class RailsServersideDatatables::IfThen
Public Class Methods
new( testexpr, comparison_val, thenexpr, elseexpr )
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# File lib/rails_serverside_datatables/expressions.rb, line 19 def initialize( testexpr, comparison_val, thenexpr, elseexpr ) expression = ExprTreeNode.new('', Type::OPERATOR ) # Concat the statements only expression.add_argument raw( 'CASE' ) expression.add_argument testexpr if comparison_val.nil? expression.add_argument raw( 'IS NULL' ) comparison_val = raw( true ) end expression.add_argument raw( 'WHEN' ) expression.add_argument comparison_val expression.add_argument raw( 'THEN' ) expression.add_argument thenexpr expression.add_argument raw( 'ELSE' ) expression.add_argument elseexpr expression.add_argument raw( 'END' ) @expression = expression end