Multiplicity is not valid in Role 'CW_FirmaCommunication_CwFirma_Source' in relationship 'CW_FirmaCommunication_CwFirma'
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I have the following problem:
I have a company (CW_Firma) which can have 0 to many ways to contact them (CW_FirmaCommunication).
I am using EntityFramework and FluentAPI to create the relationship.
I have the following code :
[Table("dbo.CW_Firma")]
public class CW_Firma
[Key]
[Column("F_VAT")]
public int VatNumber get; set;
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("FC_VAT")]
public int VatNumber get; set;
[Column("FC_Data")]
public string FC_Data get; set;
protected override void OnModelCreating(DbModelBuilder modelBuilder)
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired(c => c.CwFirma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
When I run my code, I get the following exception :
Multiplicity is not valid in Role 'CW_FirmaCommunication_CwFirma_Source' in relationship 'CW_FirmaCommunication_CwFirma'. Because the Dependent Role refers to the key properties, the upper bound of the multiplicity of the Dependent Role must be '1'
I have been searching the internet, looking at different solutions here on StackOverflow, but nothing seems to resolve my problem.
Can anyone tell me where I'm going wrong?
c# entity-framework-6 one-to-many ef-fluent-api
add a comment |
I have the following problem:
I have a company (CW_Firma) which can have 0 to many ways to contact them (CW_FirmaCommunication).
I am using EntityFramework and FluentAPI to create the relationship.
I have the following code :
[Table("dbo.CW_Firma")]
public class CW_Firma
[Key]
[Column("F_VAT")]
public int VatNumber get; set;
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("FC_VAT")]
public int VatNumber get; set;
[Column("FC_Data")]
public string FC_Data get; set;
protected override void OnModelCreating(DbModelBuilder modelBuilder)
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired(c => c.CwFirma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
When I run my code, I get the following exception :
Multiplicity is not valid in Role 'CW_FirmaCommunication_CwFirma_Source' in relationship 'CW_FirmaCommunication_CwFirma'. Because the Dependent Role refers to the key properties, the upper bound of the multiplicity of the Dependent Role must be '1'
I have been searching the internet, looking at different solutions here on StackOverflow, but nothing seems to resolve my problem.
Can anyone tell me where I'm going wrong?
c# entity-framework-6 one-to-many ef-fluent-api
add a comment |
I have the following problem:
I have a company (CW_Firma) which can have 0 to many ways to contact them (CW_FirmaCommunication).
I am using EntityFramework and FluentAPI to create the relationship.
I have the following code :
[Table("dbo.CW_Firma")]
public class CW_Firma
[Key]
[Column("F_VAT")]
public int VatNumber get; set;
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("FC_VAT")]
public int VatNumber get; set;
[Column("FC_Data")]
public string FC_Data get; set;
protected override void OnModelCreating(DbModelBuilder modelBuilder)
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired(c => c.CwFirma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
When I run my code, I get the following exception :
Multiplicity is not valid in Role 'CW_FirmaCommunication_CwFirma_Source' in relationship 'CW_FirmaCommunication_CwFirma'. Because the Dependent Role refers to the key properties, the upper bound of the multiplicity of the Dependent Role must be '1'
I have been searching the internet, looking at different solutions here on StackOverflow, but nothing seems to resolve my problem.
Can anyone tell me where I'm going wrong?
c# entity-framework-6 one-to-many ef-fluent-api
I have the following problem:
I have a company (CW_Firma) which can have 0 to many ways to contact them (CW_FirmaCommunication).
I am using EntityFramework and FluentAPI to create the relationship.
I have the following code :
[Table("dbo.CW_Firma")]
public class CW_Firma
[Key]
[Column("F_VAT")]
public int VatNumber get; set;
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("FC_VAT")]
public int VatNumber get; set;
[Column("FC_Data")]
public string FC_Data get; set;
protected override void OnModelCreating(DbModelBuilder modelBuilder)
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired(c => c.CwFirma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
When I run my code, I get the following exception :
Multiplicity is not valid in Role 'CW_FirmaCommunication_CwFirma_Source' in relationship 'CW_FirmaCommunication_CwFirma'. Because the Dependent Role refers to the key properties, the upper bound of the multiplicity of the Dependent Role must be '1'
I have been searching the internet, looking at different solutions here on StackOverflow, but nothing seems to resolve my problem.
