Object map style cannot use getType to match action in the createReducer

[cloudshadow]

Description

When i use object map style to create reducer i find ts can not get the type of action and state.

Mandatory info

How to Reproduce

CodeSandbox Link

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If no codesandbox, then please provide a full working code example below including actions, reducers and your custom types used in the example.

// this code is not work
export const reducer = createReducer<ITypeState, ITypeActions>(defaultTypeState, {
  [getType(rootAction.someActions.success)]: (state, action) =>
    produce(state, draft => {
      // todo
    })
});

// this code is work
export const reducer = createReducer<ITypeState, ITypeActions>(defaultTypeState, {
  ['Success']: (state, action) =>
    produce(state, draft => {
      // todo
    })
});

Expected behavior

when use getType function in object map style ts can get the correct type for action and state

Suggested solution(s)

Project Dependencies

• Typesafe-Actions Version: 5.2.0
• TypeScript Version: 3.6.3
• tsconfig.json:

{
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist",
    "paths": {
      "@/*": ["src/*"]
    },
    "module": "es2015",
    "target": "es2015",
    "lib": ["es6", "dom"],
    "sourceMap": true,
    "allowJs": true,
    "jsx": "react",
    "moduleResolution": "node",
    "forceConsistentCasingInFileNames": true,
    "noImplicitReturns": true,
    "noImplicitThis": true,
    "noImplicitAny": true,
    "importHelpers": true,
    "strictNullChecks": true,
    "suppressImplicitAnyIndexErrors": true,
    "noUnusedLocals": true
  },
  "exclude": [
    "node_modules",
    "build",
    "scripts",
    "acceptance-tests",
    "webpack",
    "jest",
    "src/setupTests.ts"
  ]
}

[piotrwitek]

Hi @cloudshadow Report is invalid because it's missing info bug I guess rootAction.someActions.success is not a correct string literal type.

Please follow the bug report template and I will reopen the issue.

provide a full working code example below including actions, reducers and your custom types used in the example.

[cloudshadow]

Hi Piotrwitek i think rootAction.someActions.success is correct

[piotrwitek]

@cloudshadow Ok I have found the reason, it's a reported bug in TypeScript: https://github.com/microsoft/TypeScript/issues/29718

I would recommend to go there and ask in the issue when are they planning to fix it to show the interest coming from the community.

Related issue: #140

TODO: I have to update the documentation to highlight the bug and link to the TypeScript issue