Mike Lee

넵 알려주신대로 하니까, Error가 Clear되었습니다. 빠른 응답 대단히 감사합니다.&nbsp;

TypeError: Cannot read property 'tap' of undefined

dotnet ef database update라고 치며는 다음과 같은 Error가 나오네요.&nbsp;
혹시 이유를 알수 있을까요?

An error occurred while calling method 'BuildWebHost' on class 'Program'. Continuing without the application service provider. Error: One or more errors occurred. (Invalid object name 'Teachers'.)
Unable to create an object of type 'MyAppContext'. Add an implementation of 'IDesignTimeDbContextFactory<MyAppContext>' to the project, or see https://go.microsoft.com/fwlink/?linkid=851728 for additional patterns supported at design time.

Mike Lee

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