mongodb 0.9.1

The official MongoDB driver for Rust (currently in alpha)
Documentation
# Drivers MUST raise an error if maxStalenessSeconds is defined and not -1
# and the ``mode`` field is 'primary'.
---
topology_description:
  type: ReplicaSetWithPrimary
  servers:
  - &1
    address: a:27017
    type: RSPrimary
    avg_rtt_ms: 5
    lastUpdateTime: 0
    maxWireVersion: 5
    lastWrite: {lastWriteDate: {$numberLong: "1"}}
  - &2
    address: b:27017
    type: RSSecondary
    avg_rtt_ms: 5
    lastUpdateTime: 0
    maxWireVersion: 5
    lastWrite: {lastWriteDate: {$numberLong: "1"}}
read_preference:
  maxStalenessSeconds: 120
error: true