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I have a legacy database with which I need to interface. There are two tables that are joined together by two fields, and neither field is the primary key of its associated table. Is constructing an association between these tables beyond the capability of Rails? -- Posted via http://www.ruby-forum.com/.

Rails has many built in validation methods to ensure that an ActiveRecord instance cannot be created or updated under certain situations (typically caused by invalid data). However, I can find no methods to govern whether an ActiveRecord instance can be destroyed. Essentially, I wish an error to be raised when a user tries to delete an ActiveRecord without first adhering to a certain set of