sequelize js中如何计算关联

Question

当我进行以下查询以获取带有选项的投票并且每个选项都有投票计数时。但它会让人费解。

router.get("/", (req, res) => {
  Poll.findAll({
    where: { subjectId: req.query.subjectId },
    include: {
      model: PollOption,
      attributes: {
        include: [[Sequelize.fn("COUNT", "pollVote.id"), "voteCount"]]
      },
      required: false,
      include: {
        model: PollVote,
        // attributes: [],
        required: false
      }
    },
    group:['pollOptions.id']
  }).then(poll => {
    console.log(poll);
    res.send({ poll });
  });
});

我得到这个作为回应

{
    "poll": [
//Array of the poll
           {
            "id": 3,
            "module_id": "mbbs",
            "question": "Test Question Poll",
            "pollOptions": [
                {
                    "id": 1,
                    "pollId": 3,
                    "option": "Option 1",
                    "voteCount": 1,
                    "pollVotes": [
                        {
                            "id": 6,
                            "pollOptionId": 1,
                            "pollId": 3,
                            "userId": 3
                        }
                    ]
                },
                {
                    "id": 2,
                    "pollId": 3,
                    "userId": 120,
                    "option": "Option 2",
                    "voteCount": 2,
                     //Vote must be 1 but return 2
                    "pollVotes": [
                        {
                            "id": 2,
                            "pollOptionId": 2,
                            "pollId": 3,
                            "userId": 1
                        }
                    ]
                }
            ]
        },
        {
            "id": 4,
            "module_id": "mbbs",
            "question": "Test Question Poll 4",
            "subjectId": 1,
            "pollOptions": [
                {
                    "id": 3,
                    "pollId": 4,
                    "option": "Option 1sd",

                    "voteCount": 1,
                    "pollVotes": []
                }
            ]
        }
    ]
}

在哪里 voteCount 是错误的。 我怎样才能使它正确。

Sql查询如下

选择poll.id, poll.module_id, poll.question, poll.userId, userId, poll.poll.poll.@9876543333 @, poll.expireDate, pollOptions.id AS pollOptions.id, pollOptions.pollId AS pollOptions.pollId, pollOptions.@987654344.@AS @987654345., @987654344. option AS pollOptions.option, COUNT('pollVote.id') AS pollOptions.voteCount, pollOptions->pollVotes.id AS pollOptions.pollVotes.id, pollOptions->pollVotes.pollOptionId AS pollOptions.pollVotes.pollOptionId, @987654。 987654357@aspollOptions.pollVotes.pollId，pollOptions->pollVotes。userIdaspollOptions.pollVotes.userIdpollfrompollas@987654363 987654369@左OUTER JOINpollVoteaspollOptions->pollVotesonpollOptions。id=pollOptions->pollVotes=pollOptions->pollVotes。

Answer 1

您的sequelize 声明应如下 -

router.get("/", (req, res) => {
  Poll.findAll({
    where: { subjectId: req.query.subjectId },
    include: {
      model: PollOption,
      attributes: {
        include: [[Sequelize.fn("COUNT", `pollOptions->pollVotes.id`), "voteCount"]]
      },
      required: false,
      include: {
        model: PollVote,
        // attributes: [],
        required: false
      }
    },
    group:['pollOptions.id']
  }).then(poll => {
    console.log(poll);
    res.send({ poll });
  });
});

希望对你有帮助！