This is a simple trigger implementation in efcore that you can create for your entities.
dotnet add package EFTriggerHelper --version 1.0.0
- copy and paste in your db context the override of savechanges in the following example.
public class DummyContext : DbContext
{
public DbSet<PersonTbl> Person { get; set; }
private DbContextTriggerHelper helper = new DbContextTriggerHelper(typeof(PersonTrigger).Assembly);
public override int SaveChanges()
{
Func<int> handler = () => base.SaveChanges();
return this.EFTriggerHelperSaveChanges(handler, helper);
}
public override int SaveChanges(bool acceptAllChangesOnSuccess)
{
Func<int> handler = () => base.SaveChanges(acceptAllChangesOnSuccess);
return this.EFTriggerHelperSaveChanges(handler, helper);
}
public override async Task<int> SaveChangesAsync(bool acceptAllChangesOnSuccess, CancellationToken cancellationToken = default(CancellationToken))
{
Func<Task<int>> handler = async () => await base.SaveChangesAsync(acceptAllChangesOnSuccess, cancellationToken);
return await this.EFTriggerHelperSaveChangesAsync(handler, helper);
}
public override async Task<int> SaveChangesAsync(CancellationToken cancellationToken = default(CancellationToken))
{
Func<Task<int>> handler = async () => await base.SaveChangesAsync(cancellationToken);
return await this.EFTriggerHelperSaveChangesAsync(handler, helper);
}
}- Define a class that implements the following interfaces. (Every sync interface has a async interface. The IBeforeCreate is sync and the async interface is IBeforeCreateAsync, it will be the same for the rest of the interfaces)
public class PersonTrigger :
IBeforeCreateAsync<PersonTbl>,
IBeforeCreate<PersonTbl>,
IAfterCreate<PersonTbl>,
IBeforeUpdate<PersonTbl>,
IAfterUpdate<PersonTbl>,
IBeforeDelete<PersonTbl>,
IAfterDelete<PersonTbl>
{
public async Task BeforeCreateAsync(DbContext context, IEnumerable<PersonTbl> entities) => Console.WriteLine("before create async");
public void BeforeCreate(DbContext context, IEnumerable<PersonTbl> entities)
{
Console.WriteLine("before create executed");
entities.First().CreatedDate = DateTime.Now;
}
public void AfterCreate(DbContext context, IEnumerable<PersonTbl> entities) => Console.WriteLine("after create executed");
public void BeforeUpdate(DbContext context, IEnumerable<PersonTbl> entities)
{
Console.WriteLine("before update executed");
entities.First().ModifiedDate = DateTime.Now;
entities.First().ModifiyBy = "TEST";
}
public void AfterUpdate(DbContext context, IEnumerable<PersonTbl> entities) => Console.WriteLine("after update executed");
public void BeforeDelete(DbContext context, IEnumerable<PersonTbl> entities) => Console.WriteLine("before delete executed");
public void AfterDelete(DbContext context, IEnumerable<PersonTbl> entities) => Console.WriteLine("after delete executed");
}- Make sure to pass as parameter the assembly of one concrete trigger class.
- Make sure to organize your trigger classes in one assembly.
private DbContextTriggerHelper helper = helper = new DbContextTriggerHelper(typeof(PersonTrigger).Assembly);Execute triggers by calling SaveChanges or SaveChangesAsync() in the derived DbContext
public class PersonController : Controller
public IActionResult CreatePerson(PersonTbl person)
{
yourDbContext.Person.Add(person);
YourDbContext.SaveChanges() // or await yourDbContext.SaveChangesAsync()
}Please open an issue for support.
MIT License
Copyright (c) [2019] [Hector Mota]
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