CreateTableBuilder<TColumns>.UniqueConstraint Metoda

Definicja

Przestrzeń nazw:

Microsoft.EntityFrameworkCore.Migrations.Operations.Builders

Zestaw:

Microsoft.EntityFrameworkCore.Relational.dll

Pakiet:

Microsoft.EntityFrameworkCore.Relational v9.0.0

Źródło:

CreateTableBuilder.cs

Konfiguruje unikatowe ograniczenie w tabeli.

public virtual Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddUniqueConstraintOperation> UniqueConstraint (string name, System.Linq.Expressions.Expression<Func<TColumns,object>> columns);

abstract member UniqueConstraint : string * System.Linq.Expressions.Expression<Func<'Columns, obj>> -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddUniqueConstraintOperation>
override this.UniqueConstraint : string * System.Linq.Expressions.Expression<Func<'Columns, obj>> -> Microsoft.EntityFrameworkCore.Migrations.Operations.Builders.OperationBuilder<Microsoft.EntityFrameworkCore.Migrations.Operations.AddUniqueConstraintOperation>

Public Overridable Function UniqueConstraint (name As String, columns As Expression(Of Func(Of TColumns, Object))) As OperationBuilder(Of AddUniqueConstraintOperation)

Parametry

name

String

Nazwa ograniczenia.

columns

Expression<Func<TColumns,Object>>

Kolumny, które tworzą ograniczenie.

Zwraca

OperationBuilder<AddUniqueConstraintOperation>

Ten sam konstruktor, aby można było połączyć wiele wywołań.