EntityFrameworkCore.Triggered and ABP? #1417 | Support Center | ABP Commercial

hansmogren created 3 years ago

I want to use https://github.com/koenbeuk/EntityFrameworkCore.Triggered in my ABP solution but I can't figure out how to register the triggers with my AbpDbContext.

This is what the documentation for EntityFrameworkCore.Triggered suggests:

public class Startup
{
    public void ConfigureServices(IServiceCollection services)
    {
        services
            .AddDbContext<ApplicationContext>(options => {
                options.UseTriggers(triggerOptions => {
                    triggerOptions.AddTrigger<MyTrigger>();
                });
            })
    }
}

How can I use this library with with ABP?

10 Answer(s)

liangshiwei created 3 years ago

Support Team Fullstack Developer

Hi,

Open *.EntityFrameworkCoreModule and find Configure<AbpDbContextOptions>:

Configure<AbpDbContextOptions>(options =>
{
    /* The main point to change your DBMS.
     * See also MyProjectNameMigrationsDbContextFactory for EF Core tooling. */
    options.UseSqlServer();

    options.Configure(c =>
    {
        c.DbContextOptions.UseTriggers();
    });
});

hansmogren created 3 years ago

Thanks! However, when I try that I get an error on application start:

An unhandled exception occurred while processing the request. InvalidOperationException: No database provider has been configured for this DbContext. A provider can be configured by overriding the 'DbContext.OnConfiguring' method or by using 'AddDbContext' on the application service provider. If 'AddDbContext' is used, then also ensure that your DbContext type accepts a DbContextOptions<TContext> object in its constructor and passes it to the base constructor for DbContext.

Microsoft.EntityFrameworkCore.Internal.DbContextServices.Initialize(IServiceProvider scopedProvider, IDbContextOptions contextOptions, DbContext context)

Stack trace:

<br>

InvalidOperationException: No database provider has been configured for this DbContext. A provider can be configured by overriding the 'DbContext.OnConfiguring' method or by using 'AddDbContext' on the application service provider. If 'AddDbContext' is used, then also ensure that your DbContext type accepts a DbContextOptions<TContext> object in its constructor and passes it to the base constructor for DbContext.

    Microsoft.EntityFrameworkCore.Internal.DbContextServices.Initialize(IServiceProvider scopedProvider, IDbContextOptions contextOptions, DbContext context)
    Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
    Microsoft.EntityFrameworkCore.DbContext.get_ChangeTracker()
    Volo.Abp.EntityFrameworkCore.AbpDbContext<TDbContext>.Initialize(AbpEfCoreDbContextInitializationContext initializationContext)
    Volo.Abp.Uow.EntityFrameworkCore.UnitOfWorkDbContextProvider<TDbContext>.CreateDbContextAsync(IUnitOfWork unitOfWork, string connectionStringName, string connectionString)
    Volo.Abp.Uow.EntityFrameworkCore.UnitOfWorkDbContextProvider<TDbContext>.GetDbContextAsync()
    Volo.Abp.Domain.Repositories.EntityFrameworkCore.EfCoreRepository<TDbContext, TEntity>.GetDbSetAsync()
    Volo.Abp.LanguageManagement.EntityFrameworkCore.EfCoreLanguageRepository.GetListAsync(bool isEnabled)
    Castle.DynamicProxy.AsyncInterceptorBase.ProceedAsynchronous<TResult>(IInvocation invocation, IInvocationProceedInfo proceedInfo)
    Volo.Abp.Castle.DynamicProxy.CastleAbpMethodInvocationAdapterWithReturnValue<TResult>.ProceedAsync()
    Volo.Abp.Uow.UnitOfWorkInterceptor.InterceptAsync(IAbpMethodInvocation invocation)
    Volo.Abp.Castle.DynamicProxy.CastleAsyncAbpInterceptorAdapter<TInterceptor>.InterceptAsync<TResult>(IInvocation invocation, IInvocationProceedInfo proceedInfo, Func<IInvocation, IInvocationProceedInfo, Task<TResult>> proceed)
    Volo.Abp.LanguageManagement.DatabaseLanguageProvider.oBPl0rvdv()
    Volo.Abp.Caching.DistributedCache<TCacheItem, TCacheKey>.GetOrAddAsync(TCacheKey key, Func<Task<TCacheItem>> factory, Func<DistributedCacheEntryOptions> optionsFactory, Nullable<bool> hideErrors, bool considerUow, CancellationToken token)
    Volo.Abp.LanguageManagement.DatabaseLanguageProvider.GetLanguagesAsync()
    Microsoft.AspNetCore.RequestLocalization.DefaultAbpRequestLocalizationOptionsProvider.GetLocalizationOptionsAsync()
    Microsoft.AspNetCore.RequestLocalization.AbpRequestLocalizationMiddleware.InvokeAsync(HttpContext context, RequestDelegate next)
    Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+<>c__DisplayClass6_1+<<UseMiddlewareInterface>b__1>d.MoveNext()
    Microsoft.AspNetCore.Diagnostics.DeveloperExceptionPageMiddleware.Invoke(HttpContext context)

