A valid service attribute to satisfy the declaration 'self:service.name' could not be found

This is a (Bug Report)

Description

For bug reports:

• What went wrong?

I’m trying to use dynamic variables in serverless.yml and it fails. Basically, I have the following in my provider:

  environment:
    SERVICE_NAME: ${self:service.name}
    DYNAMODB_TABLE: ${self:service.name}-test

The SERVICE_NAME is correctly resolved IF I comment the DYNAMODB_TABLE: "${self:service.name}-test", otherwise it fails with the following stack trace.

If I use ${self:service.name} alone it works, but if I add some string after, then it fails: ${self:service.name}-test

• What did you expect should have happened?

Resolving variables correctly

• What stacktrace or error message from your provider did you see?

➜  simulator-feedback git:(master) ✗ sls print
Serverless: Load command run
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 emit
Serverless: Load command config
Serverless: Load command config:credentials
Serverless: Load command rollback
Serverless: Load command rollback:function
Serverless: Load command webpack
 
 Serverless Warning --------------------------------------
 
  A valid service attribute to satisfy the declaration 'self:service.name' could not be found.
 
 
 Serverless Warning --------------------------------------
 
  A valid service attribute to satisfy the declaration 'self:service.name' could not be found.
 
 
  Serverless Error ---------------------------------------
 
  Trying to populate non string value into a string for variable ${self:service.name}. Please make sure the value of the property is a string.
 
  Stack Trace --------------------------------------------
 
ServerlessError: Trying to populate non string value into a string for variable ${self:service.name}. Please make sure the value of the property is a string.
    at Variables.populateVariable (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:156:13)
    at pendingMatches.push.pendingMatch.then.matchedValue (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:124:21)
    at runCallback (timers.js:789:20)
    at tryOnImmediate (timers.js:751:5)
    at processImmediate [as _immediateCallback] (timers.js:722:5)
From previous event:
    at property.match.forEach (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:122:40)
    at Array.forEach (<anonymous>)
    at Variables.populateProperty (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:111:41)
    at forEachLeaf (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:85:14)
    at forEachLeaf (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:75:14)
    at addContext (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:62:42)
    at /Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:13392:38
    at /Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:4917:15
    at baseForOwn (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:3002:24)
    at Function.mapValues (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:13391:7)
    at forEachLeaf (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:73:37)
    at addContext (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:62:42)
    at /Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:13392:38
    at /Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:4917:15
    at baseForOwn (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:3002:24)
    at Function.mapValues (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:13391:7)
    at forEachLeaf (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:73:37)
    at addContext (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:62:42)
    at /Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:13392:38
    at /Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:4917:15
    at baseForOwn (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:3002:24)
    at Function.mapValues (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/node_modules/lodash/lodash.js:13391:7)
    at forEachLeaf (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:73:37)
    at Variables.populateObject (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:79:5)
    at Variables.populateService (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/classes/Variables.js:47:17)
    at Serverless.run (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/lib/Serverless.js:89:27)
    at serverless.init.then (/Users/vadorequest/.nvm/versions/node/v8.9.4/lib/node_modules/serverless/bin/serverless:42:50)
    at <anonymous>
 
  Get Support --------------------------------------------
     Docs:          docs.serverless.com
     Bugs:          github.com/serverless/serverless/issues
     Forums:        forum.serverless.com
     Chat:          gitter.im/serverless/serverless
 
  Your Environment Information -----------------------------
     OS:                     darwin
     Node Version:           8.9.4
     Serverless Version:     1.26.0

Similar or dependent issues:

• https://github.com/serverless/serverless/issues/3714

Additional Data

• Operating System: MacOS X

[dschep]

Here’s a trick I just figured out for using ${self:service.name} using YAML references:

service: &service
  name: hello                                                                      
custom:
  service: *service

Then use ${self:custom.service.name} instead.

[erikerikson]

The following adds support for the expected-to-be valid references below:

 +    if (variable === 'self:service.name') {
 +      variable = 'self:service';
 +    }
 +    if (variable === 'self:provider') {
 +      variable = 'self:provider.name';
 +    }

This is available on #4754 if you would like to test it out. Others, feel free to object.