在 dynamodb 中使用 batchWriteItem

素材狗 2022-01-01 17:32:23 文章分类：前端问题点击数：1次

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Using batchWriteItem in dynamodb(在 dynamodb 中使用 batchWriteItem)

本文介绍了在 dynamodb 中使用 batchWriteItem的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

我的 dynamo db 中有两个表，一个是候选表，另一个是用户表，我想在 dynamo db 中使用 batchWriteItem 以便在表中添加数据.

I have two tables in my dynamo db one is candidate table and the other one is user table I want to use batchWriteItem in dynamo db in order to add the data in the table.

我格式化的查询如下

var user = {
        userid: usrid,
        role: 'candidate',
        password: vucrypt.encryptpass(pass)
      };

      var canduser = {
        fname: req.body.fname,
        lname: req.body.lname,
        location: req.body.location,
        phone: req.body.phone,
        ccode: req.body.ccode,
        grad: req.body.grad,
        pgrad: req.body.pgrad,
        ograd: req.body.ograd,
        experience: exp,
        linkedin: req.body.linkedin,
        terms: tandc
      };
      canduser = vutools.fixcanduser(canduser);
      canduser.userid = usrid;

      var writes = {
        'users': [{put: user}],
        'candidate': [{put: canduser}],
      };

但是如果我使用
dynamodb.batchWriteItem(writes, function(err, regdata) {}

它以错误告终.如何编写正确的查询?我得到的错误是这样的.

Its ending up as error. How can I write the right query? The error I am getting is this.

MultipleValidationErrors: There were 3 validation errors:
* MissingRequiredParameter: Missing required key 'RequestItems' in params
* UnexpectedParameter: Unexpected key 'users' found in params
* UnexpectedParameter: Unexpected key 'candidate' found in params

推荐答案

这是正确的答案有一些类型问题.

This is the right answer there are some type problems.

  var createuser = {
    "RequestItems": {
      "users": [{
           "PutRequest": {
               Item: {
                    "userid": {
                        "S": usrid +""
                    },
                    "password": {
                        "S": vucrypt.encryptpass(pass) +""
                    },
                    "role": {
                      "S": 'candidate' +""
                    }
                }
             }
        }],
      "candidate": [{
           "PutRequest": {
             Item: {
                  "ccode": {
                      "S": req.body.ccode +""
                  },
                  "fname": {
                      "S": req.body.fname +""
                  },
                  "lname": {
                      "S": req.body.lname +""
                  },
                  "pgrad": {
                      "S": req.body.pgrad +""
                  },
                  "videoresumeurl": {
                      "S": "-"
                  },
                  "phone": {
                      "S": req.body.phone +""
                  },
                  "terms": {
                      "S": tandc +""
                  },
                  "location": {
                      "S": req.body.location +""
                  },
                  "experience": {
                      "N": req.body.experience +""
                  },
                  "userid": {
                      "S": usrid +""
                  },
                  "grad": {
                      "S": req.body.grad +""
                  }
               }
             }
        }]
    }
  }