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46 lines
1.3 KiB
ReStructuredText
46 lines
1.3 KiB
ReStructuredText
Connection
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==========
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A connection is a vitaminized version of a List that provides ways of
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slicing and paginating through it. The way you create Connection types
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in ``graphene`` is using ``relay.Connection`` and ``relay.ConnectionField``.
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Quick example
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-------------
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If we want to create a custom Connection on a given node, we have to subclass the
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``Connection`` class.
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In the following example, ``extra`` will be an extra field in the connection,
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and ``other`` an extra field in the Connection Edge.
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.. code:: python
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class ShipConnection(Connection):
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extra = String()
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class Meta:
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node = Ship
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class Edge:
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other = String()
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The ``ShipConnection`` connection class, will have automatically a ``pageInfo`` field,
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and a ``edges`` field (which is a list of ``ShipConnection.Edge``).
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This ``Edge`` will have a ``node`` field linking to the specified node
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(in ``ShipConnection.Meta``) and the field ``other`` that we defined in the class.
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Connection Field
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----------------
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You can create connection fields in any Connection, in case any ObjectType
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that implements ``Node`` will have a default Connection.
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.. code:: python
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class Faction(graphene.ObjectType):
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name = graphene.String()
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ships = relay.ConnectionField(ShipConnection)
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def resolve_ships(self, info):
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return []
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