Rails 3 migration stories?

[Greg Campbell]

Now that the Rails 3 beta is out, I'm curious to hear if people are
starting to test out migrating from Merb apps. Any strategies or
"gotchas" worth discussing?

[Jacques Crocker]

Updating one of my apps at the moment.

I'm currently porting merb-helpers to run ontop of Rails3. I'll still have to update all my controllers and routes, but at least maybe I can reuse my views.

Will keep you posted.

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[Jacques Crocker]

Scratch that. merb-helpers probably isn't portable to Rails 3. Why? My
first big disappointment with Rails 3 is they kept the horrendously
bad view helper idiom of:

<% form do %>
...
<% end %>

My favorite feature of merb was that helpers just returned a string
(and not crazy hacks using concat and buffers). Similar to:

<%= form do %>
...
<% end =%>

Writing reusable view helpers with rails is a nightmare, and I don't
see that changing in Rails 3.

I could have sworn I saw Yehuda's blog post that he found a way to
make <%= some_helper do %> <% end %> work in Rails3. Not sure why it
got removed. Here's the post
http://yehudakatz.com/2009/08/31/simplifying-rails-block-helpers-with-a-side-of-rubinius/

I dunno, maybe its still possible and I'm just missing something. I'll
keep investigating.

[Paul Dlug]

I haven't followed the Rails 3 development that closely, at this
point, are there any compelling reasons to motivate a migration from
Merb to Rails 3?

--Paul

[MarkMT]

> are there any compelling reasons to motivate a migration from
> Merb to Rails 3?

Would be great if Yehuda were to drop in and comment.

[Yehuda Katz]

Jacques,

Unfortunately, the built-in ERB engine didn't get updated for 3.0. It's close to the top of my list for 3.1. Thankfully, that needn't post any major problem for migration.

Specifically, you can make a :merb template engine with the BlockAwareEnhancer applied and then just make your merb helpers foo.html.merb.

Yehuda Katz
Developer | Engine Yard
(ph) 718.877.1325

[Jacques Crocker]

Cool, I'll give that a try. Thanks for the tip.

[Jeff Pollard]

Jacques,

When you do that, please post the instructions somewhere :)

Thanks,

-J