Update Project

Let’s make some changes. Let’s start with manual changes. It’ll help you get to know how things work.

Change Lambda Function

The Lambda Console allows us to edit code directly with the browser. It allows us to test, debug, and learn quickly. We’ll add a puts "debugging posts#index called" statement.

You can click Deploy to deploy the changes.

Jets Logs

You can also use the jets logs command to tail the logs in your terminal.

❯ jets logs -f
2023-10-29 01:59:18 UTC INIT_START Runtime Version: ruby:3.2.v9 Runtime Version ARN: arn:aws:lambda:us-west-2::runtime:b96ddb9b1905c3979339d7706a5f7cfda1d851593b1255eb0f15ff573c17fd28
2023-10-29 01:59:21 UTC START RequestId: 30131e6d-1ee9-4956-a485-6c703cd8eae4 Version: $LATEST
2023-10-29 01:59:21 UTC Started GET "/posts" for 15.158.54.12 at 2023-10-29 01:59:21 +0000
2023-10-29 01:59:21 UTC Processing PostsController#index
2023-10-29 01:59:21 UTC   Event: {"resource":"/{catchall+}","path":"/posts","httpMethod":"GET","headers":{"Accept":"*/*","CloudFront-Forwarded-Proto":"https","CloudFront-Is-Desktop-Viewer":"true","CloudFront-Is-Mobile-Viewer":"false","CloudFront-Is-SmartTV-Viewer":"false","CloudFront-Is-Tablet-Viewer":"false","CloudFront-Viewer-ASN":"16509","CloudFront-Viewer-Country":"US","Host":"2bmdurd1ra.execute-api.us-west-2.amazonaws.com","User-Agent":"curl/7.81.0","Via":"2.0 4b800f7fa2c3fbb9f4f3c505b0df315e.cloudfront.net (CloudFront)","X-Amz-Cf-Id":"fL1obeybJNI_ePtuHPqFtWSdhuPMVv-kUrqohz_y_6oMOUso4YgSkg==","X-Amzn-Trace-Id":"Root=1-653dbc75-7befc9201424c9594a6aa433","X-Forwarded-For":"35.162.212.186, 15.158.54.12","X-Forwarded-Port":"443","X-Forwarded-Proto":"https"},"multiValueHeaders":{"Accept":["*/*"],"CloudFront-Forwarded-Proto":["https"],"CloudFront-Is-Desktop-Viewer":["true"],"CloudFront-Is-Mobile-Viewer":["false"],"CloudFront-Is-SmartTV-Viewer":["false"],"CloudFront-Is-Tablet-Viewer":["false"],"CloudFront-Viewer-ASN":["16509"],"CloudFront-Viewer-Country":["US"],"Host":["2bmdurd1ra.execute-api.us-west-2.amazonaws.com"],"User-Agent":["curl/7.81.0"],"Via":["2.0 4b800f7fa2c3fbb9f4f3c505b0df315e.cloudfront.net (CloudFront)"],"X-Amz-Cf-Id":["fL1obeybJNI_ePtuHPqFtWSdhuPMVv-kUrqohz_y_6oMOUso4YgSkg=="],"X-Amzn-Trace-Id":["Root=1-653dbc75-7befc9201424c9594a6aa433"],"X-Forwarded-For":["35.162.212.186, 15.158.54.12"],"X-Forwarded-Port":["443"],"X-Forwarded-Proto":["https"]},"queryStringParameters":null,"multiValueQueryStringParameters":null,"pathParameters":{"catchall":"posts"},"stageVariables":null,"requestContext":{"resourceId":"6mhwk1","resourcePath":"/{catchall+}","httpMethod":"GET","extendedRequestId":"NipiaE1oPHcEjLQ=","requestTime":"29/Oct/2023:01:59:17 +0000","path":"/dev/posts","accountId":"536766270177","protocol":"HTTP/1.1","stage":"dev","domainPrefix":"2bmdurd1ra","requestTimeEpoch":1698544757528,"requestId":"96b388e4-2b69-4e5d-a28a-41a203abc922","identity":{"cognitoIdentityPoolId":null,"accountId":null,"cognitoIdentityId":null,"caller":null,"sourceIp":"35.162.212.186","principalOrgId":null,"accessKey":null,"cognitoAuthenticationType":null,"cognitoAuthenticationProvider":null,"userArn":null,"userAgent":"curl/7.81.0","user":null},"domainName":"2bmdurd1ra.execute-api.us-west-2.amazonaws.com","apiId":"2bmdurd1ra"},"body":null,"isBase64Encoded":false}
2023-10-29 01:59:21 UTC   Parameters: {"catchall":"posts"}
2023-10-29 01:59:21 UTC debugging posts#index called
2023-10-29 01:59:21 UTC Completed Status Code 200 in 0.374s
2023-10-29 01:59:21 UTC END RequestId: 30131e6d-1ee9-4956-a485-6c703cd8eae4
2023-10-29 01:59:21 UTC REPORT RequestId: 30131e6d-1ee9-4956-a485-6c703cd8eae4  Duration: 455.15 ms     Billed Duration: 456 ms Memory Size: 1536 MB       Max Memory Used: 178 MB Init Duration: 2963.50 ms

The jets logs command will use the Log Group from the controller Lambda function, IE: /aws/lambda/demo-dev-controller by default, so we do not have to specify the name as we did in the Jets Project Job Learn Guide.

Update Code and Deploy Changes

So far, we have been making manual changes. We should codify the changes. To help see the changes, let’s make some additional changes so that it’s easy to check.

app/controllers/posts_controller.rb

class PostsController < ApplicationController
  before_action :set_post, only: %i[ show update destroy ]

  # GET /posts
  def index
    puts "debugging again posts#index called"
    @posts = Post.all

    render json: @posts
  end

  # ....
end

Deploy again

❯ jets deploy
Deploying to Lambda demo-dev app...
...
02:05:53AM UPDATE_COMPLETE AWS::CloudFormation::Stack demo-dev
Stack success status: UPDATE_COMPLETE
Time took: 1m 16s
Prewarming application.
API Gateway Endpoint: https://2bmdurd1ra.execute-api.us-west-2.amazonaws.com/dev/

Once changes have been deployed, confirm Lambda Source code changes.

If you still have jets logs running in a terminal, you’ll see the logs tailing as you’re testing.

Next, we’ll delete the project.

In this section: