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debalmoto

2010-Oct-25 00:14 UTC

Create super-simple adding application

Hello people, rails noob here,
I am trying to create an extremely simple addition application by
having two text boxes allow users to put in any numbers, press a
button, and get them added together. This is my first attempted
application by myself, so I am probably making lots of simple
mistakes.

So far I have this in the view:

<%= text_field_tag :number_one %>
<%= text_field_tag :number_two %>

I have tried to call params[:number_one], and params[:number_two] in
my controller, but I get an error. A short bit of code showing what my
controller should look like would be great thanks!

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Frederick Cheung

2010-Oct-25 09:03 UTC

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Re: Create super-simple adding application

On Oct 25, 1:14 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> So far I have this in the view:
>
> <%= text_field_tag :number_one %>
> <%= text_field_tag :number_two %>
>
> I have tried to call params[:number_one], and params[:number_two] in
> my controller, but I get an error.
What error?

Fred

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debalmoto

2010-Oct-26 01:16 UTC

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Re: Create super-simple adding application

Anytime I put params[:number_one] or two in my controller and start
the server up I get this error on my page:

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

On Oct 25, 5:03 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On Oct 25, 1:14 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > So far I have this in the view:
>
> > <%= text_field_tag :number_one %>
> > <%= text_field_tag :number_two %>
>
> > I have tried to call params[:number_one], and params[:number_two] in
> > my controller, but I get an error.
>
> What error?
>
> Fred
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debalmoto

2010-Oct-26 01:18 UTC

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Re: Create super-simple adding application

Anytime I put params[:number_one] or two in my controller I get this
error on my page:

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

On Oct 25, 5:03 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On Oct 25, 1:14 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > So far I have this in the view:
>
> > <%= text_field_tag :number_one %>
> > <%= text_field_tag :number_two %>
>
> > I have tried to call params[:number_one], and params[:number_two] in
> > my controller, but I get an error.
>
> What error?
>
> Fred
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debalmoto

2010-Oct-26 02:18 UTC

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Re: Create super-simple adding application

Ok, so I figured out what was causing the error, I wasnt calling
params[:number_one] in the right place. Fixing this took care of the
error. Now I can call them in my controller like so:

@a = params[:number_one].to_i
@b = params[:number_one].to_i
@sum = @a + @b

But when I put numbers in my text boxes, it always shows 0. I even put
this is my view:

<p><%= params[:number_one].to_i + params[:number_two].to_i
%></p>

And it also always shows 0. What am I doing wrong?

On Oct 25, 9:18 pm, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Anytime I put params[:number_one] or two in my controller I get this
> error on my page:
>
> undefined local variable or method `params'' for
> ApplicationController:Class
>
> On Oct 25, 5:03 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>
> > On Oct 25, 1:14 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > So far I have this in the view:
>
> > > <%= text_field_tag :number_one %>
> > > <%= text_field_tag :number_two %>
>
> > > I have tried to call params[:number_one], and params[:number_two]
in
> > > my controller, but I get an error.
>
> > What error?
>
> > Fred
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Frederick Cheung

2010-Oct-26 08:32 UTC

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Re: Create super-simple adding application

On Oct 26, 3:18 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> Ok, so I figured out what was causing the error, I wasnt calling
> params[:number_one] in the right place. Fixing this took care of the
> error. Now I can call them in my controller like so:
>
> @a = params[:number_one].to_i
> @b = params[:number_one].to_i
> @sum = @a + @b
>
> But when I put numbers in my text boxes, it always shows 0. I even put
> this is my view:
>
> <p><%= params[:number_one].to_i + params[:number_two].to_i
%></p>
>
> And it also always shows 0. What am I doing wrong?
>
I''d check the development.log file to see what parameters are actually
getting submitted.

Fred

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debalmoto

2010-Oct-26 19:56 UTC

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Re: Create super-simple adding application

It doesn''t say any numbers, the relevant log info just says it
processed the GET and got the layout.

