Heroku RoR app not working after adding activeadmin gem

Question

My RoR app was working fine on heroku until I added the activeadmin gem, and now when I push it to heroku, I get a page like this:

Application Error
An error occurred in the application and your page could not be served. Please try again in a few moments.

If you are the application owner, check your logs for details.

The heroku logs command only gives me...

2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x515546]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x519499]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_ary_each+0x45) [0x533735]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: [NOTE]
2012-04-14T21:25:32+00:00 app[web.1]: 
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby() [0x51307f]
2012-04-14T21:25:32+00:00 app[web.1]: /usr/local/bin/ruby(rb_yield+0x66) [0x521d56]
2012-04-14T21:25:32+00:00 app[web.1]: 
2012-04-14T21:25:32+00:00 app[web.1]: You may have encountered a bug in the Ruby interpreter or extension libraries.
2012-04-14T21:25:32+00:00 app[web.1]: Bug reports are welcome.
2012-04-14T21:25:32+00:00 app[web.1]: For details: http://www.ruby-lang.org/bugreport.html
2012-04-14T21:25:33+00:00 heroku[web.1]: Process exited with status 139
2012-04-14T21:25:33+00:00 heroku[web.1]: State changed from up to crashed

I'm not sure where to go from here. Does anyone have any idea how to get my local app (working perfectly) to work on heroku?

thanks, brad

Answer 1

I am doing a blindly guess here, but when you install the Active Admin you need to run the migrations after pushing to Heroku.

Try doing this:

heroku rake db:migrate