Aspnetcore.docs: Unable to generate scaffold movies pages

[lenart17]

I need assistance!
I have cut and paste everything exactly (matter of fact I have done this multiple times) when I got to use the code generator I get the following error:
Building project ...
Finding the generator 'controller'...
Running the generator 'controller'...
Attempting to compile the application in memory.
Attempting to figure out the EntityFramework metadata for the model and DbContext: 'Movie'
Unable to create an object of type 'MvcMovieContext'. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728 StackTrace:
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.<>c__DisplayClass13_3.<FindContextTypes>b__13()
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(Func`1 factory)
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.CreateContext(String contextType)
at Microsoft.EntityFrameworkCore.Design.DbContextActivator.CreateInstance(Type contextType, Assembly startupAssembly, IOperationReportHandler reportHandler)
at Microsoft.VisualStudio.Web.CodeGeneration.EntityFrameworkCore.EntityFrameworkModelProcessor.TryCreateContextUsingAppCode(Type dbContextType, Type startupType)

No parameterless constructor defined for type 'MvcMovie.Data.MvcMovieContext'. StackTrace:
at System.RuntimeType.CreateInstanceDefaultCtorSlow(Boolean publicOnly, Boolean wrapExceptions, Boolean fillCache)
No parameterless constructor defined for type 'MvcMovie.Data.MvcMovieContext'.
at System.RuntimeType.CreateInstanceDefaultCtor(Boolean publicOnly, Boolean skipCheckThis, Boolean fillCache, Boolean wrapExceptions)
at System.Activator.CreateInstance(Type type, Boolean nonPublic, Boolean wrapExceptions)
at System.Activator.CreateInstance(Type type)
at Microsoft.EntityFrameworkCore.Design.Internal.DbContextOperations.<>c__DisplayClass13_3.<FindContextTypes>b__13()

at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.<BuildCommandLine>b__6_0()
at Microsoft.Extensions.CommandLineUtils.CommandLineApplication.Execute(String[] args)
at Microsoft.VisualStudio.Web.CodeGeneration.ActionInvoker.Execute(String[] args)
at Microsoft.VisualStudio.Web.CodeGeneration.CodeGenCommand.Execute(String[] args)
RunTime 00:00:04.53

Any ideas?

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Document Details

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• ID: 1d975a83-1550-b284-d0d8-7fe2ea206ff5
• Version Independent ID: 48e81b42-7c2b-afbf-71e6-d4f442a4bd1f
• Content: Add a model to an ASP.NET Core MVC app
• Content Source: aspnetcore/tutorials/first-mvc-app/adding-model.md
• Product: aspnet-core
• Technology: aspnetcore-tutorials
• GitHub Login: @Rick-Anderson
• Microsoft Alias: riande

[Rick-Anderson]

The tutorial works. I'm not sure what step you missed. You might try asking on StackOverflow,.

[fosrock]

I type my code and found that I missed a comma from the appsettings.json file. Suggest paying attention to compiler warnings too :)