I having an issue when applying a migration with some data on it. The EF console is returning Stackoverflow for some reason I don't know. I think it's a problem with seeding CompanyType data because without it, the migrations and database update occurs normal. When I added the seed, it started to return this.
AppDbContext:
public class AppDbContext : DbContext
{
public AppDbContext(DbContextOptions options) : base(options) { }
public DbSet<Address> Addresses { get; set; }
public DbSet<Taker> Takers { get; set; }
public DbSet<Invoice> Invoices { get; set; }
public DbSet<Provider> Providers { get; set; }
public DbSet<ServiceType> ServiceTypes { get; set; }
public DbSet<CompanyType> CompanyTypes { get; set; }
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
modelBuilder.ApplyConfiguration(new AddressConfiguration());
modelBuilder.ApplyConfiguration(new CompanyTypeConfiguration());
modelBuilder.ApplyConfiguration(new InvoiceConfiguration());
modelBuilder.ApplyConfiguration(new ProviderConfiguration());
modelBuilder.ApplyConfiguration(new ServiceTypeConfiguration());
modelBuilder.ApplyConfiguration(new TakerConfiguration());
modelBuilder.Entity<CompanyType>().HasData(
new CompanyType()
{
Id = Guid.NewGuid(),
CreatedAt = DateTime.UtcNow,
Name = "Individual Business",
Description = "This type of company is free from tax applications",
TaxRate = 0.0M
},
new CompanyType()
{
Id = Guid.NewGuid(),
CreatedAt = DateTime.UtcNow,
Name = "Small Company",
Description = "Small company that is beginning",
TaxRate = 2.5M
},
new CompanyType()
{
Id = Guid.NewGuid(),
CreatedAt = DateTime.UtcNow,
Name = "Medium Company",
Description = "Mid-port company",
TaxRate = 4.5M
},
new CompanyType()
{
Id = Guid.NewGuid(),
CreatedAt = DateTime.UtcNow,
Name = "Large Company",
Description = "Large company with more branches",
TaxRate = 7.5M
});
base.OnModelCreating(modelBuilder);
}
}
CompanyType configuration class:
public class CompanyTypeConfiguration : IEntityTypeConfiguration<CompanyType>
{
public void Configure(EntityTypeBuilder<CompanyType> builder)
{
//The Id property inherits from the BaseEntity
builder.HasKey(x => x.Id);
builder.Property(x => x.Name)
.IsRequired()
.HasMaxLength(30);
builder.Property(x => x.Description)
.IsRequired();
builder.Property(x => x.TaxRate)
.IsRequired();
}
}
CompanyType class:
public class CompanyType : BaseEntity
{
public string Name { get; set; }
public string Description { get; set; }
public decimal TaxRate { get; set; }
}
Console output:
I found the solution. It was a very silly error in the BaseEntity class, since CompanyType inherits it.
In the get property I put the public string itself to return, instead of the "_createdAt" private field.
public abstract class BaseEntity
{
[Key]
public Guid Id { get; set; }
private DateTime? _createdAt;
public DateTime? CreatedAt
{
//get { return this.CreatedAt; } // Wrong!!!!!!!!! It will always be null!!
get { return this._createdAt; } //Correct!
set { _createdAt = (value == null ? DateTime.UtcNow : value); }
}
public DateTime? UpdatedAt { get; set; }
}
The exception happened not because the property CreatedAt was null, it doesn' t matter what was a value. The exception happened because CreatedAt called itself recursively non-stop and it caused a stack overflow
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.