public virtual void Apply(InternalEntityTypeBuilder entityTypeBuilder, ForeignKey foreignKey)
{
Check.NotNull(entityTypeBuilder, nameof(entityTypeBuilder));
Check.NotNull(foreignKey, nameof(foreignKey));
ConfigureKeyProperties(entityTypeBuilder, foreignKey.Properties);
}
public virtual void Apply(InternalEntityTypeBuilder entityTypeBuilder, ForeignKey foreignKey)
{
Check.NotNull(entityTypeBuilder, nameof(entityTypeBuilder));
Check.NotNull(foreignKey, nameof(foreignKey));
SetValueGeneration(entityTypeBuilder, foreignKey.Properties);
SetIdentity(entityTypeBuilder, foreignKey.Properties);
}
public virtual void Apply(InternalEntityTypeBuilder entityTypeBuilder, ForeignKey foreignKey)
{
var properties = foreignKey.Properties;
SetValueGeneration(entityTypeBuilder, properties);
var valueGeneratedOnAddProperty = FindValueGeneratedOnAddProperty(properties);
if (valueGeneratedOnAddProperty != null
&& entityTypeBuilder.Metadata.FindPrimaryKey(properties) != null)
{
SetIdentity(entityTypeBuilder, valueGeneratedOnAddProperty);
}
}
private bool ShouldFlip(
ForeignKey foreignKey,
IReadOnlyList<Property> currentDependentCandidateProperties,
IReadOnlyList<Property> currentPrincipalCandidateProperties)
{
if (currentDependentCandidateProperties != null
&& currentPrincipalCandidateProperties == null)
{
return false;
}
if (currentDependentCandidateProperties == null
&& currentPrincipalCandidateProperties != null)
{
return true;
}
var navigationToPrincipal = foreignKey.DependentToPrincipal;
var navigationToDependent = foreignKey.PrincipalToDependent;
if (navigationToPrincipal == null
&& navigationToDependent != null)
{
return false;
}
if (navigationToPrincipal != null
&& navigationToDependent == null)
{
return true;
}
var model = foreignKey.DeclaringEntityType.Model;
var principalPk = foreignKey.PrincipalEntityType.FindPrimaryKey();
var principalPkReferenceThreshold = foreignKey.PrincipalKey == principalPk ? 1 : 0;
var isPrincipalKeyReferenced = principalPk != null && model.FindReferencingForeignKeys(principalPk).Count() > principalPkReferenceThreshold;
var dependentPk = foreignKey.DeclaringEntityType.FindPrimaryKey();
var isDependentPrimaryKeyReferenced = dependentPk != null && model.FindReferencingForeignKeys(dependentPk).Any();
if (isPrincipalKeyReferenced
&& !isDependentPrimaryKeyReferenced)
{
return false;
}
if (!isPrincipalKeyReferenced
&& isDependentPrimaryKeyReferenced)
{
return true;
}
return StringComparer.Ordinal.Compare(foreignKey.PrincipalEntityType.Name, foreignKey.DeclaringEntityType.Name) > 0;
}
public void Can_create_foreign_key()
{
var entityType = new Model().AddEntityType("E");
var dependentProp = entityType.AddProperty("P", typeof(int));
var principalProp = entityType.AddProperty("Id", typeof(int));
entityType.GetOrSetPrimaryKey(principalProp);
var foreignKey
= new ForeignKey(new[] { dependentProp }, entityType.FindPrimaryKey(), entityType, entityType)
{
IsUnique = true
};
Assert.Same(entityType, foreignKey.PrincipalEntityType);
Assert.Same(principalProp, foreignKey.PrincipalKey.Properties.Single());
Assert.Same(dependentProp, foreignKey.Properties.Single());
Assert.True(foreignKey.IsUnique.Value);
Assert.Same(entityType.FindPrimaryKey(), foreignKey.PrincipalKey);
}
private bool RemoveForeignKey(ForeignKey foreignKey, ConfigurationSource configurationSource)
{
var entityBuilder = Entity(foreignKey.EntityType.Type, ConfigurationSource.Convention);
return(entityBuilder.RemoveForeignKey(foreignKey, configurationSource));
}
private IReadOnlyList<Property> TryFindMatchingClrProperties(ForeignKey foreignKey, string baseName, bool onDependent)
{
var entityType = onDependent
? foreignKey.EntityType
: foreignKey.PrincipalEntityType;
var propertiesToReference = onDependent
? foreignKey.PrincipalKey.Properties
: foreignKey.EntityType.FindPrimaryKey()?.Properties;
if (propertiesToReference == null)
{
return null;
}
var foreignKeyProperties = new List<Property>();
foreach (var referencedProperty in propertiesToReference)
{
var property = TryGetProperty(entityType, baseName
+ referencedProperty.Name, referencedProperty.ClrType.UnwrapNullableType());
