Single Function Deploy Failure: Cannot set property 'artifact' of undefined

[MrTeale]

I'm running into an issue regarding deploying a single function. I can deploy all of the functions using sls deploy but I have the issue of Cannot set property 'artifact' of undefined whenever I attempt to deploy a single one. I have included my versions, a traceback of the issue and my serverless.yml file.

My versions are:
OS: darwin (specifically macOS Version 10.14 Beta (18A293u)
Node Version: 6.11.1
Serverless Version: 1.32.0
Serverless-python-requirements: 4.1.0

Below is my traceback from attempting to run a single function deploy:

Cosmos:PROJECT_ALPHA MrTeale$ sls deploy function -f strategy
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command create
Serverless: Load command install
Serverless: Load command package
Serverless: Load command deploy
Serverless: Load command deploy:function
Serverless: Load command deploy:list
Serverless: Load command deploy:list:functions
Serverless: Load command invoke
Serverless: Load command invoke:local
Serverless: Load command info
Serverless: Load command logs
Serverless: Load command login
Serverless: Load command logout
Serverless: Load command metrics
Serverless: Load command print
Serverless: Load command remove
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command slstats
Serverless: Load command plugin
Serverless: Load command plugin
Serverless: Load command plugin:install
Serverless: Load command plugin
Serverless: Load command plugin:uninstall
Serverless: Load command plugin
Serverless: Load command plugin:list
Serverless: Load command plugin
Serverless: Load command plugin:search
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command create_domain
Serverless: Load command delete_domain
Serverless: Load command requirements
Serverless: Load command requirements:clean
Serverless: Load command requirements:install
Serverless: WARNING: Missing "tenant" and "app" properties in serverless.yml. Without these properties, you can not publish the service to the Serverless Platform.
Serverless: Invoke deploy:function
Serverless: Installing requirements of src/api/requirements.txt in .serverless/src/api...
Serverless: Docker Image: lambci/lambda:build-python3.6
Serverless: Installing requirements of src/scheduler/requirements.txt in .serverless/src/scheduler...
Serverless: Docker Image: lambci/lambda:build-python3.6
Serverless: Installing requirements of src/strategy/requirements.txt in .serverless/src/strategy...
Serverless: Docker Image: lambci/lambda:build-python3.6
Serverless: Copying vendor libraries from ./src/parser to .serverless/src/strategy/requirements...
Serverless: Installing requirements of src/analysis/requirements.txt in .serverless/src/analysis...
Serverless: Docker Image: lambci/lambda:build-python3.6
Serverless: Invoke package:function
Serverless: Packaging function: strategy...
Serverless: Excluding development dependencies...
Serverless: Injecting required Python packages to package...

  Type Error ---------------------------------------------

  Cannot set property 'artifact' of undefined

     For debugging logs, run again after setting the "SLS_DEBUG=*" environment variable.

  Stack Trace --------------------------------------------

TypeError: Cannot set property 'artifact' of undefined
    at BbPromise.resolve.filter.map.map.func (/Users/MrTeale/Desktop/PROJECT_ALPHA/node_modules/serverless-python-requirements/lib/inject.js:102:33)
From previous event:
    at PluginManager.invoke (/usr/local/lib/node_modules/serverless/lib/classes/PluginManager.js:390:22)
    at PluginManager.run (/usr/local/lib/node_modules/serverless/lib/classes/PluginManager.js:421:17)
    at variables.populateService.then.then (/usr/local/lib/node_modules/serverless/lib/Serverless.js:157:33)
    at runCallback (timers.js:672:20)
    at tryOnImmediate (timers.js:645:5)
    at processImmediate [as _immediateCallback] (timers.js:617:5)
From previous event:
    at Serverless.run (/usr/local/lib/node_modules/serverless/lib/Serverless.js:144:8)
    at serverless.init.then (/usr/local/lib/node_modules/serverless/bin/serverless:43:50)

  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Issues:        forum.serverless.com

  Your Environment Information -----------------------------
     OS:                     darwin
     Node Version:           6.11.1
     Serverless Version:     1.32.0