Can anyone tell me where I'm going wrong?
c# entity-framework-6 one-to-many ef-fluent-api
c# entity-framework-6 one-to-many ef-fluent-api
asked Nov 16 '18 at 14:39
Bart SchelkensBart Schelkens
41831029
41831029
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
- you use fluent api and mapping annotations - I would prefer to use only one,
- in annotation mapping you declared that field VatNumber of CW_FirmaCommunication table is primary key (as VatNumber in CW_Firma), which means that you have relation 1:1 while using fluent api you want 1:many.
Basing on your code I made few corrects:
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("Communnication_Id")]
public int CommunicationId get; set;
[Column("FC_VAT")]
public int VatNumber get; set;
public CW_Firma Firma get; set;
[Column("FC_Data")]
public string FC_Data get; set;
I have added seperate PK for communications table (not FC_VAT), and added navigation property Firma.
New mapping:
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired<CW_Firma>(c => c.Firma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
It's working in my test db.
Thanks for your remarks, but how can I make it so my problem is solved? I tried removing the "Key" from CW_FirmaCommunication" but I still get the same error.
– Bart Schelkens
Nov 19 '18 at 7:07
I've changed my code to what you wrote, but now I'm getting : A relationship multiplicity constraint violation occurred: An EntityReference can have no more than one related object, but the query returned more than one related object. This is a non-recoverable error.
– Bart Schelkens
Nov 19 '18 at 14:31
@BartSchelkens do you mean you have created tables in db and that new error is during quering data? In my tests tables had created. Maybe clear both tables and create them from start.
– Grzesiek Danowski
Nov 19 '18 at 15:04
I'm using an existing database. So I didn't create the tables, they were already there.
– Bart Schelkens
Nov 19 '18 at 15:07
Is FC_VAT unique in CW_Firma table?
– Grzesiek Danowski
Nov 19 '18 at 15:10
|
show 3 more comments
After a lot of searching and trying, this is what I ended up with and what works fine:
public class CW_FirmaCommunication
[Key]
public int FC_ID get; set;
public int FC_VAT get; set;
public int FC_Type get; set;
public string FC_Data get; set;
[ForeignKey("FC_VAT")]
public virtual CW_Firma CwFirma get; set;
public class CW_Firma
[Key]
public int F_VAT get; set;
And I removed the code from the "OnModelCreating".
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
- you use fluent api and mapping annotations - I would prefer to use only one,
- in annotation mapping you declared that field VatNumber of CW_FirmaCommunication table is primary key (as VatNumber in CW_Firma), which means that you have relation 1:1 while using fluent api you want 1:many.
Basing on your code I made few corrects:
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("Communnication_Id")]
public int CommunicationId get; set;
[Column("FC_VAT")]
public int VatNumber get; set;
public CW_Firma Firma get; set;
[Column("FC_Data")]
public string FC_Data get; set;
I have added seperate PK for communications table (not FC_VAT), and added navigation property Firma.
New mapping:
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired<CW_Firma>(c => c.Firma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
It's working in my test db.
Thanks for your remarks, but how can I make it so my problem is solved? I tried removing the "Key" from CW_FirmaCommunication" but I still get the same error.
– Bart Schelkens
Nov 19 '18 at 7:07
I've changed my code to what you wrote, but now I'm getting : A relationship multiplicity constraint violation occurred: An EntityReference can have no more than one related object, but the query returned more than one related object. This is a non-recoverable error.
– Bart Schelkens
Nov 19 '18 at 14:31
@BartSchelkens do you mean you have created tables in db and that new error is during quering data? In my tests tables had created. Maybe clear both tables and create them from start.
– Grzesiek Danowski
Nov 19 '18 at 15:04
I'm using an existing database. So I didn't create the tables, they were already there.
– Bart Schelkens
Nov 19 '18 at 15:07
Is FC_VAT unique in CW_Firma table?
– Grzesiek Danowski
Nov 19 '18 at 15:10
|
show 3 more comments
- you use fluent api and mapping annotations - I would prefer to use only one,
- in annotation mapping you declared that field VatNumber of CW_FirmaCommunication table is primary key (as VatNumber in CW_Firma), which means that you have relation 1:1 while using fluent api you want 1:many.