On Oct 26, 4:32 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On Oct 26, 3:18 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > Ok, so I figured out what was causing the error, I wasnt calling
> > params[:number_one] in the right place. Fixing this took care of the
> > error. Now I can call them in my controller like so:
>
> > @a = params[:number_one].to_i
> > @b = params[:number_one].to_i
> > @sum = @a + @b
>
> > But when I put numbers in my text boxes, it always shows 0. I even put
> > this is my view:
>
> > <p><%= params[:number_one].to_i + params[:number_two].to_i
%></p>
>
> > And it also always shows 0. What am I doing wrong?
>
> I''d check the development.log file to see what parameters are
actually
> getting submitted.
>
> Fred
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Frederick Cheung

2010-Oct-26 21:40 UTC

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Re: Create super-simple adding application

On 26 Oct, 20:56, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> It doesn''t say any numbers, the relevant log info just says it
> processed the GET and got the layout.
>Sounds like the parameters aren''t getting sent
What does the rest of the view with the form look like?

Fred> On Oct 26, 4:32 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>
>
>
> > On Oct 26, 3:18 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > Ok, so I figured out what was causing the error, I wasnt calling
> > > params[:number_one] in the right place. Fixing this took care of
the
> > > error. Now I can call them in my controller like so:
>
> > > @a = params[:number_one].to_i
> > > @b = params[:number_one].to_i
> > > @sum = @a + @b
>
> > > But when I put numbers in my text boxes, it always shows 0. I
even put
> > > this is my view:
>
> > > <p><%= params[:number_one].to_i +
params[:number_two].to_i %></p>
>
> > > And it also always shows 0. What am I doing wrong?
>
> > I''d check the development.log file to see what parameters are
actually
> > getting submitted.
>
> > Fred
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debalmoto

2010-Oct-26 21:48 UTC

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Re: Create super-simple adding application

<p>
	<%= text_field_tag(:number_one, value = 0)  %>
	<%= text_field_tag(:number_two, value = 0)  %>
</p>
<p>
	<%= @sum %>
</p>

That''s all of it.

My controller:

class UserController < ApplicationController
  def home
    a = params[:number_one].to_i
    b = params[:number_one].to_i
    @sum = a + b
  end
end

On Oct 26, 5:40 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> On 26 Oct, 20:56, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> It
doesn''t say any numbers, the relevant log info just says it
> > processed the GET and got the layout.
>
> Sounds like the parameters aren''t getting sent
> What does the rest of the view with the form look like?
>
> Fred
>
> > On Oct 26, 4:32 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > wrote:
>
> > > On Oct 26, 3:18 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > > Ok, so I figured out what was causing the error, I wasnt
calling
> > > > params[:number_one] in the right place. Fixing this took
care of the
> > > > error. Now I can call them in my controller like so:
>
> > > > @a = params[:number_one].to_i
> > > > @b = params[:number_one].to_i
> > > > @sum = @a + @b
>
> > > > But when I put numbers in my text boxes, it always shows 0.
I even put
> > > > this is my view:
>
> > > > <p><%= params[:number_one].to_i +
params[:number_two].to_i %></p>
>
> > > > And it also always shows 0. What am I doing wrong?
>
> > > I''d check the development.log file to see what
parameters are actually
> > > getting submitted.
>
> > > Fred
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Frederick Cheung

2010-Oct-27 05:10 UTC

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Re: Create super-simple adding application

On Oct 26, 10:48 pm, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
wrote:> <p>
>         <%= text_field_tag(:number_one, value = 0)  %>
>         <%= text_field_tag(:number_two, value = 0)  %>
> </p>
> <p>
>         <%= @sum %>
> </p>
>
> That''s all of it.
Time for HTML lesson 1: if you want inputs to get sent to the server,
they need to be enclosed in a form (modulo javascript trickery).

