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IConventionForeignKeyBuilder.IsUnique Method

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Definition

Namespace:
Microsoft.EntityFrameworkCore.Metadata.Builders
Assembly:
Microsoft.EntityFrameworkCore.dll
Package:
Microsoft.EntityFrameworkCore v5.0.0
Package:
Microsoft.EntityFrameworkCore v6.0.0
Package:
Microsoft.EntityFrameworkCore v7.0.0
Package:
Microsoft.EntityFrameworkCore v8.0.0
Package:
Microsoft.EntityFrameworkCore v9.0.0
Source:
IConventionForeignKeyBuilder.cs
Source:
IConventionForeignKeyBuilder.cs
Source:
IConventionForeignKeyBuilder.cs

Configures whether the dependent entity is unique (i.e. whether the navigation to the dependent entity type is not a collection).

public Microsoft.EntityFrameworkCore.Metadata.Builders.IConventionForeignKeyBuilder IsUnique (bool? unique, bool fromDataAnnotation = false);
public Microsoft.EntityFrameworkCore.Metadata.Builders.IConventionForeignKeyBuilder? IsUnique (bool? unique, bool fromDataAnnotation = false);
abstract member IsUnique : Nullable<bool> * bool -> Microsoft.EntityFrameworkCore.Metadata.Builders.IConventionForeignKeyBuilder
Public Function IsUnique (unique As Nullable(Of Boolean), Optional fromDataAnnotation As Boolean = false) As IConventionForeignKeyBuilder

Parameters

unique
Nullable<Boolean>

A value indicating whether the dependent entity is unique. null to reset to default.

fromDataAnnotation
Boolean

Indicates whether the configuration was specified using a data annotation.

Returns

IConventionForeignKeyBuilder

The same builder instance if the uniqueness was configured, null otherwise.

Applies to