Ara's main gem: validation with error message

Ruby
1

Hi,

This request should probably be addressed directly to Ara but maybe
others may have other ideas, so

Using Ara’s main, I have something like the following,

Main do
argument :user do
required
description “name or userid”
validate{|user| check1(user)}
validate{|user| check2(user,child)}
validate{|user| check3(user,parent)}
end

def run
p params[:user].value
end
end

Currently, i only get one validation message like,

invalid: argument(user)="botp"

It would be nice if i could specify/add an (optional) error message for
each validation, like eg

validate("user does not exist"){|user| check1(user)}
validate("user must have child"){|user| check2(user,child)}
validate("user need parent"){|user| check3(user,parent)}

Are you there, Ara? :wink:

Sorry for your time, Ara, as i’m fond of your main gem.
Thank you for main.

kind regards -botp

2

On Fri, Feb 29, 2008 at 9:53 PM, Peña, Botp [email protected]
wrote:

validate{|user| check1(user)}

Currently, i only get one validation message like,

Are you there, Ara? :wink:

Sorry for your time, Ara, as i’m fond of your main gem.
Thank you for main.

kind regards -botp

one idea:

cfp2:~ > cat a.rb
require ‘main’

Main do
argument(:user) do
required
description ‘name or userid’

message = 'YOU CAN USE A CLOSURE'

validate do |user|
  if user == 'foo'
    message = 'message one'
    return false
  end

  if user == 'bar'
    message = 'message two'
    return false
  end

  true
end

error{ STDERR.puts message }

end

def run
p param[:user].value
end
end

cfp2:~ > ruby a.rb foo
message one

cfp2:~ > ruby a.rb bar
message two

cfp2:~ > ruby a.rb foobar
“foobar”

3

From: ara.t.howard [mailto:[email protected]]

message = ‘YOU CAN USE A CLOSURE’

validate do |user|

if user == ‘foo’

message = ‘message one’

return false

would it be possible to merge those last two lines? maybe something like
raise_error ‘message one’ which then flags an error and sends the
‘message one’ to error(). see below question

end

if user == ‘bar’

message = ‘message two’

return false

end

true

end

error{ STDERR.puts message }

standard format of error is error{|msg| …}, how do i set an error
message so that error can capture it and i can just generically call
error{|msg| p msg}. no var declaration/tracking needed ie

kind regards -botp