Hello,

I ran into a problem recently that was previously reported as ticket
#802 [1]. The issue, briefly, occurs when a model definition runs a
class method (such as for a plugin) that checks table information. In
this case, loading the model requires the database table to already
exist. Running `rake db:migrate` in staging or production (anywhere
with config.cache_classes=true) will then try and eager load all
application classes, quickly failing with a table-not-found sort of
error.

Also, the eager loading seems pretty detrimental any time Rails is
booted from the console, such as via `script/runner` or `rake
db:migrate`. Not only can it blow up because of an unmigrated
database, but it incurs a pretty senseless performance hit for what
may be a simple task. This could really hit applications that use BJ
to run jobs in a full Rails environment, for example.

Does anyone have ideas how Rails might be smarter about when to eager
load?

-Lance

[1] http://rails.lighthouseapp.com/projects/8994-ruby-on-rails/tickets/802
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