Can we define DependsOn for functions?

Serverless Framework
1

I have a Lambda function declared in serverless.yml and it needs an environment variable which is the table name of Dynamodb table. Under resources, I create the DynamoDB Table. But while “sls deploy”, the function is created first and then the DynamoDB table. Is there any way I can provide DependsOn for the functions?

2

You should be able to but you also shouldn’t need to. This is how I do it.

service: demo # NOTE: update this with your service name

provider:
  stage: ${opt:stage, "dev"}
  environment:
    POSTS_TABLE: ${self:custom.postsTableName}
  iamRoleStatements:
    - Effect: Allow
      Action:
        - dynamodb:GetItem
        - dynamodb:PutItem
      Resource:
        Fn::GetAtt:
          - PostsTable
          - Arn

custom:
  postsTableName: ${self:service}-posts-${self:provider.stage}

functions:
  get:
    handler: get.getHandler
    events:
      - http:
          path: posts/{id}
          method: get

resources:
  Resources:
    PostsTable:
      Type: AWS::DynamoDB::Table
      Properties:
        TableName: ${self:custom.postsTableName}
        AttributeDefinitions:
          - AttributeName: id
            AttributeType: S
        KeySchema:
          - AttributeName: id
            KeyType: HASH
        ProvisionedThroughput:
          ReadCapacityUnits: 1
          WriteCapacityUnits: 1
3

Do you know how to define a dependency for a function? I’ve a function that depends on a VPC that has a VPCEndpoint which gets deleted before my function.

functions:
  dbMigration:
  handler: lambda-bin/migrate-db
  environment:
    DB_MASTER_USER: ${env:DB_MASTER_USER}
    DB_MASTER_PASSWORD: ${env:DB_MASTER_PASSWORD}
    DB_ADDRESS:
      "Fn::GetAtt": [ SheltersDB, Endpoint.Address ]
  vpc:
    securityGroupIds:
      - Ref: SheltersVPCSecurityGroup
    subnetIds:
      - Ref: SheltersSubnet1
      - Ref: SheltersSubnet2

You can see the whole config at https://github.com/hitta-skyddsrum/update-shelters/blob/83225bfb8f13aaafd88c96236daed3993e71cc86/serverless.yml

I guess it may be a bug within serverless though, since the VPCEndpoint should be dependent on the VPC.