liangshiwei created 3 years ago

Support Team Fullstack Developer

Try:

Configure<AbpDbContextOptions>(options =>
{
    options.Configure(c =>
    {
        c.UseSqlServer();
        c.DbContextOptions.UseTriggers();
    });
});

0
hansmogren created 3 years ago
Thanks, that change made the trigger be registered and triggered.

However the dependency injection failed while instantiating my trigger class. I am injecting an IRepository into it and got an exception: System.InvalidOperationException: 'Unable to resolve service for type 'MyProjectName.IMyEntityRepository' while attempting to activate 'MyProjectName.BeforeSaveTrigger'.'

I solved this by including the line t.UseApplicationScopedServiceProviderAccessor(_ => context.Services.GetServiceProviderOrNull()); as below since the the documentation at https://github.com/koenbeuk/EntityFrameworkCore.Triggered/wiki/Dependency-injection mentions this solution:

Configure a method that returns the current relevant ServiceProvider. This can be done by providing a method through: triggerOptions.UseApplicationScopedServiceProviderAccessor(sp => ...). The first argument will be either the application ServiceProvider if available or otherwise the internal service provider.

Does this seem like a reasonable solution or will it break something?

options.Configure(c => { c.UseSqlServer(); c.DbContextOptions.UseTriggers(t => { t.UseApplicationScopedServiceProviderAccessor(_ => context.Services.GetServiceProviderOrNull()); t.AddTrigger<BeforeSaveTrigger>(); }); });

liangshiwei created 3 years ago

Support Team Fullstack Developer

hi,

This way will be better

c.DbContextOptions.UseTriggers(t =>
{
    t.UseApplicationScopedServiceProviderAccessor(_ => _.GetRequiredService<IHttpContextAccessor>().HttpContext?.RequestServices);
});

0
hansmogren created 3 years ago
c.DbContextOptions.UseTriggers(t => { t.UseApplicationScopedServiceProviderAccessor(_ => _.GetRequiredService<IHttpContextAccessor>().HttpContext?.RequestServices); });

Doing this way I get System.InvalidOperationException: 'No service for type 'Microsoft.AspNetCore.Http.IHttpContextAccessor' has been registered.' on application start.

liangshiwei created 3 years ago

Support Team Fullstack Developer

After my test, the following code is ok.

Configure<AbpDbContextOptions>(options =>
{

    options.Configure(c =>
    {
        c.UseSqlServer();
        c.DbContextOptions.UseTriggers(t =>
        {
            t.UseApplicationScopedServiceProviderAccessor(_ => _.CreateScope().ServiceProvider);
        });

    });
});

0

hansmogren created 3 years ago

After my test, the following code is ok.

Sorry, but I get System.InvalidOperationException: 'Unable to resolve service for type 'MyProjectName.IMyEntityRepository' while attempting to activate 'MyProjectName.BeforeSaveTrigger'.' doing it this way as well.
0

liangshiwei created 3 years ago
Support Team Fullstack Developer

Can you share the full logs?
0

ServiceBot created 2 years ago
Support Team Automatic process manager

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