Serverless.yml file:

service: project-alpha

package:
    individually: true

plugins:
  - serverless-domain-manager
  - serverless-python-requirements

custom:
  pythonRequirements:
    dockerizePip: true
  schedulesTableName: 'schedules-table-${self:provider.stage}'
  usersTableName: 'users-table-${self:provider.stage}'
  strategiesTableName: 'strategies-table-${self:provider.stage}'
  customDomain:
    domainName: **INSERT DOMAIN HERE**
    basePath: ''
    stage: ${self:provider.stage}
    createRoute53Record: true

provider:
  name: aws
  runtime: python3.6
  stage: dev
  region: us-east-1
  profile: private
  logRetentionInDays: 1
  memorySize: 128

functions:
  api:
    module: src/api
    handler: wsgi.handler
    role: apiIAMRole
    events:
      - http:
          path: /
          method: ANY
          cors: true
      - http:
          path: '{proxy+}'
          method: ANY
          cors: true
  schedule:
    module: src/scheduler
    handler: schedule.main
    role: schedulerIAMRole
    events:
      - stream:
          type: dynamodb
          arn:
            Fn::GetAtt:
              - SchedulesDynamoDBTable
              - StreamArn
          batchSize: 1
          startingPosition: LATEST
          enabled: true
  strategy:
    module: src/strategy
    handler: strat.main
    role: strategyIAMRole
    vendor: ./src/parser
  analysis:
    module: src/analysis
    handler: analysis.main
    role: analysisIAMRole

resources:
  Resources:
    SchedulesDynamoDBTable:
      Type: 'AWS::DynamoDB::Table'
      Properties:
        AttributeDefinitions:
          - AttributeName: uniqueID
            AttributeType: S
        KeySchema:
          - AttributeName: uniqueID
            KeyType: HASH
        ProvisionedThroughput:
          ReadCapacityUnits: 1
          WriteCapacityUnits: 1
        TableName: ${self:custom.schedulesTableName}
        StreamSpecification:
          StreamViewType: NEW_IMAGE
    UsersDynamoDBTable:
      Type: 'AWS::DynamoDB::Table'
      Properties:
        AttributeDefinitions:
          - AttributeName: username
            AttributeType: S
        KeySchema:
          - AttributeName: username
            KeyType: HASH
        ProvisionedThroughput:
          ReadCapacityUnits: 1
          WriteCapacityUnits: 1
        TableName: ${self:custom.usersTableName}
    StrategiesDynamoDBTable:
      Type: 'AWS::DynamoDB::Table'
      Properties:
        AttributeDefinitions:
          - AttributeName: strategy
            AttributeType: S
        KeySchema:
          - AttributeName: strategy
            KeyType: HASH
        ProvisionedThroughput:
          ReadCapacityUnits: 1
          WriteCapacityUnits: 1
        TableName: ${self:custom.strategiesTableName}
    apiIAMRole: ${file(./IAMroles.yml):apiIAMRole}
    schedulerIAMRole: ${file(./IAMroles.yml):schedulerIAMRole}
    strategyIAMRole: ${file(./IAMroles.yml):strategyIAMRole}
    analysisIAMRole: ${file(./IAMroles.yml):analysisIAMRole}

This is the current file structure.

I'd really love any assistance in fixing this issue as it appears to have persisted from 4.0.3 as mentioned in #161 and is severely impacting having an efficient workflow.

Thanks in advance.

[cgrimal]

Hi @MrTeale, I had the exact same issue, and was using @AndrewFarley's version but since its pull-request has now been merged, you should just use the latest version of the plugin (4.2.2).

If the problem is indeed the same as mine, it should work like a charm!

[MrTeale]

I completely didn't notice that there was a new version released. That has fixed my issue. Thank you so much

[akzincsystems]

still a problem in 2020 (or the days before 2021) with an install only days old

sls deploy function --function myhandler

doesn't work

TypeError: Cannot read property 'artifact' of undefined
at ServerlessPythonRequirements.BbPromise.bind.then.then.then (/home/me/Projects/Python3/api-logon-py/node_modules/serverless-python-requirements/index.js:17
6:48)