Nest JS encountering an error due to an undefined property

Recently, my application was running smoothly until I attempted to fetch the documentation using Swagger. It seems like there might be a dependency issue causing it to stop working, but I can't pinpoint the root of the problem.

An error message keeps popping up:

10:10:22 PM - Starting compilation in watch mode...

Error Cannot read property 'getSymbol' of undefined

I am unsure where 'getSymbol' is utilized within the code, and the error message itself isn't offering much guidance. I'm hopeful that someone can assist me in resolving this issue. You can access the complete source code of the application at:

https://github.com/JSLearningCode/enderecosAlunosAPI

Any help or insights would be greatly appreciated.

UPDATE: While running in development mode, I encountered the following output:

/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/typescript/lib/typescript.js:95877 throw e; ^

TypeError: Cannot read property 'getSymbol' of undefined at Object.isArray (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/@nestjs/swagger/dist/plugin/utils/ast-utils.js:6:25) at getTypeReferenceAsString (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/@nestjs/swagger/dist/plugin/utils/plugin-utils.js:12:21) at Object.getTypeReferenceAsString (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/@nestjs/swagger/dist/plugin/utils/plugin-utils.js:31:29) at ControllerClassVisitor.createTypePropertyAssignment (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/@nestjs/swagger/dist/plugin/visitors/controller-class.visitor.js:51:44) at ControllerClassVisitor.createDecoratorObjectLiteralExpr (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/@nestjs/swagger/dist/plugin/visitors/controller-class.visitor.js:38:18) at ControllerClassVisitor.addDecoratorToNode (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/@nestjs/swagger/dist/plugin/visitors/controller-class.visitor.js:29:22) at visitNode (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/@nestjs/swagger/dist/plugin/visitors/controller-class.visitor.js:16:29) at visitNodes (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/typescript/lib/typescript.js:70998:48) at Object.visitEachChild (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/typescript/lib/typescript.js:71266:355) at visitNode (/home/william/Documentos/lemobs/enderecosAlunosAPI/node_modules/@nestjs/swagger/dist/plugin/visitors/controller-class.visitor.js:18:23) error Command failed with exit code 1.

javascripttypescriptswaggerundefined

Answer №1

An obstacle arose concerning the application's routing. Within the controller, I had a parser in place to guide the correct routes for a route labeled "aluno" with the first parameter. After rearranging the routes in the controller and placing the one without parameters at the beginning, the need for the parser vanished, resolving the issue. I hope this explanation proves beneficial to others encountering a similar problem.

Answer №2

Unfortunately, the current solution is not functioning as expected. This could be due to an update in the nestjs swagger plugin.

Previous response:

We recommend verifying the result type of your controller's method

Make this adjustment:

@Contoller()
export class MyController {

// ...
  async myMethod() {
    return {}
  }
}

to:

@Contoller()
export class MyController {

// ...
  async myMethod():Promise<any> {
    return {}
  }
}

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