Question

我正在制作一个示例捐赠应用程序，我想获取用户所做的所有捐赠，以及捐赠也已关联的原因。

exports.getUserDonations = (req, res) => {
  // Get Donations made by the user by userID
  Donation.findAll({
    where: {
      userID: req.params.id,
    },
    attributes: ['amount', 'updatedAt', 'causeID'],
    include: [{
      model: Cause,
      as: 'Causes',
    }]
  })
    .then(donations => {
      if (donations) {
        res.status(200).json(donations);
      } else {
        res.status(404).send({ error: "No Donations found" });
      }
    })
    .catch(err => {
      console.log("Error: ", err)
      res.status(500).json(err);
    });
}

由于某种原因，我得到了这种结果。如您所见，“ causeID”（12）和“ Cause.id”（17）字段不匹配。我的想法是上面的where语句可能覆盖了某些内容。

    {
        "amount": 82,
        "updatedAt": "2018-11-02T17:04:30.847Z",
        "causeID": 12,
        "Causes": {
            "id": 17,
            "userID": 1,
            "orgID": null,
            "name": "Croation Trip",
            "type": "Trip",
            "amount": 3000,
            "description": "Just taking a trip",
            "purpose": "Food, sun, and fun",
            "createdAt": "2018-09-20T21:56:37.330Z",
            "updatedAt": "2018-09-20T21:56:37.330Z"
        }
    },

// Most fo the time the cause comes back as null
{
    "amount": 10,
    "updatedAt": "2018-11-27T01:35:06.061Z",
    "causeID": 13,
    "Causes": null
},

这是我与每个人的关联

   // Cause association
   Cause.associate = function(models) {
    Cause.belongsTo(models.User, {
      as: "Users",
      foreignKey: "id"
    })
    
    Cause.hasMany(models.Donation, {
      as: "Donations",
      foreignKey: "causeID"
    })
    
  };
  
  
  // Donation associations
  Donation.associate = function(models) {
    Donation.belongsTo(models.Cause, {
      as: "Causes",
      foreignKey: "id"
    })
    
    Donation.belongsTo(models.User, {
      as: "Users",
      foreignKey: "id"
    })
    
  };

Answer 1

好像您不匹配某些键。我认为您的示例将Donation.Id加入到Cause.Id中-您应该通过查看生成的SQL进行确认。将密钥与不同名称关联的方法如下：

Donation.belongsTo(models.Cause, {
      as: "Causes",
      {foreignKey: "id", sourceKey: "causeId"}
    })

或使用更多捐赠属性进行测试：

attributes: ['id', 'userId', 'amount', 'updatedAt', 'causeID'],

捐赠ID是否与原因ID相符？

Sequelize.js包含返回不正确的数据

1 个答案: