private static void SetForeignKeyProperties(
InternalEntityEntry dependentEntry,
InternalEntityEntry principalEntry,
IForeignKey foreignKey,
bool setModified,
bool fromQuery)
{
var principalProperties = foreignKey.PrincipalKey.Properties;
var dependentProperties = foreignKey.Properties;
for (var i = 0; i < foreignKey.Properties.Count; i++)
{
var principalProperty = principalProperties[i];
var dependentProperty = dependentProperties[i];
var principalValue = principalEntry[principalProperty];
var dependentValue = dependentEntry[dependentProperty];
if (!PrincipalValueEqualsDependentValue(principalProperty, dependentValue, principalValue) ||
(dependentEntry.IsConceptualNull(dependentProperty) &&
principalValue != null))
{
if (principalEntry.HasTemporaryValue(principalProperty))
{
dependentEntry.SetTemporaryValue(dependentProperty, principalValue, setModified);
}
else
{
dependentEntry.SetProperty(dependentProperty, principalValue, fromQuery, setModified);
}
dependentEntry.StateManager.UpdateDependentMap(dependentEntry, foreignKey);
dependentEntry.SetRelationshipSnapshotValue(dependentProperty, principalValue);
}
}
}
private static void SetForeignKeyProperties(
InternalEntityEntry dependentEntry,
InternalEntityEntry principalEntry,
IForeignKey foreignKey,
bool setModified)
{
var principalProperties = foreignKey.PrincipalKey.Properties;
var dependentProperties = foreignKey.Properties;
for (var i = 0; i < foreignKey.Properties.Count; i++)
{
var principalValue = principalEntry[principalProperties[i]];
var dependentProperty = dependentProperties[i];
if (!StructuralComparisons.StructuralEqualityComparer.Equals(
dependentEntry[dependentProperty],
principalValue) ||
(dependentEntry.IsConceptualNull(dependentProperty) &&
principalValue != null))
{
dependentEntry.SetProperty(dependentProperty, principalValue, setModified);
dependentEntry.StateManager.UpdateDependentMap(dependentEntry, foreignKey);
dependentEntry.SetRelationshipSnapshotValue(dependentProperty, principalValue);
}
}
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public virtual void DetectChanges(InternalEntityEntry entry)
{
var entityType = entry.EntityType;
foreach (var property in entityType.GetProperties())
{
if (property.GetOriginalValueIndex() >= 0 &&
!entry.IsConceptualNull(property) &&
!Equals(entry[property], entry.GetOriginalValue(property)))
{
entry.SetPropertyModified(property);
}
}
foreach (var property in entityType.GetProperties())
{
DetectKeyChange(entry, property);
}
if (entry.HasRelationshipSnapshot)
{
foreach (var navigation in entityType.GetNavigations())
{
DetectNavigationChange(entry, navigation);
}
}
}
private void LocalDetectChanges(InternalEntityEntry entry)
{
var entityType = entry.EntityType;
foreach (var property in entityType.GetProperties())
{
if (property.GetOriginalValueIndex() >= 0 &&
!entry.IsModified(property) &&
!entry.IsConceptualNull(property))
{
var current = entry[property];
var original = entry.GetOriginalValue(property);
var comparer = property.GetValueComparer();
if (comparer == null)
{
if (!Equals(current, original))
{
SetPropertyModified();
}
}
else if (!comparer.Equals(current, original))
{
SetPropertyModified();
}
void SetPropertyModified()
{
if (entry.EntityState == EntityState.Deleted)
{
ThrowIfKeyChanged(entry, property);
}
else
{
LogChangeDetected(entry, property, original, current);
entry.SetPropertyModified(property);
}
}
}
}
foreach (var property in entityType.GetProperties())
{
DetectKeyChange(entry, property);
}
if (entry.HasRelationshipSnapshot)
{
foreach (var navigation in entityType.GetNavigations())
{
DetectNavigationChange(entry, navigation);
}
foreach (var navigation in entityType.GetSkipNavigations())
