Crate juniper_relay_connection

Relay style pagination for Juniper.

To return a connection from your resolver, just call RelayConnection::new providing a closure to load the connection nodes.

Example

#[derive(GraphQLObject)]
struct Foo {
  id: i32,
}

impl RelayConnectionNode for Foo {
    type Cursor = i32;
    fn cursor(&self) -> Self::Cursor {
        self.id
    }
    fn connection_type_name() -> &'static str {
        "FooConnection"
    }
    fn edge_type_name() -> &'static str {
        "FooConnectionEdge"
    }
}

RelayConnection::new(first, after, last, before, |after, before, limit| {
    let sql = format!(
        "SELECT (id) FROM foo WHERE id > {after:?} AND id < {before:?} LIMIT {limit:?}"
    );
    let edges: Vec<Foo> = run_query(sql);
    Ok(edges)
})

Structs

RelayConnection

Implements the relay connection specification, and allows to easily paginate over any given list of GraphQL objects.

Traits

RelayConnectionNode

To return objects inside a connection, they must implement this trait.