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Michael M.

2007-Jul-11 21:42 UTC

read params

hi.

I am a rails newbie.

I have am Model user with name and email. How can I acces and modify the
param email before user.save?

<% form_for :user do |f| -%>
  <p><label for="name">Username:</label><br/>
  <%= f.text_field :name %></p>

  <p><label for="email">Email</label><br/>
  <%= f.text_field :email %></p>

  <p><%= submit_tag ''add User'' %></p>
<%end  -%>



def new
  @user = User.new(params[:user])
  return unless request.post?
    if @user.save
      redirect_to(:action => ''index'')
   end
end

thanks
xinu

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Javier Godinez

2007-Jul-11 21:59 UTC

head link

Re: read params

If what you want is to verify that the email is unique/valid, put
these two lines in your model.

  validates_format_of :email, :with =>
/^([^@\s]+)@((?:[-a-z0-9]+\.)+[a-z]{2,})$/i, :message => "Invalid
email"
  validates_presence_of  :email

If you really want to modify whatever the user passed in, you can do
something like this:
  params[:user][:email] =
"some-HMywgCz3680N+BqQ9rBEUg@public.gmane.org"

-javier godinez

On 7/11/07, Michael M.
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
> hi.
>
> I am a rails newbie.
>
> I have am Model user with name and email. How can I acces and modify the
> param email before user.save?
>
> <% form_for :user do |f| -%>
>   <p><label
for="name">Username:</label><br/>
>   <%= f.text_field :name %></p>
>
>   <p><label
for="email">Email</label><br/>
>   <%= f.text_field :email %></p>
>
>   <p><%= submit_tag ''add User'' %></p>
> <%end  -%>
>
>
>
> def new
>   @user = User.new(params[:user])
>   return unless request.post?
>     if @user.save
>       redirect_to(:action => ''index'')
>    end
> end
>
> thanks
> xinu
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Michael M.

2007-Jul-11 22:07 UTC

head link

Re: read params

...> If you really want to modify whatever the user passed in, you can do
> something like this:
>   params[:user][:email] =
"some-HMywgCz3680N+BqQ9rBEUg@public.gmane.org"
> 
> -javier godinez
if I try this I receive following error message:

NoMethodError in UserController#new
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.[]
RAILS_ROOT: script/../config/..
Application Trace | Framework Trace | Full Trace
app/controllers/user_controller.rb:8:in `new''

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Javier Godinez

2007-Jul-11 22:48 UTC

head link

Re: read params

What does your controller look like?

On 7/11/07, Michael M.
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
> ...
> > If you really want to modify whatever the user passed in, you can do
> > something like this:
> >   params[:user][:email] =
"some-HMywgCz3680N+BqQ9rBEUg@public.gmane.org"
> >
> > -javier godinez
>
> if I try this I receive following error message:
>
> NoMethodError in UserController#new
> 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.[]>
> RAILS_ROOT: script/../config/..
> Application Trace | Framework Trace | Full Trace
> app/controllers/user_controller.rb:8:in `new''
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Javier Godinez

2007-Jul-11 22:51 UTC

head link

Re: read params

xinu,

def new
# ...
end

Goes in your controller!


On 7/11/07, Michael M.
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
> ...
> > If you really want to modify whatever the user passed in, you can do
> > something like this:
> >   params[:user][:email] =
"some-HMywgCz3680N+BqQ9rBEUg@public.gmane.org"
> >
> > -javier godinez
>
> if I try this I receive following error message:
>
> NoMethodError in UserController#new
> 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.[]>
> RAILS_ROOT: script/../config/..
> Application Trace | Framework Trace | Full Trace
> app/controllers/user_controller.rb:8:in `new''
>
> --
> Posted via http://www.ruby-forum.com/.
>
> >
>
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Michael M.

