Method: DataMapper::Persevere::Query#process_condition

Defined in:
lib/persevere_adapter/query.rb

#process_condition(condition) ⇒ Object 



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# File 'lib/persevere_adapter/query.rb', line 51

def process_condition(condition)
  case condition
    # Persevere 1.0 regular expressions are disable for security so we pass them back for DataMapper query filtering
    # without regular expressions, the like operator is inordinately challenging hence we pass it back
    # when :regexp then "RegExp(\"#{condition.value.source}\").test(#{condition.subject.name})"
  when DataMapper::Query::Conditions::RegexpComparison then []
  when DataMapper::Query::Conditions::LikeComparison then "#{condition.subject.field}='#{condition.loaded_value.gsub('%', '*')}'"
  when DataMapper::Query::Conditions::AndOperation then 
    inside = condition.operands.map { |op| process_condition(op) }.flatten
    inside.empty? ? []  : "(#{inside.join("&")})"
  when DataMapper::Query::Conditions::OrOperation then "(#{condition.operands.map { |op| process_condition(op) }.join("|")})"
  when DataMapper::Query::Conditions::NotOperation then 
    inside = process_condition(condition.operand) 
    inside.empty? ? [] : "!(%s)" % inside
  when DataMapper::Query::Conditions::InclusionComparison then 
    result_string = Array.new
    condition.value.to_a.each do |candidate|
      if condition.subject.is_a?(DataMapper::Associations::Relationship)
        result_string << "#{condition.subject.child_key.first.name}=#{candidate.key.first}" #munge_condition(condition)
      else
        result_string << "#{condition.subject.name}=#{candidate}"
      end
    end
    if result_string.length > 0
      "(#{result_string.join("|")})"
    else
      "#{condition.subject.name}=''"
    end
  when DataMapper::Query::Conditions::EqualToComparison,
    DataMapper::Query::Conditions::GreaterThanComparison,
    DataMapper::Query::Conditions::LessThanComparison, 
    DataMapper::Query::Conditions::GreaterThanOrEqualToComparison,
    DataMapper::Query::Conditions::LessThanOrEqualToComparison then
    munge_condition(condition)
  when DataMapper::Query::Conditions::NullOperation then []
  when Array then
    old_statement, bind_values = condition
    statement = old_statement.dup
    bind_values.each{ |bind_value| statement.sub!('?', bind_value.to_s) }
    statement.gsub(' ', '')
  else condition.to_s.gsub(' ', '')
  end
end