{
DetectNavigationChange(entry, navigation);
}
}
}
private void LocalDetectChanges(InternalEntityEntry entry)
{
var entityType = entry.EntityType;
if (entry.EntityType.GetChangeTrackingStrategy() != ChangeTrackingStrategy.Snapshot)
{
return;
}
foreach (var property in entityType.GetProperties())
{
if (property.GetOriginalValueIndex() >= 0 &&
!entry.IsModified(property) &&
!entry.IsConceptualNull(property))
{
DetectValueChange(entry, property);
}
DetectKeyChange(entry, property);
}
if (entry.HasRelationshipSnapshot)
{
foreach (var navigation in entityType.GetNavigations())
{
DetectNavigationChange(entry, navigation);
}
foreach (var navigation in entityType.GetSkipNavigations())
{
DetectNavigationChange(entry, navigation);
}
}
}
private bool TryCreateFromCurrentValues(InternalEntityEntry entry, out TKey key)
{
// TODO: Move into delegate
foreach (var property in _foreignKey.Properties)
{
if (entry.IsConceptualNull(property))
{
key = default;
return(false);
}
}
return(_dependentKeyValueFactory.TryCreateFromCurrentValues(entry, out key));
}
/// <summary>
/// This API supports the Entity Framework Core infrastructure and is not intended to be used
/// directly from your code. This API may change or be removed in future releases.
/// </summary>
public virtual void DetectChanges(InternalEntityEntry entry)
{
var entityType = entry.EntityType;
foreach (var property in entityType.GetProperties())
{
if (property.GetOriginalValueIndex() >= 0 &&
!entry.IsModified(property) &&
!entry.IsConceptualNull(property))
{
var current = entry[property];
var original = entry.GetOriginalValue(property);
var comparer = property.GetValueComparer() ?? property.FindMapping()?.Comparer;
if (comparer == null)
{
if (!Equals(current, original))
{
LogChangeDetected(entry, property, original, current);
entry.SetPropertyModified(property);
}
}
else
{
if (!comparer.Equals(current, original))
{
LogChangeDetected(entry, property, original, current);
entry.SetPropertyModified(property);
}
}
}
}
foreach (var property in entityType.GetProperties())
{
DetectKeyChange(entry, property);
}
if (entry.HasRelationshipSnapshot)
{
foreach (var navigation in entityType.GetNavigations())
{
DetectNavigationChange(entry, navigation);
}
}
}
/// <summary>
/// This is an internal API that supports the Entity Framework Core infrastructure and not subject to
/// the same compatibility standards as public APIs. It may be changed or removed without notice in
/// any release. You should only use it directly in your code with extreme caution and knowing that
/// doing so can result in application failures when updating to a new Entity Framework Core release.
/// </summary>
public virtual void KeyPropertyChanged(
InternalEntityEntry entry,
IProperty property,
IReadOnlyList <IKey> containingPrincipalKeys,
IReadOnlyList <IForeignKey> containingForeignKeys,
object oldValue,
object newValue)
{
if (entry.EntityState == EntityState.Detached)
{
return;
}
try
{
_inFixup = true;
var stateManager = entry.StateManager;
foreach (var foreignKey in containingForeignKeys)
{
var newPrincipalEntry = stateManager.FindPrincipal(entry, foreignKey)
?? stateManager.FindPrincipalUsingPreStoreGeneratedValues(entry, foreignKey);
var oldPrincipalEntry = stateManager.FindPrincipalUsingRelationshipSnapshot(entry, foreignKey);
var principalToDependent = foreignKey.PrincipalToDependent;
if (principalToDependent != null)
{
if (oldPrincipalEntry != null &&
oldPrincipalEntry.EntityState != EntityState.Deleted)
{
// Remove this entity from the principal collection that it was previously part of,
// or null the navigation for a 1:1 unless that reference was already changed.
