class Seri::Serializer::ValueFetcher

Public Class Methods

fetch(attribute, object, serializer) click to toggle source
# File lib/serializer/value_fetcher.rb, line 6
def self.fetch(attribute, object, serializer)
  new(attribute, object, serializer).fetch
end
new(attribute, object, serializer) click to toggle source
# File lib/serializer/value_fetcher.rb, line 12
def initialize(attribute, object, serializer)
  @attribute = attribute
  @values = [
    StaticValue.new(attribute),
    SerializedValue.new(attribute, serializer),
    HashValue.new(attribute, object),
    SerializedValue.new(attribute, object)
  ]
end

Public Instance Methods

fetch() click to toggle source
# File lib/serializer/value_fetcher.rb, line 22
def fetch
  serializer = @attribute.serializer

  return value unless serializer

  if value.is_a?(Enumerable) && !value.is_a?(Hash)
    value.map { |item| serializer.new(item).to_h }
  else
    serializer.new(value).to_h
  end
end
value() click to toggle source

Fetches a value from an attribute by checking if there's a .. .. static value set, or a .. .. method defined in the serializer, or a .. .. method/attribute defined in the object or .. .. it raises an error

# File lib/serializer/value_fetcher.rb, line 39
def value
  @value ||= begin
    extracted_value = @values.detect(&:precondition?)

    if extracted_value.nil?
      raise SerializerError,
            "unknown attribute '#{@values[0].extraction_key}'"
    end

    extracted_value.value
  end
end