class ActiveRecord::Promise

Public Instance Methods

Source

# File lib/active_record/promise.rb, line 13
def pending?
  @future_result.pending?
end

Returns whether the associated query is still being executed or not.

then (&block)

Source

# File lib/active_record/promise.rb, line 36
def then(&block)
  Promise.new(@future_result, @block ? @block >> block : block)
end

Returns a new ActiveRecord::Promise that will apply the passed block when the value is accessed:

Post.async_pick(:title).then { |title| title.upcase }.value
# => "POST TITLE"

value ()

Source

# File lib/active_record/promise.rb, line 20
def value
  return @value if defined? @value

  result = @future_result.result
  @value = if @block
    @block.call(result)
  else
    result
  end
end

Returns the query result. If the query wasn’t completed yet, accessing value will block until the query completes. If the query failed, value will raise the corresponding error.

Private Instance Methods

status ()

Source

# File lib/active_record/promise.rb, line 53
def status
  if @future_result.pending?
    :pending
  elsif @future_result.canceled?
    :canceled
  else
    :complete
  end
end