Failed to change styleExt via cli

[andrelmp]

Please provide us with the following information:

1. OS? Windows 7, 8 or 10. Linux (which distribution). Mac OSX (Yosemite? El Capitan?)
   Windows 10 (x64)
2. Versions. Please run ng --version. If there's nothing outputted, please run
   in a Terminal: node --version and paste the result here:

angular-cli: local (v1.0.0-beta.11-webpack.8, branch: master)
node: 6.4.0
os: win32 x64

1. Repro steps. Was this an app that wasn't created using the CLI? What change did you
   do on your code? etc.
   Crete a new project using: ng new Teste --style=sass
   then run ng set defaults.styleExt scss
2. The log given by the failure. Normally this include a stack trace and some
   more information.

Cannot read property 'serialize' of undefined
TypeError: Cannot read property 'serialize' of undefined
    at D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:235:87
    at JsonSerializer.property (D:\github\angular-cli\addon\ng2\models\json-schema\serializer.ts:100:9)
    at _loop_1 (D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:235:32)
    at D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:240:17
    at JsonSerializer.object (D:\github\angular-cli\addon\ng2\models\json-schema\serializer.ts:88:9)
    at ObjectSchemaTreeNode.serialize (D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:227:20)
    at D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:231:92
    at JsonSerializer.property (D:\github\angular-cli\addon\ng2\models\json-schema\serializer.ts:100:9)
    at _loop_1 (D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:231:36)
    at D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:240:17
    at JsonSerializer.object (D:\github\angular-cli\addon\ng2\models\json-schema\serializer.ts:88:9)
    at ObjectSchemaTreeNode.serialize (D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:227:20)
    at D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:293:33
    at JsonSerializer.array (D:\github\angular-cli\addon\ng2\models\json-schema\serializer.ts:107:9)
    at ArraySchemaTreeNode.serialize (D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:291:20)
    at D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:231:92
    at JsonSerializer.property (D:\github\angular-cli\addon\ng2\models\json-schema\serializer.ts:100:9)
    at _loop_1 (D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:231:36)
    at D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:240:17
    at JsonSerializer.object (D:\github\angular-cli\addon\ng2\models\json-schema\serializer.ts:88:9)
    at RootSchemaTreeNode.ObjectSchemaTreeNode.serialize (D:\github\angular-cli\addon\ng2\models\json-schema\schema-tree.ts:227:20)
    at GeneratedSchemaClass.SchemaClassBase.$$serialize (D:\github\angular-cli\addon\ng2\models\json-schema\schema-class-factory.ts:141:25)

1. Mention any other details that might be useful.

---

Thanks! We'll be in touch soon.

[pinoyyid]

Me too. Ubuntu 16.04
ng --version
Could not start watchman; falling back to NodeWatcher for file system events.
Visit http://ember-cli.com/user-guide/#watchman for more info.
angular-cli: 1.0.0-beta.14
node: 6.2.2
os: linux x64

[leprkhn]

I also have this problem.

Mint 18 (Ubuntu 16.04)

ng --version

Could not start watchman; falling back to NodeWatcher for file system events.
Visit http://ember-cli.com/user-guide/#watchman for more info.
angular-cli: 1.0.0-beta.14
node: 6.6.0
os: linux x64

ng set defaults.styleExt scss

Could not start watchman; falling back to NodeWatcher for file system events.
Visit http://ember-cli.com/user-guide/#watchman for more info.
Cannot read property 'serialize' of undefined
TypeError: Cannot read property 'serialize' of undefined
    at /home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:235:87
    at JsonSerializer.property (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/serializer.js:100:9)
    at _loop_1 (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:235:32)
    at /home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:240:17
    at JsonSerializer.object (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/serializer.js:88:9)
    at ObjectSchemaTreeNode.serialize (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:227:20)
    at /home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:231:92
    at JsonSerializer.property (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/serializer.js:100:9)
    at _loop_1 (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:231:36)
    at /home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:240:17
    at JsonSerializer.object (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/serializer.js:88:9)
    at ObjectSchemaTreeNode.serialize (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:227:20)
    at /home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:293:33
    at JsonSerializer.array (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/serializer.js:107:9)
    at ArraySchemaTreeNode.serialize (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:291:20)
    at /home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:231:92
    at JsonSerializer.property (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/serializer.js:100:9)
    at _loop_1 (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:231:36)
    at /home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:240:17
    at JsonSerializer.object (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/serializer.js:88:9)
    at RootSchemaTreeNode.ObjectSchemaTreeNode.serialize (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-tree.js:227:20)
    at GeneratedSchemaClass.SchemaClassBase.$$serialize (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/json-schema/schema-class-factory.js:141:25)
    at CliConfig.serialize (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/config/config.js:37:29)
    at CliConfig.save (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/models/config/config.js:33:44)
    at /home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/commands/set.js:49:20
    at Class.run (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/commands/set.js:31:16)
    at Class.<anonymous> (/home/leprkhn/Projects/angular2-hackernews/node_modules/angular-cli/lib/models/command.js:152:17)
    at tryCatch (/home/leprkhn/Projects/angular2-hackernews/node_modules/rsvp/dist/lib/rsvp/-internal.js:215:12)
    at invokeCallback (/home/leprkhn/Projects/angular2-hackernews/node_modules/rsvp/dist/lib/rsvp/-internal.js:230:13)
    at publish (/home/leprkhn/Projects/angular2-hackernews/node_modules/rsvp/dist/lib/rsvp/-internal.js:198:7)
    at flush (/home/leprkhn/Projects/angular2-hackernews/node_modules/rsvp/dist/lib/rsvp/asap.js:82:5)
    at _combinedTickCallback (internal/process/next_tick.js:67:7)
    at process._tickCallback (internal/process/next_tick.js:98:9)

My current workaround is to edit

./angular-cli.json

From

"defaults": {
    "styleExt": "css"
}

To

"defaults": {
    "styleExt": "scss"
}

And

./app/app.component.ts

From

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})

To

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.scss']
})

And finally rename ./app/app.component.css to ./app/app.component.scss

[filipesilva]

Dupe of #1900

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