無法通過 mongodb 中的過濾器 () 獲取數據

Question

我試圖通過這個找到分配給用戶的任務

router.get('/all', auth, async (req, res) => {
  try {
    const assignments_raw = await Assignment.find({listP: listP.indexOf(req.user.userId)})
    res.json(assignments_raw)
  } catch (e) {
    res.status(500).json({ message: 'Something went wrong, try again' })
  }
})

具體來說，這一行應該找到了所有在 listP 字段中具有與用戶 ID 對應的元素的任務

 const assignments_raw = await Assignment.find({listP: listP.indexOf(req.user.userId)})

但這會導致錯誤，為什么？ 以下是芒果的摘錄

Answer 1

你可以這樣做

router.get('/all', auth, async (req, res) => {
  try {
    const assignments_raw = await Assignment.find()
    let assignments = []
    assignments_raw.map(assignment => {
          if (assignment.listP.indexOf(req.user.userId) !== -1) {
              assignments.push(assignment)
          }


        }
        )
    res.json(assignments)
  } catch (e) {
    res.status(500).json({ message: 'Something went wrong, try again' })
  }
})