ResetReferenceOrRemoveCollection(oldPrincipalEntry, principalToDependent, entry, fromQuery: false);
}
if (newPrincipalEntry != null &&
!entry.IsConceptualNull(property))
{
// Add this entity to the collection of the new principal, or set the navigation for a 1:1
SetReferenceOrAddToCollection(newPrincipalEntry, principalToDependent, entry, fromQuery: false);
}
}
var dependentToPrincipal = foreignKey.DependentToPrincipal;
if (dependentToPrincipal != null)
{
if (newPrincipalEntry != null)
{
if (foreignKey.IsUnique)
{
// Dependent has been changed to point to a new principal.
// Find the dependent that previously pointed to the new principal and null out its FKs
// and navigation property. A.k.a. reference stealing.
// However, if the FK has already been changed or the reference is already set to point
// to something else, then don't change it.
var targetDependentEntry
= stateManager.GetDependentsUsingRelationshipSnapshot(newPrincipalEntry, foreignKey).FirstOrDefault();
if (targetDependentEntry != null &&
targetDependentEntry != entry)
{
ConditionallyNullForeignKeyProperties(targetDependentEntry, newPrincipalEntry, foreignKey);
if (ReferenceEquals(targetDependentEntry[dependentToPrincipal], newPrincipalEntry.Entity) &&
targetDependentEntry.StateManager.TryGetEntry(
targetDependentEntry.Entity, foreignKey.DeclaringEntityType)
!= null)
{
SetNavigation(targetDependentEntry, dependentToPrincipal, null, fromQuery: false);
}
}
}
if (!entry.IsConceptualNull(property))
{
SetNavigation(entry, dependentToPrincipal, newPrincipalEntry, fromQuery: false);
}
}
else if (oldPrincipalEntry != null)
{
if (ReferenceEquals(entry[dependentToPrincipal], oldPrincipalEntry.Entity) &&
entry.StateManager.TryGetEntry(entry.Entity, foreignKey.DeclaringEntityType) != null)
{
SetNavigation(entry, dependentToPrincipal, null, fromQuery: false);
}
}
else
{
if (entry[dependentToPrincipal] == null &&
entry.StateManager.TryGetEntry(entry.Entity, foreignKey.DeclaringEntityType) != null)
{
// FK has changed but navigation is still null
entry.SetIsLoaded(dependentToPrincipal, false);
}
}
}
stateManager.UpdateDependentMap(entry, foreignKey);
}
foreach (var key in containingPrincipalKeys)
{
stateManager.UpdateIdentityMap(entry, key);
// Propagate principal key values into FKs
foreach (var foreignKey in key.GetReferencingForeignKeys())
{
foreach (var dependentEntry in stateManager
.GetDependentsUsingRelationshipSnapshot(entry, foreignKey).ToList())
{
SetForeignKeyProperties(dependentEntry, entry, foreignKey, setModified: true, fromQuery: false);
}
if (foreignKey.IsOwnership)
{
continue;
}
// Fix up dependents that have been added by propagating through different foreign key
foreach (var dependentEntry in stateManager.GetDependents(entry, foreignKey).ToList())
{
var principalToDependent = foreignKey.PrincipalToDependent;
if (principalToDependent != null)
{
if (!entry.IsConceptualNull(property))
{
// Add this entity to the collection of the new principal, or set the navigation for a 1:1
SetReferenceOrAddToCollection(entry, principalToDependent, dependentEntry, fromQuery: false);
}
}
var dependentToPrincipal = foreignKey.DependentToPrincipal;
if (dependentToPrincipal != null)
{
if (!entry.IsConceptualNull(property))
{
SetNavigation(dependentEntry, dependentToPrincipal, entry, fromQuery: false);
}
}
}
}
}
entry.SetRelationshipSnapshotValue(property, newValue);
}
finally
{
_inFixup = false;
}
}