尝试使用Dynamoose在本地DynamoDB上运行Chai时，配置中缺少区域

Question

我正在使用Restify，并且正在尝试学习如何编写我的CRUD方法的测试。当我连接到DynamoDB时，我可以在Postman上测试它们，没有任何问题。对于测试，我将连接到我的本地DynamoDB，它在localhost:8000上运行。

在server.listen上，我有这样的设置：

dynamoose.AWS.config.update({
  accessKeyId: config.db.aws_access_key_id,
  secretAccessKey: config.db.aws_secret_access_key,
  region: config.db.aws_region
});

if (config.env == "test") {
  dynamoose.local();
}

(我也尝试过调用上述更新中的dynamoose.local() )

当我使用mocha --timeout 10000命令运行测试时，我得到以下错误：

1) Uncaught error outside test suite:
     Uncaught ConfigError: Missing region in config
      at Request.VALIDATE_REGION (node_modules/aws-sdk/lib/event_listeners.js:91:45)
      at Request.callListeners (node_modules/aws-sdk/lib/sequential_executor.js:105:20)
      at callNextListener (node_modules/aws-sdk/lib/sequential_executor.js:95:12)
      at /Users/username/Development/projectname-api/node_modules/aws-sdk/lib/event_listeners.js:85:9
      at finish (node_modules/aws-sdk/lib/config.js:320:7)
      at /Users/username/Development/projectname-api/node_modules/aws-sdk/lib/config.js:338:9
      at SharedIniFileCredentials.get (node_modules/aws-sdk/lib/credentials.js:126:7)
      at getAsyncCredentials (node_modules/aws-sdk/lib/config.js:332:24)
      at Config.getCredentials (node_modules/aws-sdk/lib/config.js:352:9)
      at Request.VALIDATE_CREDENTIALS (node_modules/aws-sdk/lib/event_listeners.js:80:26)
      at Request.callListeners (node_modules/aws-sdk/lib/sequential_executor.js:101:18)
      at Request.emit (node_modules/aws-sdk/lib/sequential_executor.js:77:10)
      at Request.emit (node_modules/aws-sdk/lib/request.js:683:14)
      at Request.transition (node_modules/aws-sdk/lib/request.js:22:10)
      at AcceptorStateMachine.runTo (node_modules/aws-sdk/lib/state_machine.js:14:12)
      at Request.runTo (node_modules/aws-sdk/lib/request.js:403:15)
      at Request.send (node_modules/aws-sdk/lib/request.js:367:10)
      at features.constructor.makeRequest (node_modules/aws-sdk/lib/service.js:193:27)
      at features.constructor.svc.(anonymous function) [as describeTable] (node_modules/aws-sdk/lib/service.js:499:23)
      at Table.describe (node_modules/dynamoose/lib/Table.js:339:7)
      at Table.init (node_modules/dynamoose/lib/Table.js:141:10)
      at Function.compile (node_modules/dynamoose/lib/Model.js:201:9)
      at Dynamoose.model (node_modules/dynamoose/lib/index.js:39:21)
      at Object.<anonymous> (models/modelName.js:63:35)
      at require (internal/module.js:11:18)
      at Object.<anonymous> (test/testFileName.js:4:25)
      at require (internal/module.js:11:18)
      at Array.forEach (<anonymous>)
      at startup (bootstrap_node.js:188:16)
      at bootstrap_node.js:609:3

现在我知道这是一个问题，因为dynamoose不能配置区域。但是，当我在开发中运行它时，使用相同的代码没有任何问题。在我的配置文件中，我也有相同的DB配置。我通过在if (config.env == "test")中添加console.log(config.db)来验证这一点。所以我认为应该对其进行配置。

如果需要的话，下面是我的测试：

describe('ModelName', () => {
  beforeEach((done) => {
    ModelName.delete({}, (err) => {
      done();
    });
  });

  describe('/GET modelName', () => {
    it('it should GET all the model-name instances', (done) => {
      chai.request(server)
        .get('/model-name')
        .end((err, res) => {
            res.should.have.status(200);
            res.body.should.be.a('array');
            res.body.length.should.be.eql(0);
          done();
        });
    });
  });
});

你知道问题出在哪里吗？

Answer 1

在本地运行时，将从位于以下位置的文件中选取您所在的区域

%UserProfile%\.aws\config

它将看起来像这样

[default]
region=us-west-2
output=json

我的猜测是，当您在服务器上运行时，

dynamoose.AWS.config.update({
  accessKeyId: config.db.aws_access_key_id,
  secretAccessKey: config.db.aws_secret_access_key,
  region: config.db.aws_region
});

没有做你期望的事情，但当你在本地运行时，这个问题是隐藏的，因为配置会在你的配置文件中被提取。

尝试将配置设置为文字region: 'us-west-2'，或者您可以设置凭据，并且配置是服务器上的环境变量(它们将被自动选取)。