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arsar-2618 asked arsar-2618 commented

correct entity relationship


 public class FirmsModel
         [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
         public int FirmId { get; set; }
         public string Name { get; set; }
         public virtual FirmServiceRegistraionModel firmserviceregistration_ { get; set; }
 public class ServicesModel
         [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
         public int ServiceId { get; set; }
         public string ServiceName { get; set; }
         public virtual ICollection<FirmServiceRegistraionModel> FirmServiceRegistraion_ { get; set; }
 public class FirmServiceRegistraionModel
         [Key, DatabaseGenerated(DatabaseGeneratedOption.Identity)]
         public int FirmServiceRegistrationId { get; set; }
         public string FirmServiceRegistrationNumber { get; set; }
         public int FirmId { get; set; }
         public virtual ICollection<FirmsModel> firms_ { get; set; }
         public int ServiceId { get; set; }
         public virtual ServicesModel services { get; set; }

Every firm will be assigned a unique service in the FirmServiceRegistraion. There will be no repetition of FirmId in this table.

But one service can be assigned to multiple Firms in the FirmServiceRegistraion.

I have designed the navigational property for this, but I am confused whether it is the correct way or not. Please suggest. Thank You!!!

Attached figure shows the data in the tables.


firmservice.png (11.7 KiB)
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Hi @arsar-2618 ,
From your models,I think your relationship are this:
Firms<-> FireServiceRegistraion<-> Service
The Firms to FireServiceRegistraion's relationship is many to one . And Service to FireServiceRegistraion's relationship is one to many. Do you need this?
I don't understand your sample.
Best regards,
Yijing Sun

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@ YijingSun-MSFT Hello, Sorry I don't have any other options to clear this problem. I am unable to post questions on this site, ever time I try to post any questions shows, Access Denied
You don't have permission to access "" on this server.
Reference #18.c4f02817.1636619045.19977195
Why is it so, please help.

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