EntityTypeConfiguration<TEntityType>.HasOptional<TTargetEntity> Method

Definition

Namespace:

System.Data.Entity.ModelConfiguration

Assembly:

EntityFramework.dll

Configures an optional relationship from this entity type. Instances of the entity type will be able to be saved to the database without this relationship being specified. The foreign key in the database will be nullable.

[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1011:ConsiderPassingBaseTypesAsParameters")]
[System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Design", "CA1006:DoNotNestGenericTypesInMemberSignatures")]
public System.Data.Entity.ModelConfiguration.Configuration.OptionalNavigationPropertyConfiguration<TEntityType,TTargetEntity> HasOptional<TTargetEntity> (System.Linq.Expressions.Expression<Func<TEntityType,TTargetEntity>> navigationPropertyExpression) where TTargetEntity : class;

member this.HasOptional : System.Linq.Expressions.Expression<Func<'EntityType, 'argetEntity>> -> System.Data.Entity.ModelConfiguration.Configuration.OptionalNavigationPropertyConfiguration<'EntityType, 'argetEntity (requires 'EntityType : null and 'argetEntity : null)> (requires 'argetEntity : null)

Public Function HasOptional(Of TTargetEntity As Class) (navigationPropertyExpression As Expression(Of Func(Of TEntityType, TTargetEntity))) As OptionalNavigationPropertyConfiguration(Of TEntityType, TTargetEntity)

Type Parameters

TTargetEntity

The type of the entity at the other end of the relationship.

Parameters

navigationPropertyExpression

Expression<Func<TEntityType,TTargetEntity>>

A lambda expression representing the navigation property for the relationship. C#: t => t.MyProperty VB.Net: Function(t) t.MyProperty

Returns

OptionalNavigationPropertyConfiguration<TEntityType,TTargetEntity>

A configuration object that can be used to further configure the relationship.

Attributes

SuppressMessageAttribute