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Crash during init if DB config doesn't exist
#2197
If a Rails application uses ActiveRecord but does not use a database, Rails will crash during initialization because the database config file does not exist.
If you're wondering why/how an application would use AR but not use a database, have a look at Jonathan Viney's ActiveRecord::BaseWithoutTable[1]. It's very useful.
I've attached a patch that causes Rails' initialization to check for the existence of the database config file before attempting to read the config and connect to the database.
