Module: TablePrint::Printable

Defined in:
lib/table_print/printable.rb

Class Method Summary collapse

Class Method Details

.default_display_methods(target) ⇒ Object

Sniff the data class for non-standard methods to use as a baseline for display



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# File 'lib/table_print/printable.rb', line 4

def self.default_display_methods(target)
  if target.class.respond_to? :columns
    if target.class.columns.first.respond_to? :name

      # eg ActiveRecord
      return target.class.columns.collect(&:name)
    else

      # eg Sequel
      return target.class.columns
    end
  end

  # eg mongoid
  return target.fields.keys if target.respond_to? :fields and target.fields.is_a? Hash

  return target.keys if target.is_a? Hash
  return target.members.collect(&:to_sym) if target.is_a? Struct

  methods = []
  target.methods.each do |method_name|
    method = target.method(method_name)

    if method.owner == target.class
      if method.arity == 0 #
        methods << method_name.to_s
      end
    end
  end

  methods.delete_if { |m| m[-1].chr == "!" } # don't use dangerous methods
  methods
end