options_for_select default selection breaks under passenger - ruby-on-rails-3

Question

I have the following code that works perfectly in my devl (local) environment, but breaks under passenger (production):
<select name="acp[acp_type]">
<%= options_for_select ([["Standalone",0] ,["Public", 1],["Private", 2],["Both", 3]],#acp.acp_type) %>
</select>
In development, it generates a dropdown list and selects whatever is in #acp.acp_type. In production there is a Template error (see below). If I remove the ,#acp.acp_type it works fine, but I don't get the value selected.
Here is my gem list (this matches development exactly other than the passenger-related gems):
abstract (1.0.0)
actionmailer (3.0.4)
actionpack (3.0.4)
activemodel (3.0.4)
activerecord (3.0.4)
activeresource (3.0.4)
activesupport (3.0.4)
arel (2.0.10)
attributes (5.0.1)
builder (2.1.2)
bundler (1.0.18)
daemon_controller (1.0.0)
erubis (2.6.6)
factory_girl (2.0.5)
factory_girl_rails (1.1.0)
fastthread (1.0.7)
i18n (0.6.0, 0.5.0)
jquery-rails (1.0.16)
mail (2.2.19)
mime-types (1.16)
mysql (2.8.1)
mysql2 (0.2.13)
passenger (3.0.11)
polyglot (0.3.2)
prototype (2.0.0)
rack (1.2.3)
rack-cache (1.1)
rack-mount (0.6.14)
rack-test (0.5.7)
rails (3.0.4)
railties (3.0.4)
rake (0.9.2)
rdoc (3.9.4)
rvm (1.9.2)
thor (0.14.6)
treetop (1.4.10)
tzinfo (0.3.29)
uuidtools (2.1.2)
will_paginate (3.0.2)
And the error is:
ActionView::Template::Error (/var/www/html/tpdemo/app/views/acps/_form.html.erb:19: syntax error, unexpected ',', expecting ')'
...Both", 3]],#acp.acp_type) );#output_buff...
... ^
/var/www/html/tpdemo/app/views/acps/_form.html.erb:19: syntax error, unexpected ')', expecting keyword_end
...Both", 3]],#acp.acp_type) );#output_buffer.safe_concat('
... ^):
18: <select name="acp[acp_type]">
19: <%= options_for_select ([["Standalone",0] ,["Public", 1],["Private", 2],["Both", 3]],#acp.acp_type) %>
20: </select>
21: </div>
22:

Answer 1

So the code looks fine, but it's very unlikely that Passenger is the culprit -- more likely the data on your other server is different -- perhaps #acp.acp_type is nil. (I think #acp is not nil, as otherwise I think you would get a nil error). Another explanation is that the data schema is outdated -- did you just add this field and still need to run a migration?