Basing on your code I made few corrects:
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("Communnication_Id")]
public int CommunicationId get; set;
[Column("FC_VAT")]
public int VatNumber get; set;
public CW_Firma Firma get; set;
[Column("FC_Data")]
public string FC_Data get; set;
I have added seperate PK for communications table (not FC_VAT), and added navigation property Firma.
New mapping:
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired<CW_Firma>(c => c.Firma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
It's working in my test db.
Thanks for your remarks, but how can I make it so my problem is solved? I tried removing the "Key" from CW_FirmaCommunication" but I still get the same error.
– Bart Schelkens
Nov 19 '18 at 7:07
I've changed my code to what you wrote, but now I'm getting : A relationship multiplicity constraint violation occurred: An EntityReference can have no more than one related object, but the query returned more than one related object. This is a non-recoverable error.
– Bart Schelkens
Nov 19 '18 at 14:31
@BartSchelkens do you mean you have created tables in db and that new error is during quering data? In my tests tables had created. Maybe clear both tables and create them from start.
– Grzesiek Danowski
Nov 19 '18 at 15:04
I'm using an existing database. So I didn't create the tables, they were already there.
– Bart Schelkens
Nov 19 '18 at 15:07
Is FC_VAT unique in CW_Firma table?
– Grzesiek Danowski
Nov 19 '18 at 15:10
|
show 3 more comments
- you use fluent api and mapping annotations - I would prefer to use only one,
- in annotation mapping you declared that field VatNumber of CW_FirmaCommunication table is primary key (as VatNumber in CW_Firma), which means that you have relation 1:1 while using fluent api you want 1:many.
Basing on your code I made few corrects:
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("Communnication_Id")]
public int CommunicationId get; set;
[Column("FC_VAT")]
public int VatNumber get; set;
public CW_Firma Firma get; set;
[Column("FC_Data")]
public string FC_Data get; set;
I have added seperate PK for communications table (not FC_VAT), and added navigation property Firma.
New mapping:
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired<CW_Firma>(c => c.Firma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
It's working in my test db.
- you use fluent api and mapping annotations - I would prefer to use only one,
- in annotation mapping you declared that field VatNumber of CW_FirmaCommunication table is primary key (as VatNumber in CW_Firma), which means that you have relation 1:1 while using fluent api you want 1:many.
Basing on your code I made few corrects:
[Table("dbo.CW_FirmaCommunication")]
public class CW_FirmaCommunication
[Key]
[Column("Communnication_Id")]
public int CommunicationId get; set;
[Column("FC_VAT")]
public int VatNumber get; set;
public CW_Firma Firma get; set;
[Column("FC_Data")]
public string FC_Data get; set;
I have added seperate PK for communications table (not FC_VAT), and added navigation property Firma.
New mapping:
modelBuilder.Entity<CW_FirmaCommunication>()
.HasRequired<CW_Firma>(c => c.Firma)
.WithMany()
.HasForeignKey(f => f.VatNumber);
It's working in my test db.
edited Nov 19 '18 at 10:36
answered Nov 16 '18 at 16:34
Grzesiek DanowskiGrzesiek Danowski
21217
21217
Thanks for your remarks, but how can I make it so my problem is solved? I tried removing the "Key" from CW_FirmaCommunication" but I still get the same error.
– Bart Schelkens
Nov 19 '18 at 7:07
I've changed my code to what you wrote, but now I'm getting : A relationship multiplicity constraint violation occurred: An EntityReference can have no more than one related object, but the query returned more than one related object. This is a non-recoverable error.
– Bart Schelkens
Nov 19 '18 at 14:31
@BartSchelkens do you mean you have created tables in db and that new error is during quering data? In my tests tables had created. Maybe clear both tables and create them from start.
– Grzesiek Danowski
Nov 19 '18 at 15:04
I'm using an existing database. So I didn't create the tables, they were already there.
– Bart Schelkens
Nov 19 '18 at 15:07
Is FC_VAT unique in CW_Firma table?
– Grzesiek Danowski
Nov 19 '18 at 15:10
|
show 3 more comments
Thanks for your remarks, but how can I make it so my problem is solved? I tried removing the "Key" from CW_FirmaCommunication" but I still get the same error.
– Bart Schelkens
Nov 19 '18 at 7:07
I've changed my code to what you wrote, but now I'm getting : A relationship multiplicity constraint violation occurred: An EntityReference can have no more than one related object, but the query returned more than one related object. This is a non-recoverable error.
