi script to print the lname and 
> fname into two text_field boxes but I am having trouble tracing 
> through this error.  Can anyone help?

HTH,
Mark