Interface INavigationExpansionExtensibilityHelper

Namespace

Microsoft.EntityFrameworkCore.Query

Assembly

Microsoft.EntityFrameworkCore.dll

Service which helps with various aspects of navigation expansion extensibility.

public interface INavigationExpansionExtensibilityHelper

Remarks

The service lifetime is Singleton. This means a single instance is used by many DbContext instances. The implementation must be thread-safe. This service cannot depend on services registered as Scoped.

See Implementation of database providers and extensions and How EF Core queries work for more information and examples.

Methods

AreQueryRootsCompatible(EntityQueryRootExpression?, EntityQueryRootExpression?)

Checks whether two query roots are compatible for a set operation to combine them.

bool AreQueryRootsCompatible(EntityQueryRootExpression? first, EntityQueryRootExpression? second)

Parameters

first EntityQueryRootExpression

The first query root.

second EntityQueryRootExpression

The second query root.

Returns

bool

CreateQueryRoot(IEntityType, EntityQueryRootExpression?)

Creates a new EntityQueryRootExpression.

EntityQueryRootExpression CreateQueryRoot(IEntityType entityType, EntityQueryRootExpression? source)

Parameters

entityType IEntityType

Entity type of the new EntityQueryRootExpression.

source EntityQueryRootExpression

Source expression.

Returns

EntityQueryRootExpression

ValidateQueryRootCreation(IEntityType, EntityQueryRootExpression?)

Validates whether a new EntityQueryRootExpression can be created.

void ValidateQueryRootCreation(IEntityType entityType, EntityQueryRootExpression? source)

Parameters

entityType IEntityType

Entity type of the new EntityQueryRootExpression.

source EntityQueryRootExpression

Source expression.