– Bart Schelkens
Nov 19 '18 at 14:31
@BartSchelkens do you mean you have created tables in db and that new error is during quering data? In my tests tables had created. Maybe clear both tables and create them from start.
– Grzesiek Danowski
Nov 19 '18 at 15:04
I'm using an existing database. So I didn't create the tables, they were already there.
– Bart Schelkens
Nov 19 '18 at 15:07
Is FC_VAT unique in CW_Firma table?
– Grzesiek Danowski
Nov 19 '18 at 15:10
Thanks for your remarks, but how can I make it so my problem is solved? I tried removing the "Key" from CW_FirmaCommunication" but I still get the same error.
– Bart Schelkens
Nov 19 '18 at 7:07
Thanks for your remarks, but how can I make it so my problem is solved? I tried removing the "Key" from CW_FirmaCommunication" but I still get the same error.
– Bart Schelkens
Nov 19 '18 at 7:07
I've changed my code to what you wrote, but now I'm getting : A relationship multiplicity constraint violation occurred: An EntityReference can have no more than one related object, but the query returned more than one related object. This is a non-recoverable error.
– Bart Schelkens
Nov 19 '18 at 14:31
I've changed my code to what you wrote, but now I'm getting : A relationship multiplicity constraint violation occurred: An EntityReference can have no more than one related object, but the query returned more than one related object. This is a non-recoverable error.
– Bart Schelkens
Nov 19 '18 at 14:31
@BartSchelkens do you mean you have created tables in db and that new error is during quering data? In my tests tables had created. Maybe clear both tables and create them from start.
– Grzesiek Danowski
Nov 19 '18 at 15:04
@BartSchelkens do you mean you have created tables in db and that new error is during quering data? In my tests tables had created. Maybe clear both tables and create them from start.
– Grzesiek Danowski
Nov 19 '18 at 15:04
I'm using an existing database. So I didn't create the tables, they were already there.
– Bart Schelkens
Nov 19 '18 at 15:07
I'm using an existing database. So I didn't create the tables, they were already there.
– Bart Schelkens
Nov 19 '18 at 15:07
Is FC_VAT unique in CW_Firma table?
– Grzesiek Danowski
Nov 19 '18 at 15:10
Is FC_VAT unique in CW_Firma table?
– Grzesiek Danowski
Nov 19 '18 at 15:10
|
show 3 more comments
After a lot of searching and trying, this is what I ended up with and what works fine:
public class CW_FirmaCommunication
[Key]
public int FC_ID get; set;
public int FC_VAT get; set;
public int FC_Type get; set;
public string FC_Data get; set;
[ForeignKey("FC_VAT")]
public virtual CW_Firma CwFirma get; set;
public class CW_Firma
[Key]
public int F_VAT get; set;
And I removed the code from the "OnModelCreating".
add a comment |
After a lot of searching and trying, this is what I ended up with and what works fine:
public class CW_FirmaCommunication
[Key]
public int FC_ID get; set;
public int FC_VAT get; set;
public int FC_Type get; set;
public string FC_Data get; set;
[ForeignKey("FC_VAT")]
public virtual CW_Firma CwFirma get; set;
public class CW_Firma
[Key]
public int F_VAT get; set;
And I removed the code from the "OnModelCreating".
add a comment |
After a lot of searching and trying, this is what I ended up with and what works fine:
public class CW_FirmaCommunication
[Key]
public int FC_ID get; set;
public int FC_VAT get; set;
public int FC_Type get; set;
public string FC_Data get; set;
[ForeignKey("FC_VAT")]
public virtual CW_Firma CwFirma get; set;
public class CW_Firma
[Key]
public int F_VAT get; set;
And I removed the code from the "OnModelCreating".
After a lot of searching and trying, this is what I ended up with and what works fine:
public class CW_FirmaCommunication
[Key]
public int FC_ID get; set;
public int FC_VAT get; set;
public int FC_Type get; set;
public string FC_Data get; set;
[ForeignKey("FC_VAT")]
public virtual CW_Firma CwFirma get; set;
public class CW_Firma
[Key]
public int F_VAT get; set;
And I removed the code from the "OnModelCreating".
answered Nov 20 '18 at 10:05
Bart SchelkensBart Schelkens
41831029
41831029
add a comment |
add a comment |
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