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The Mostfit Business Rules Engine

It consists of:

  1. Main Files - lib/rules.rb
  2. View - app/views/rules/
  3. Controller - app/controllers/rules.rb
  4. Model - app/models/rule.rb

This rules engine can handle multiple conditions (connected with and and or operators) simultaneously and since the rules are compiled to respective models (using validates_with_method of datamapper), it produces minimal overhead.

The rules can be manipulated in run-time without re-booting the server.

Internals

Internally, the rules engine uses BasicCondition(B) class (in lib/rules.rb) to represent a simple condition(S), a complex condition(C1) is either C1 = [:not, C2] or C1 = [:and, C2, C3] or C1 = [:or. C2, C3] or C1 = [is_basic_condition = true, B]

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