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Bug Report T1057381
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DataSource - The "Type 'null' is not assignable to type 'string | any[] | DataSource<any, any> | Options<any, any, any, any> | Store<any, any>'" error occurs on an attempt to build the application when strict compiler options are used

created 3 years ago (modified 3 years ago)

Steps to reproduce:

  1. Use the following construction:
HTML
<dx-data-grid
  id="gridContainer"
  keyExpr="OrderID"
  [dataSource]="orders$ | async"
  1. Use the strict mode:
JavaScript
"compilerOptions": {
  "baseUrl": "./",
  "outDir": "./dist/out-tsc",
  "forceConsistentCasingInFileNames": true,
  "strict": true,
  1. Use the ng build command to build the application

Expected results:
No errors.

Current results:
The '' error occurs
Clipboard-File-1.png

Additional information:
Use the following configuration to resolve the issue:

JavaScript
"angularCompilerOptions": {
   "strictNullChecks": false
 }
Comments (2)
G G
GED 3 years ago

    Any update on this?

    Oliver Sturm (DevExpress) 3 years ago

      Hi,

      We started our research, but don't have any results yet. We'll update this thread once we have news. Please bear with us.

      Sign in to comment on this post

      Answers approved by DevExpress Support

      created 3 years ago

      We have addressed the issue described in this ticket and will include a fix in our next maintenance update. Should you need to apply our fix prior to official release, you can request a hotfix here.

      Important Notes:

      • Hotfixes may be unavailable for Early Access/Beta builds or updates set for release within a week.
      • .NET only: in the NuGet Package Manager, use your personal NuGet feed and check the "Include prerelease" option to view the hotfix package in the "Updates" tab.
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