Class: GraphQL::Relay::RelationConnection
- Inherits:
-
BaseConnection
- Object
- BaseConnection
- GraphQL::Relay::RelationConnection
- Defined in:
- lib/graphql/relay/relation_connection.rb
Overview
A connection implementation to expose SQL collection objects. It works for:
ActiveRecord::Relation
Sequel::Dataset
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
- #cursor_from_node(item) ⇒ Object
- #first ⇒ Object
- #has_next_page ⇒ Object
- #has_previous_page ⇒ Object
- #last ⇒ Object
Methods inherited from BaseConnection
#after, #before, connection_for_nodes, #decode, #edge_nodes, #encode, #end_cursor, #initialize, #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/relation_connection.rb', line 9 def cursor_from_node(item) item_index = paged_nodes_array.index(item) if item_index.nil? raise("Can't generate cursor, item not found in connection: #{item}") else offset = item_index + 1 + ((relation_offset(paged_nodes) || 0) - (relation_offset(sliced_nodes) || 0)) if after offset += offset_from_cursor(after) elsif before offset += offset_from_cursor(before) - 1 - sliced_nodes_count end encode(offset.to_s) end end |
#first ⇒ Object
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# File 'lib/graphql/relay/relation_connection.rb', line 34 def first return @first if defined? @first @first = get_limited_arg(:first) @first = max_page_size if @first && max_page_size && @first > max_page_size @first end |
#has_next_page ⇒ Object
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# File 'lib/graphql/relay/relation_connection.rb', line 26 def has_next_page !!(first && sliced_nodes_count > first) end |
#has_previous_page ⇒ Object
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# File 'lib/graphql/relay/relation_connection.rb', line 30 def has_previous_page !!(last && sliced_nodes_count > last) end |
#last ⇒ Object
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# File 'lib/graphql/relay/relation_connection.rb', line 42 def last return @last if defined? @last @last = get_limited_arg(:last) @last = max_page_size if @last && max_page_size && @last > max_page_size @last end |