if (property != null)
{
foreignKeyProperties.Add(property);
}
}
if (propertiesToReference.Count == 1
&& foreignKeyProperties.Count == 0)
{
var property = TryGetProperty(entityType, baseName + "Id", propertiesToReference.Single().ClrType.UnwrapNullableType());
if (property != null)
{
foreignKeyProperties.Add(property);
}
}
if (foreignKeyProperties.Count < propertiesToReference.Count)
{
return null;
}
if (foreignKey.IsRequired == false
&& foreignKeyProperties.All(p => !((IProperty)p).IsNullable))
{
return null;
}
var primaryKey = entityType.FindPrimaryKey();
if (primaryKey != null)
{
if (foreignKeyProperties.All(property => primaryKey.Properties.Contains(property)))
{
return null;
}
}
return foreignKeyProperties;
}
private IReadOnlyList<Property> GetCandidateForeignKeyProperties(ForeignKey foreignKey, bool onDependent)
{
var baseNames = new List<string>();
var navigation = onDependent
? foreignKey.DependentToPrincipal
: foreignKey.PrincipalToDependent;
if (navigation != null)
{
baseNames.Add(navigation.Name);
}
var entityTypeToReference = onDependent
? foreignKey.PrincipalEntityType
: foreignKey.EntityType;
baseNames.Add(entityTypeToReference.DisplayName());
baseNames.Add("");
foreach (var baseName in baseNames)
{
var match = TryFindMatchingClrProperties(foreignKey, baseName, onDependent);
if (match != null)
{
return match;
}
}
return null;
}
private IReadOnlyList<Property> FindMatchingNonShadowProperties(
ForeignKey foreignKey, string baseName, bool onDependent)
{
var dependentEntityType = onDependent
? foreignKey.DeclaringEntityType
: foreignKey.PrincipalEntityType;
var principalEntityType = onDependent
? foreignKey.PrincipalEntityType
: foreignKey.DeclaringEntityType;
var propertiesToReference = onDependent
? foreignKey.PrincipalKey.Properties
: foreignKey.DeclaringEntityType.FindPrimaryKey()?.Properties;
if (propertiesToReference == null)
{
return null;
}
var foreignKeyProperties = new List<Property>();
foreach (IProperty referencedProperty in propertiesToReference)
{
var property = TryGetProperty(dependentEntityType,
baseName + referencedProperty.Name,
referencedProperty.ClrType.UnwrapNullableType());
if (property != null)
{
foreignKeyProperties.Add(property);
}
}
if (propertiesToReference.Count == 1
&& foreignKeyProperties.Count == 0)
{
var property = TryGetProperty(dependentEntityType,
baseName + "Id",
((IProperty)propertiesToReference.Single()).ClrType.UnwrapNullableType());
if (property != null)
{
foreignKeyProperties.Add(property);
}
}
if (foreignKeyProperties.Count < propertiesToReference.Count)
{
return null;
}
if (!ForeignKey.AreCompatible(
propertiesToReference,
foreignKeyProperties,
principalEntityType,
dependentEntityType,
shouldThrow: false))
{
return null;
}
var primaryKey = dependentEntityType.FindPrimaryKey();
if (primaryKey != null)
{
if (foreignKeyProperties.All(property => primaryKey.Properties.Contains(property)))
{
return null;
}
}
return foreignKeyProperties;
}
public void Can_create_foreign_key_with_non_pk_principal()
{
var entityType = new Model().AddEntityType("E");
var keyProp = entityType.AddProperty("Id", typeof(int));
var dependentProp = entityType.AddProperty("P", typeof(int));
var principalProp = entityType.AddProperty("U", typeof(int));
entityType.GetOrSetPrimaryKey(keyProp);
var principalKey = entityType.AddKey(principalProp);
var foreignKey
= new ForeignKey(new[] { dependentProp }, principalKey, entityType, entityType)
{
IsUnique = false
};
Assert.Same(entityType, foreignKey.PrincipalEntityType);
Assert.Same(principalProp, foreignKey.PrincipalKey.Properties.Single());
Assert.Same(dependentProp, foreignKey.Properties.Single());
Assert.False(foreignKey.IsUnique.Value);
Assert.Same(principalKey, foreignKey.PrincipalKey);
}
public void Can_change_cascade_delete_flag()
{
var entityType = new Model().AddEntityType("E");
var keyProp = entityType.AddProperty("Id", typeof(int));
var dependentProp = entityType.AddProperty("P", typeof(int));
var principalProp = entityType.AddProperty("U", typeof(int));
entityType.GetOrSetPrimaryKey(keyProp);