2007-Jul-12 05:54 UTC

head link

Re: read params

this is my controller.

class UserController < ApplicationController

  def index
  end

  def new
    @user = User.new(params[:user])
    return unless request.post?
      if @user.save
      redirect_to(:action => ''index'')
    end
  end

  def edit
  end

  def list
  end

end

it works, but when I add the line @user.name = params[:user][:email] I 
receive the error message.

puts params[:user].inspect
{"name"=>"abc",
"email"=>"abc-gJEnWOaiUB4@public.gmane.org"}

I thing the problem is I, cannt read 
"email"=>"abc-gJEnWOaiUB4@public.gmane.org" with
params[:user][:email]






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Shai Rosenfeld

2007-Jul-12 08:36 UTC

head link

Re: read params

> I thing the problem is I, cannt read 
"email"=>"abc-gJEnWOaiUB4@public.gmane.org" with
> params[:user][:email]
what happens when you use

params[''user''][''email'']

(i.e, String rather Symbol)
?

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Mark Reginald James

2007-Jul-12 10:03 UTC

head link

Re: read params

Michael M. wrote:> this is my controller.
> 
> class UserController < ApplicationController
> 
>   def index
>   end
> 
>   def new
>     @user = User.new(params[:user])
>     return unless request.post?
>       if @user.save
>       redirect_to(:action => ''index'')
>     end
>   end
> 
>   def edit
>   end
> 
>   def list
>   end
> 
> end
> 
> it works, but when I add the line @user.name = params[:user][:email] I 
> receive the error message.
> 
> puts params[:user].inspect
> {"name"=>"abc",
"email"=>"abc-gJEnWOaiUB4@public.gmane.org"}
> 
> I thing the problem is I, cannt read 
"email"=>"abc-gJEnWOaiUB4@public.gmane.org" with
> params[:user][:email]
You''ve got to make sure you only access params[:user][:email]
on a post, because params[:user] will be nil on a get, and
you''ll get an error.


-- 
We develop, watch us RoR, in numbers too big to ignore.


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Prashanth

2007-Jul-12 10:56 UTC

head link

Re: read params

On 7/12/07, Michael M.
<rails-mailing-list-ARtvInVfO7ksV2N9l4h3zg@public.gmane.org>
wrote:>
> this is my controller.
>
> class UserController < ApplicationController
>
>   def index
>   end
>
>   def new
>     @user = User.new(params[:user])
>     return unless request.post?
>       if @user.save
>       redirect_to(:action => ''index'')
>     end
>   end
>
>
I think you are trying to access both the user and the email and store
in the user table right? if that is the case you can do something like
this User.new("user" => params[:user], email => params[:email]).

-- 
regards,

|Prashanth|

http://munichlinux.blogspot.com

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Roberto Gattinoni

2007-Jul-12 13:08 UTC

head link

Re: read params

Michael M. wrote:> hi.
> 
> I am a rails newbie.
> 
> I have am Model user with name and email. How can I acces and modify the
> param email before user.save?
> 
> <% form_for :user do |f| -%>
>   <p><label
for="name">Username:</label><br/>
>   <%= f.text_field :name %></p>
> 
>   <p><label
for="email">Email</label><br/>
>   <%= f.text_field :email %></p>
> 
>   <p><%= submit_tag ''add User'' %></p>
 > <%end  -%>> 
> 
> 
> def new
>   @user = User.new(params[:user])
>   return unless request.post?
>     if @user.save
>       redirect_to(:action => ''index'')
>    end
> end
> 
> thanks
> xinu
Just to be sure that the problem doesn''t come from another side could 
you correct redirect_to into:

                 redirect_to(:action => ''index'') and return

(you must be sure not to have a double rendering in your flow, one from 
the redirect_to and the other at the end of the method which defaults to 
a

                    render :action => ''new''
)

Don''t know if it can help.

Roberto Gattinoni.

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Michael M.

2007-Jul-12 17:06 UTC

head link

Re: read params

Mark Reginald James wrote:> 
> You''ve got to make sure you only access params[:user][:email]
> on a post, because params[:user] will be nil on a get, and
> you''ll get an error.
> Thanks to all for your help.
If i move the line "return unless request.post? " to the top of the 
function it works well.

def new
  return unless request.post?    #moved to here
   @user = User.new(params[:user])
   if @user.save
   redirect_to(:action => ''index'') and return
end

Thanks!
Michael

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