public virtual void AddNavigationBinding(INavigation navigation, EntityShaperExpression entityShaper)
{
if (!EntityType.IsAssignableFrom(navigation.DeclaringEntityType) &&
!navigation.DeclaringEntityType.IsAssignableFrom(EntityType))
{
throw new InvalidOperationException(
$"Called EntityProjectionExpression.AddNavigationBinding() with incorrect INavigation. " +
$"EntityType:{EntityType.DisplayName()}, Property:{navigation.Name}");
}
_navigationExpressionsCache[navigation] = entityShaper;
}
/// <summary>
/// Adds a navigation binding for this entity projection when the target entity type of the navigation is owned or weak.
/// </summary>
/// <param name="navigation"> A navigation to add binding for. </param>
/// <param name="entityShaper"> An entity shaper expression for the target type. </param>
public virtual void AddNavigationBinding([NotNull] INavigation navigation, [NotNull] EntityShaperExpression entityShaper)
{
Check.NotNull(navigation, nameof(navigation));
Check.NotNull(entityShaper, nameof(entityShaper));
if (!EntityType.IsAssignableFrom(navigation.DeclaringEntityType) &&
!navigation.DeclaringEntityType.IsAssignableFrom(EntityType))
{
throw new InvalidOperationException(
RelationalStrings.UnableToBindMemberToEntityProjection("Navigation", navigation.Name, EntityType.DisplayName()));
}
_ownedNavigationMap[navigation] = entityShaper;
}
public virtual void AddNavigationBinding([NotNull] INavigation navigation, [NotNull] EntityShaperExpression entityShaper)
{
Check.NotNull(navigation, nameof(navigation));
Check.NotNull(entityShaper, nameof(entityShaper));
if (!EntityType.IsAssignableFrom(navigation.DeclaringEntityType) &&
!navigation.DeclaringEntityType.IsAssignableFrom(EntityType))
{
throw new InvalidOperationException(
CoreStrings.EntityProjectionExpressionCalledWithIncorrectInterface(
"AddNavigationBinding",
"INavigation",
EntityType.DisplayName(),
navigation.Name));
}
_navigationExpressionsCache[navigation] = entityShaper;
}
private Expression Expand(Expression source, MemberIdentity member)
{
Type convertedType = null;
if (source is UnaryExpression unaryExpression &&
unaryExpression.NodeType == ExpressionType.Convert)
{
source = unaryExpression.Operand;
if (unaryExpression.Type != typeof(object))
{
convertedType = unaryExpression.Type;
}
}
if (source is EntityShaperExpression entityShaperExpression)
{
var entityType = entityShaperExpression.EntityType;
if (convertedType != null)
{
entityType = entityType.RootType().GetDerivedTypesInclusive()
.FirstOrDefault(et => et.ClrType == convertedType);
if (entityType == null)
{
return(null);
}
}
var navigation = member.MemberInfo != null
? entityType.FindNavigation(member.MemberInfo)
: entityType.FindNavigation(member.Name);
if (navigation != null &&
navigation.ForeignKey.IsOwnership)
{
if (navigation.IsCollection())
{
return(CreateShapedQueryExpression(
navigation.GetTargetType(),
_sqlExpressionFactory.Select(navigation.GetTargetType())));
}
var entityProjectionExpression = (EntityProjectionExpression)
(entityShaperExpression.ValueBufferExpression is ProjectionBindingExpression projectionBindingExpression
? _selectExpression.GetMappedProjection(projectionBindingExpression.ProjectionMember)
: entityShaperExpression.ValueBufferExpression);
var innerShaper = entityProjectionExpression.BindNavigation(navigation);
if (innerShaper == null)
{
var targetEntityType = navigation.GetTargetType();
var innerSelectExpression = _sqlExpressionFactory.Select(targetEntityType);
var innerShapedQuery = CreateShapedQueryExpression(targetEntityType, innerSelectExpression);
var makeNullable = navigation.ForeignKey.PrincipalKey.Properties
.Concat(navigation.ForeignKey.Properties)
.Select(p => p.ClrType)
.Any(t => t.IsNullableType());
var outerKey = CreateKeyAccessExpression(
entityShaperExpression, navigation.ForeignKey.PrincipalKey.Properties, makeNullable);
var innerKey = CreateKeyAccessExpression(
innerShapedQuery.ShaperExpression, navigation.ForeignKey.Properties, makeNullable);
var joinPredicate = _sqlTranslator.Translate(Expression.Equal(outerKey, innerKey));
_selectExpression.AddLeftJoin(innerSelectExpression, joinPredicate, null);
var leftJoinTable = ((LeftJoinExpression)_selectExpression.Tables.Last()).Table;
innerShaper = new EntityShaperExpression(targetEntityType,
new EntityProjectionExpression(targetEntityType, leftJoinTable, true),
true);
entityProjectionExpression.AddNavigationBinding(navigation, innerShaper);
}
return(innerShaper);
}
}
return(null);
}
