[jruby-user] Error 'uninitialized constant Arel::Visitors::SQLite' with rails

The problems started when I updated a working Rails project to Netbeans
7.4. I have installed all the gems I thought I needed, and the result is
this error when trying to create a database.

uninitialized constant Arel::Visitors::SQLite

The error is here:
.../activerecord-jdbc-adapter-1.3.10/lib/arjdbc/sqlite3/adapter.rb:104:in
`SQLite3'

Relevant versions are:

    JRuby 1.7.0
    Rails 2.3.8
    activerecord-jdbcsqlite3-adaptor 1.3.10.

A bit of searching told me that "Arel::Visitors::VISITORS is deprecated
and will be removed", and this is likely to be somewhere around this
version of Rails. It didn't tell me what to do about it.

I suspect a dependency/version problem, but I have no idea what.

[My apologies if this post is badly formatted -- I tried, but the
markdown if any defeats me.]

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