Embedded expressions in ERB

rubyonrails-talk
1

I'm stuck in trying to get an embedded expression in ERB.

I'm trying to put @post into @httppost. However when I print @httppost I get (notice the @post): {"aps": {"badge": 1, "alert", #{@post}}, "sound": "cat.caf", "device_tokens": ["455ab1b23cbfd97b7d2ef90a49d222e40f4c6c9b2570e84ff94fe4afeea12345"]}

It should say: {"aps": {"badge": 1, "alert", "This is a test"}, "sound": "cat.caf", "device_tokens": ["455ab1b23cbfd97b7d2ef90a49d222e40f4c6c9b2570e84ff94fe4afeea12345"]}

I put everything in my view to make it easier to troubleshoot:

<% @post = params[:post] %>

post params: <%= @post %>

<br />

<% @httppost = '{"aps": {"badge": 1, "alert", "#{@post}"}, "sound": "cat.caf", "device_tokens": ["455ab1b23cbfd97b7d2ef90a49d222e40f4c6c9b2570e84ff94fe4afeea12345"]}' %>

<%= @httppost %>

You can see the enclosed screen capture to see what my results are. Thanks in advance.

Attachments: http://www.ruby-forum.com/attachment/4535/Screen_shot_2010-03-04_at_4.24.40_PM.png

2

I'm stuck in trying to get an embedded expression in ERB.

I'm trying to put @post into @httppost. However when I print @httppost I get (notice the @post): {"aps": {"badge": 1, "alert", #{@post}}, "sound": "cat.caf", "device_tokens": ["455ab1b23cbfd97b7d2ef90a49d222e40f4c6c9b2570e84ff94fe4afeea12345"]}

It should say: {"aps": {"badge": 1, "alert", "This is a test"}, "sound": "cat.caf", "device_tokens": ["455ab1b23cbfd97b7d2ef90a49d222e40f4c6c9b2570e84ff94fe4afeea12345"]}

I put everything in my view to make it easier to troubleshoot:

<% @post = params[:post] %>

post params: <%= @post %>

<br />

<% @httppost = '{"aps": {"badge": 1, "alert", "#{@post}"}, "sound": "cat.caf", "device_tokens": ["455ab1b23cbfd97b7d2ef90a49d222e40f4c6c9b2570e84ff94fe4afeea12345"]}' %>

You've got it wrapped in single quotes... which won't interpolate. You want double quotes... or in your case since you've got a lot of double quotes you probably don't want to escape... use the %Q method...

<% @httppost = %Q!{"aps": {"badge": 1, "alert", "#{@post}"}, "sound": "cat.caf", "device_tokens": ["455ab1b23cbfd97b7d2ef90a49d222e40f4c6c9b2570e84ff94fe4afeea12345"]}!

The '!' can be whatever you want (I think) so pick something that isn't in your string. If it's paired (ie %Q{...}) use the opening/closing keys.

-philip

3

Philip,

Thanks a lot! This really helped me!

-A

Philip Hallstrom wrote: