Passing parameter in a Ruby function from HTML

Question

I have two files. .rb (with Ruby code) and .erb(HTML file with some ruby script). I am calling a Ruby function in .rb from .erb.

.erb

<a href="<%= url_for :action => :showProducts(i) %>">Click here</a>

.rb

def showProducts(param)

//Some code

end

I am able to call a function without passing parameters to it. But as and when I pass parameters to function and then call it, I receive an error. I know this is the incorrect way to call a parametrized function from .erb. What is the correct way of calling a parameterized function from HTML?

Looks like your syntax is correct. What's not working? What errors are you getting? — Marnen Laibow-Koser
– Marnen Laibow-Koser, Commented Nov 15, 2011 at 15:10
Then you'll find more details in the log. What does that say? — Marnen Laibow-Koser
– Marnen Laibow-Koser, Commented Nov 16, 2011 at 4:24
When I try debugging, control doesn't go inside the function. (I tried with solution below but still no success). — Nitish
– Nitish, Commented Nov 16, 2011 at 4:37
Yes, and as I asked in the previous question, what does the log say? Not the debugger -- the log? — Marnen Laibow-Koser
– Marnen Laibow-Koser, Commented Nov 16, 2011 at 4:39

Alex Peattie · Accepted Answer · 2011-11-15 15:40:47Z

1

If you add in another key/value pair to the hash in url_for

<%= url_for :action => :showProducts, :product => "toaster" %>

Your URL should go from, say, http://localhost:3000/showProducts to http://localhost:3000/showProducts?product=toaster

Here, we're adding parameters to the GET request. To access these parameters in the controller we use the params hash. For example to get the product (toaster):

params[:product] #=> "toaster"

answered Nov 15, 2011 at 15:40

Alex Peattie

27.8k5 gold badges52 silver badges52 bronze badges

Sign up to request clarification or add additional context in comments.

Comments

Nitish · Accepted Answer · 2011-11-16 12:29:11Z

1

I found the solution to my problem :

<a href="<%= url_for :action => :showProducts, :id=> 'Hello' %>">

.rb function:

def showProducts(param)

//Some code

end

answered Nov 16, 2011 at 12:29

Nitish

14.1k31 gold badges142 silver badges271 bronze badges

Comments

demongolem · Accepted Answer · 2013-08-23 13:51:58Z

0

I found the solution

def showProducts 

 @params['product']

end

edited Aug 23, 2013 at 13:51

demongolem

9,75436 gold badges97 silver badges107 bronze badges

answered Aug 23, 2013 at 13:32

MaNaSu

491 bronze badge

Collectives™ on Stack Overflow

Passing parameter in a Ruby function from HTML

3 Answers 3

Comments

Comments

Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

3 Answers 3

Comments

Comments

Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related