I am trying to run abp suite and the it creats all the code but throws an error at migration and says System.NullReferenceException: Object reference not set to an instance of an object. Can you please point me what could be wrong ? and Can you point me in the direction that I have to look for the issue. Thanks Below is the log:
Volo.Abp.UserFriendlyException: Error occurred on DB migration step: Build started...
Build succeeded.
[10:25:03 FTL] Host terminated unexpectedly!
Microsoft.Extensions.Hosting.HostAbortedException: The host was aborted.
at Microsoft.Extensions.Hosting.HostFactoryResolver.HostingListener.ThrowHostAborted()
at Microsoft.Extensions.Hosting.HostFactoryResolver.HostingListener.OnNext(KeyValuePair2 value) at System.Diagnostics.DiagnosticListener.Write(String name, Object value) at Microsoft.Extensions.Hosting.HostBuilder.ResolveHost(IServiceProvider serviceProvider, DiagnosticListener diagnosticListener) at Microsoft.Extensions.Hosting.HostApplicationBuilder.Build() at Microsoft.AspNetCore.Builder.WebApplicationBuilder.Build() at BoardRoom.ClientService.Web.Program.Main(String[] args) in C:\Projects\ZestLabs\Code\BSCS2Code_ZLSandeep\src\BoardRoom.ClientService.Web\Program.cs:line 41 System.NullReferenceException: Object reference not set to an instance of an object. at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.Initialize(ColumnOperation columnOperation, IColumn column, RelationalTypeMapping typeMapping, Boolean isNullable, IEnumerable1 migrationsAnnotations, Boolean inline)
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.InitializeColumnHelper(ColumnOperation columnOperation, IColumn column, Boolean inline)
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.Diff(IColumn source, IColumn target, DiffContext diffContext)+MoveNext()
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.DiffCollection[T](IEnumerable1 sources, IEnumerable1 targets, DiffContext diffContext, Func4 diff, Func3 add, Func3 remove, Func4[] predicates)+MoveNext()
at System.Linq.Enumerable.ConcatIterator1.MoveNext() at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.Diff(ITable source, ITable target, DiffContext diffContext)+MoveNext() at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.DiffCollection[T](IEnumerable1 sources, IEnumerable1 targets, DiffContext diffContext, Func4 diff, Func3 add, Func3 remove, Func4[] predicates)+MoveNext() at System.Linq.Enumerable.ConcatIterator1.MoveNext()
at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.Sort(IEnumerable1 operations, DiffContext diffContext) at Microsoft.EntityFrameworkCore.Migrations.Internal.MigrationsModelDiffer.GetDifferences(IRelationalModel source, IRelationalModel target) at Microsoft.EntityFrameworkCore.Migrations.Design.MigrationsScaffolder.ScaffoldMigration(String migrationName, String rootNamespace, String subNamespace, String language) at Microsoft.EntityFrameworkCore.Design.Internal.MigrationsOperations.AddMigration(String name, String outputDir, String contextType, String namespace) at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigrationImpl(String name, String outputDir, String contextType, String namespace) at Microsoft.EntityFrameworkCore.Design.OperationExecutor.AddMigration.<>c__DisplayClass0_0.<.ctor>b__0() at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_01.<Execute>b__0()
at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
Object reference not set to an instance of an object.
at Volo.Abp.Suite.Areas.AbpSuite.CrudPageGenerator.Commands.DbMigrationCommand.ExecuteAsync(CrudPageCommandOptions options) at Volo.Abp.Suite.Areas.AbpSuite.CrudPageGenerator.CommandManager.ExecuteAllAsync(CrudPageCommandOptions options) at Volo.Abp.Suite.Areas.AbpSuite.CrudPageGenerator.Commands.CrudPageGenerator.GenerateAsync(EntityModel entity, Solution solution) at Volo.Abp.Suite.Controllers.CrudPageGeneratorController.SaveAndGenerateEntityAsync(Guid solutionId, EntityModel entity) at lambda_method2001(Closure, Object) at Microsoft.AspNetCore.Mvc.Infrastructure.ActionMethodExecutor.TaskOfActionResultExecutor.Execute(ActionContext actionContext, IActionResultTypeMapper mapper, ObjectMethodExecutor executor, Object controller, Object[] arguments) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.<InvokeActionMethodAsync>g__Awaited|12_0(ControllerActionInvoker invoker, ValueTask`1 actionResultValueTask) at Microsoft.AspNetCore.Mvc.Infrastructure.ControllerActionInvoker.
3 Answer(s)
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0
Can you share the following information?
- ABP Framework version: vX.X.X
- UI type: Angular / MVC / Blazor
- DB provider: EF Core / MongoDB
- And the properties of the entity that you are generating:
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0
Can you share the following information?
ABP Framework version: v7.0.1
UI type: MVC / Razor
DB provider: EF Core
I am editing an existing entity, but the suite was run on two different machines and some of the entities were created in a different machine
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0
Hi @vishnu,
The problem is related with the DbMigrator project in your solution. Are you able to run it successfully before generating code with ABP Suite?
I am editing an existing entity
Have you made any breaking change in the edit, that may not be compatible with the current records in DB?
