Getting “inject() must be called from an injection context” after upgrading to Angular 11

问题

After upgrading to Angular 11, I am not able to ng serve my web application anymore.

I am generating the client using Spring Doc and the latest OpenAPI generator gradle-plutin (5.0.0).

The problem appears to be related to my (generated) REST-client. Opening https://localhost:4200 will write the following into the console:

main.ts:12 Error: inject() must be called from an injection context
    at injectInjectorOnly (core.js:4901) [angular]
    at Module.ɵɵinject (core.js:4911) [angular]
    at Object.ApiModule_Factory [as factory] (meditation-rest-client.js:2885) [angular]
    at R3Injector.hydrate (core.js:11158) [angular]
    at R3Injector.get (core.js:10979) [angular]
    at :4200/vendor.js:82591:55 [angular]
    at Set.forEach (<anonymous>) [angular]
    at R3Injector._resolveInjectorDefTypes (core.js:11016) [angular]
    at new NgModuleRef$1 (core.js:25046) [angular]
    at NgModuleFactory$1.create (core.js:25100) [angular]
    at :4200/vendor.js:100468:45 [angular]
    at Object.onInvoke (core.js:28301) [angular]

The following is my tsconfig.json file:

/* To learn more about this file see: https://angular.io/config/tsconfig. */
{
  "compileOnSave": false,
  "compilerOptions": {
    "baseUrl": "./",
    "outDir": "./dist/out-tsc",
    "sourceMap": true,
    "declaration": false,
    "downlevelIteration": true,
    "experimentalDecorators": true,
    "moduleResolution": "node",
    "importHelpers": true,
    "target": "es2015",
    "module": "es2020",
    "lib": [
      "es2018",
      "dom"
    ]
  }
}

This is how I define the dependency in package.json

    "chart.js": "^2.9.4",
    "core-js": "^3.8.2",
    "meditation-rest-client": "./generated/meditation-rest-client",
    "http-server": "^0.12.3",
    "http-status-codes": "^2.1.4",
    "moment": "^2.29.1",

And this here are those generated lines which are reffered to in the error message above:

// ...

ApiModule.ɵmod = ɵngcc0.ɵɵdefineNgModule({ type: ApiModule });
ApiModule.ɵinj = ɵngcc0.ɵɵdefineInjector({ factory: function ApiModule_Factory(t) { return new (t || ApiModule)(ɵngcc0.ɵɵinject(ApiModule, 12), ɵngcc0.ɵɵinject(ɵngcc1.HttpClient, 8)); }, providers: [], imports: [[]] });
ApiModule.ctorParameters = () => [
    { type: ApiModule, decorators: [{ type: Optional }, { type: SkipSelf }] },
    { type: HttpClient, decorators: [{ type: Optional }] }
];

// ...

This used to work in Angular 9 but it won't under Angular 11.

Any idea how to fix this? I already tried setting "preserveSymlinks": true as suggested here and here.

Please let me know if you need more information.

回答1:

The issue could arise due to the generated npm package builds into some output folder /generated/meditation-rest-client. When being referenced by the frontend application, the api package resolves the import @angular/core to /generated/meditation-rest-client/node_modules/@angular/core, differing from the /node_modules/@angular/core in the project root.

The resolution would be to delete the /generated/meditation-rest-client/node_modules folder and the node_modules folder in the parents, except for the <project-root>/node_modules. Alternatively, the generated code /generated/meditation-rest-client should be copied to some location where no parent folder contains an node_modules folder.

See https://github.com/OpenAPITools/openapi-generator/issues/8447

来源：https://stackoverflow.com/questions/65709951/getting-inject-must-be-called-from-an-injection-context-after-upgrading-to-a

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angular

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