Method: DataMapper::Persevere::Query#to_json_query

Defined in:
lib/persevere_adapter/query.rb

#to_json_query ⇒ Object

Convert a DataMapper Query to a JSON Query.

Parameters:

  • query (Query) —

    The DataMapper query object passed in



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# File 'lib/persevere_adapter/query.rb', line 102

def to_json_query      
  # Body of main function

  json_query = ''
  field_ops = Array.new
  outfields = Array.new
  
  json_query += self.to_json_query_filter

  self.fields.each do |field|
    if field.respond_to?(:operator)
      field_ops << case field.operator
      when :count then
        if field.target.is_a?(DataMapper::Property)
          "[?#{field.target.field}!=undefined].length"
        else # field.target is all.
          ".length"
        end
      when :min
        if field.target.kind_of?(DataMapper::Property::DateTime) || 
          field.target.kind_of?(DataMapper::Property::Time) || 
          field.target.kind_of?(DataMapper::Property::Date)
          "[=#{field.target.field}]"
        else
          ".min(?#{field.target.field})"
        end
      when :max
        if field.target.kind_of?(DataMapper::Property::DateTime) || 
          field.target.kind_of?(DataMapper::Property::Time) || 
          field.target.kind_of?(DataMapper::Property::Date)
          "[=#{field.target.field}]"
        else
          ".max(?#{field.target.field})"
        end
      when :sum
        ".sum(?#{field.target.field})"
      when :avg
        "[=#{field.target.field}]"
      end
    else
      outfields << "'#{field.field}':#{field.field}"
    end
  end

  json_query += field_ops.join("")

  json_query += self.to_json_query_ordering

  json_query += "[={" + outfields.join(',') + "}]" unless outfields.empty?


  # puts json_query, headers
  return json_query, self.json_query_headers
end