Passing Ruby var as Javascript Parameter

Question

I want to pass a ruby var as a javascript function param in a Rails checkbox, like this:

<%= check_box_tag 'Sugestão', prato.id , prato.sugestao,:class => prato.categoria_pratos_id, :id => "task-check3",:onchange =>"checkbox('<%=prato.categoria_pratos_id%>')"  %>

I have the Javascript checkbox Function working fine. But i need to pass the id as the param... It just gives me application error if i do that

And by the way, you have erb interpolation in erb interpolation, while you just need "checkbox('#{prato.categoria_pratos_id}')" — souslov
– souslov, Commented Jun 3, 2016 at 14:59

venkatKA · Accepted Answer · 2016-06-08 18:29:13Z

3

It's because what you're giving within <%= %> is Ruby. You don't have to use the notation again while passing your parameter. Simply use :onchange => "checkbox('#{your_id}')"

edited Jun 8, 2016 at 18:29

answered Jun 3, 2016 at 15:00

venkatKA

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2 Comments

Boltz0r Over a year ago

what if i want to send 2 parameters?

venkatKA Over a year ago

"checkbox('#{param1}', '#{param2}')"

souslov · Accepted Answer · 2016-06-03 15:03:08Z

1

You have erb interpolation within erb interpolation, while you just need to interpolate ruby variable in a ruby string :

onchange: "checkbox('#{prato.categoria_pratos_id}')"

answered Jun 3, 2016 at 15:03

souslov

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1 Comment

Boltz0r Over a year ago

what if i want to send 2 parameters?

noumena · Accepted Answer · 2016-06-03 15:01:43Z

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You can't use <%= %> within <%=%>. Instead, use #{} for the within. Like ...('#{prato.id}')...

answered Jun 3, 2016 at 15:01

noumena

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2 Comments

Boltz0r Over a year ago

how do i send 2 parameters?

noumena Over a year ago

The same: ('#{something}', '#{another}')

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