Fred
>
> My controller:
>
> class UserController < ApplicationController
>   def home
>     a = params[:number_one].to_i
>     b = params[:number_one].to_i
>     @sum = a + b
>   end
> end
>
> On Oct 26, 5:40 pm, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> wrote:
>
>
>
> > On 26 Oct, 20:56, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:> It
doesn''t say any numbers, the relevant log info just says it
> > > processed the GET and got the layout.
>
> > Sounds like the parameters aren''t getting sent
> > What does the rest of the view with the form look like?
>
> > Fred
>
> > > On Oct 26, 4:32 am, Frederick Cheung
<frederick.che...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
> > > wrote:
>
> > > > On Oct 26, 3:18 am, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>
> > > > > Ok, so I figured out what was causing the error, I
wasnt calling
> > > > > params[:number_one] in the right place. Fixing this
took care of the
> > > > > error. Now I can call them in my controller like so:
>
> > > > > @a = params[:number_one].to_i
> > > > > @b = params[:number_one].to_i
> > > > > @sum = @a + @b
>
> > > > > But when I put numbers in my text boxes, it always
shows 0. I even put
> > > > > this is my view:
>
> > > > > <p><%= params[:number_one].to_i +
params[:number_two].to_i %></p>
>
> > > > > And it also always shows 0. What am I doing wrong?
>
> > > > I''d check the development.log file to see what
parameters are actually
> > > > getting submitted.
>
> > > > Fred
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Eric R.

2010-Oct-27 05:30 UTC

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Re: Create super-simple adding application

Frederick Cheung wrote in post #957392:> On Oct 26, 10:48pm, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
>> <p>
>>     <%= text_field_tag(:number_one, value = 0) %>
>>     <%= text_field_tag(:number_two, value = 0) %>
>> </p>
>> <p>
>>     <%= @sum %>
>> </p>
>>
>> That''s all of it.
>
> Time for HTML lesson 1: if you want inputs to get sent to the server,
> they need to be enclosed in a form (modulo javascript trickery).
>
> Fred
Exactly.

So you may want to change the view code to look like this:

  <%= form_tag(''/'') do -%>
<p>
  <%= text_field_tag(:number_one, value = 0)  %>
  <%= text_field_tag(:number_two, value = 0)  %>
  <%= submit_tag ''Calculate'' %>
</p>
  <% end %>
<p>
  <%= @sum %>
</p>

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debalmoto

2010-Oct-27 21:11 UTC

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Re: Create super-simple adding application

Thank you guys so much for your help. I think I have everything
working now. It must be frustrating dealing with such simple issues.
Just one more question: Did you intend to put the " - "  in  
<%form_tag(''/'') do -%> ? I removed it and it
didn''t seem to change
anything.

Thanks again for the help.

On Oct 27, 1:30 am, "Eric R."
<li...-fsXkhYbjdPsEEoCn2XhGlw@public.gmane.org>
wrote:> Frederick Cheung wrote in post #957392:
>
> > On Oct 26, 10:48pm, debalmoto
<debalm...-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org> wrote:
> >> <p>
> >>     <%= text_field_tag(:number_one, value = 0) %>
> >>     <%= text_field_tag(:number_two, value = 0) %>
> >> </p>
> >> <p>
> >>     <%= @sum %>
> >> </p>
>
> >> That''s all of it.
>
> > Time for HTML lesson 1: if you want inputs to get sent to the server,
> > they need to be enclosed in a form (modulo javascript trickery).
>
> > Fred
>
> Exactly.
>
> So you may want to change the view code to look like this:
>
>   <%= form_tag(''/'') do -%>
> <p>
>   <%= text_field_tag(:number_one, value = 0)  %>
>   <%= text_field_tag(:number_two, value = 0)  %>
>   <%= submit_tag ''Calculate'' %>
> </p>
>   <% end %>
> <p>
>   <%= @sum %>
> </p>
>
> --
> Posted viahttp://www.ruby-forum.com/.
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Rails - Oct 2010 - Create super-simple adding application

Create super-simple adding application

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