var principalKey = entityType.AddKey(principalProp);
var foreignKey
= new ForeignKey(new[] { dependentProp }, principalKey, entityType, entityType);
Assert.Null(foreignKey.DeleteBehavior);
Assert.Equal(DeleteBehavior.Restrict, ((IForeignKey)foreignKey).DeleteBehavior);
foreignKey.DeleteBehavior = DeleteBehavior.Cascade;
Assert.Equal(DeleteBehavior.Cascade, foreignKey.DeleteBehavior);
Assert.Equal(DeleteBehavior.Cascade, ((IForeignKey)foreignKey).DeleteBehavior);
foreignKey.DeleteBehavior = DeleteBehavior.Restrict;
Assert.Equal(DeleteBehavior.Restrict, foreignKey.DeleteBehavior);
Assert.Equal(DeleteBehavior.Restrict, ((IForeignKey)foreignKey).DeleteBehavior);
foreignKey.DeleteBehavior = null;
Assert.Null(foreignKey.DeleteBehavior);
Assert.Equal(DeleteBehavior.Restrict, ((IForeignKey)foreignKey).DeleteBehavior);
}
public void Setting_IsRequired_to_false_will_set_all_FK_properties_as_nullable()
{
var entityType = new Model().AddEntityType("E");
var property = entityType.AddProperty("Id1", typeof(int));
var property1 = entityType.AddProperty("Id2", typeof(string));
entityType.GetOrSetPrimaryKey(new[]
{
property,
property1
});
var dependentProp1 = entityType.AddProperty("P1", typeof(int?));
var dependentProp2 = entityType.AddProperty("P2", typeof(string));
var foreignKey = new ForeignKey(new[] { dependentProp1, dependentProp2 }, entityType.FindPrimaryKey(), entityType, entityType) { IsRequired = false };
Assert.False(foreignKey.IsRequired.Value);
Assert.True(dependentProp1.IsNullable.Value);
Assert.True(dependentProp2.IsNullable.Value);
}
public void IsRequired_false_when_any_part_of_composite_FK_is_nullable()
{
var entityType = new Model().AddEntityType("E");
var property = entityType.AddProperty("Id1", typeof(int));
var property1 = entityType.AddProperty("Id2", typeof(string));
entityType.GetOrSetPrimaryKey(new[]
{
property,
property1
});
var dependentProp1 = entityType.AddProperty("P1", typeof(int));
var dependentProp2 = entityType.AddProperty("P2", typeof(string));
dependentProp2.IsNullable = true;
var foreignKey = new ForeignKey(new[] { dependentProp1, dependentProp2 }, entityType.FindPrimaryKey(), entityType, entityType);
Assert.False(foreignKey.IsRequired);
Assert.False(((IForeignKey)foreignKey).IsRequired);
dependentProp2.IsNullable = false;
Assert.True(foreignKey.IsRequired);
Assert.True(((IForeignKey)foreignKey).IsRequired);
}
public void IsRequired_false_for_composite_FK_by_default()
{
var entityType = new Model().AddEntityType("E");
var property = entityType.AddProperty("Id1", typeof(int));
var property1 = entityType.AddProperty("Id2", typeof(string));
entityType.GetOrSetPrimaryKey(new[]
{
property,
property1
});
var dependentProp1 = entityType.AddProperty("P1", typeof(int));
var dependentProp2 = entityType.AddProperty("P2", typeof(string));
var foreignKey = new ForeignKey(new[] { dependentProp1, dependentProp2 }, entityType.FindPrimaryKey(), entityType, entityType);
Assert.Null(foreignKey.IsRequired);
Assert.False(((IForeignKey)foreignKey).IsRequired);
}
public void IsRequired_and_IsUnique_null_when_dependent_property_nullable_by_default()
{
var entityType = new Model().AddEntityType("E");
var property = entityType.AddProperty("Id", typeof(int));
entityType.GetOrSetPrimaryKey(property);
var dependentProp = entityType.AddProperty("P", typeof(int?));
var foreignKey = new ForeignKey(new[] { dependentProp }, entityType.FindPrimaryKey(), entityType, entityType);
Assert.Null(foreignKey.IsRequired);
Assert.False(((IForeignKey)foreignKey).IsRequired);
Assert.Null(foreignKey.IsUnique);
Assert.False(((IForeignKey)foreignKey).IsUnique);
}
public void IsRequired_true_when_dependent_property_not_nullable()
{
var entityType = new Model().AddEntityType("E");
var property = entityType.AddProperty("Id", typeof(int));
entityType.GetOrSetPrimaryKey(property);
var dependentProp = entityType.AddProperty("P", typeof(int));
dependentProp.IsNullable = false;
var foreignKey = new ForeignKey(new[] { dependentProp }, entityType.FindPrimaryKey(), entityType, entityType);
Assert.True(foreignKey.IsRequired);
Assert.True(((IForeignKey)foreignKey).IsRequired);
}
