Class: GraphQL::Relay::ArrayConnection

Inherits:
BaseConnection show all
Defined in:
lib/graphql/relay/array_connection.rb

Constant Summary

Constants inherited from BaseConnection

BaseConnection::CONNECTION_IMPLEMENTATIONS, BaseConnection::CURSOR_SEPARATOR

Instance Attribute Summary

Attributes inherited from BaseConnection

#arguments, #context, #field, #max_page_size, #nodes, #parent

Instance Method Summary collapse

Methods inherited from BaseConnection

#after, #before, connection_for_nodes, #decode, #edge_nodes, #encode, #end_cursor, #initialize, #inspect, #page_info, register_connection_implementation, #start_cursor

Constructor Details

This class inherits a constructor from GraphQL::Relay::BaseConnection

Instance Method Details

#cursor_from_node(item) ⇒ Object 



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# File 'lib/graphql/relay/array_connection.rb', line 5

def cursor_from_node(item)
  idx = (after ? index_from_cursor(after) : 0) + sliced_nodes.find_index(item) + 1
  encode(idx.to_s)
end

#first ⇒ Object 



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# File 'lib/graphql/relay/array_connection.rb', line 34

def first
  @first ||= begin
    capped = limit_pagination_argument(arguments[:first], max_page_size)
    if capped.nil? && last.nil?
      capped = max_page_size
    end
    capped
  end
end

#has_next_page ⇒ Object 



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# File 'lib/graphql/relay/array_connection.rb', line 10

def has_next_page
  if first
    # There are more items after these items
    sliced_nodes.count > first
  elsif GraphQL::Relay::ConnectionType.bidirectional_pagination && before
    # The original array is longer than the `before` index
    index_from_cursor(before) < nodes.length + 1
  else
    false
  end
end

#has_previous_page ⇒ Object 



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# File 'lib/graphql/relay/array_connection.rb', line 22

def has_previous_page
  if last
    # There are items preceding the ones in this result
    sliced_nodes.count > last
  elsif GraphQL::Relay::ConnectionType.bidirectional_pagination && after
    # We've paginated into the Array a bit, there are some behind us
    index_from_cursor(after) > 0
  else
    false
  end
end

#last ⇒ Object 



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# File 'lib/graphql/relay/array_connection.rb', line 44

def last
  @last ||= limit_pagination_argument(arguments[:last], max_page_size)
end