public static PropertySaveBehavior GetAfterSaveBehavior([NotNull] this IReadOnlyProperty property)
=> (PropertySaveBehavior?)Check.NotNull(property, nameof(property))[CoreAnnotationNames.AfterSaveBehavior]
?? (property.IsKey()
? PropertySaveBehavior.Throw
: property.ValueGenerated.ForUpdate()
? PropertySaveBehavior.Ignore
: PropertySaveBehavior.Save);
/// <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 static bool RequiresValueGenerator(this IReadOnlyProperty property)
=> (property.ValueGenerated.ForAdd() &&
property.IsKey() &&
(!property.IsForeignKey() ||
property.IsForeignKeyToSelf() ||
(property.GetContainingForeignKeys().All(fk => fk.Properties.Any(p => p != property && p.IsNullable))))) ||
property.GetValueGeneratorFactory() != null;
public static bool IsForeignKeyToSelf([NotNull] this IReadOnlyProperty property)
{
Check.DebugAssert(property.IsKey(), "Only call this method for properties known to be part of a key.");
foreach (var foreignKey in property.GetContainingForeignKeys())
{
var propertyIndex = foreignKey.Properties.IndexOf(property);
if (propertyIndex == foreignKey.PrincipalKey.Properties.IndexOf(property))
{
return(true);
}
}
return(false);
}
public static string ToDebugString(
[NotNull] this IReadOnlyProperty property,
MetadataDebugStringOptions options,
int indent = 0)
{
var builder = new StringBuilder();
var indentString = new string(' ', indent);
builder.Append(indentString);
var singleLine = (options & MetadataDebugStringOptions.SingleLine) != 0;
if (singleLine)
{
builder.Append($"Property: {property.DeclaringEntityType.DisplayName()}.");
}
builder.Append(property.Name).Append(" (");
var field = property.GetFieldName();
if (field == null)
{
builder.Append("no field, ");
}
else if (!field.EndsWith(">k__BackingField", StringComparison.Ordinal))
{
builder.Append(field).Append(", ");
}
builder.Append(property.ClrType.ShortDisplayName()).Append(")");
if (property.IsShadowProperty())
{
builder.Append(" Shadow");
}
if (property.IsIndexerProperty())
{
builder.Append(" Indexer");
}
if (!property.IsNullable)
{
builder.Append(" Required");
}
if (property.IsPrimaryKey())
{
builder.Append(" PK");
}
if (property.IsForeignKey())
{
builder.Append(" FK");
}
if (property.IsKey() &&
!property.IsPrimaryKey())
{
builder.Append(" AlternateKey");
}
if (property.IsIndex())
{
builder.Append(" Index");
}
if (property.IsConcurrencyToken)
{
builder.Append(" Concurrency");
}
if (property.GetBeforeSaveBehavior() != PropertySaveBehavior.Save)
{
builder.Append(" BeforeSave:").Append(property.GetBeforeSaveBehavior());
}
if (property.GetAfterSaveBehavior() != PropertySaveBehavior.Save)
{
builder.Append(" AfterSave:").Append(property.GetAfterSaveBehavior());
}
if (property.ValueGenerated != ValueGenerated.Never)
{
builder.Append(" ValueGenerated.").Append(property.ValueGenerated);
}
if (property.GetMaxLength() != null)
{
builder.Append(" MaxLength(").Append(property.GetMaxLength()).Append(")");
}
if (property.IsUnicode() == false)
{
builder.Append(" Ansi");
}
if (property.GetPropertyAccessMode() != PropertyAccessMode.PreferField)
{
builder.Append(" PropertyAccessMode.").Append(property.GetPropertyAccessMode());
}
if ((options & MetadataDebugStringOptions.IncludePropertyIndexes) != 0 &&
((Annotatable)property).IsReadOnly)
{
var indexes = ((IProperty)property).GetPropertyIndexes();
builder.Append(" ").Append(indexes.Index);
builder.Append(" ").Append(indexes.OriginalValueIndex);
builder.Append(" ").Append(indexes.RelationshipIndex);
builder.Append(" ").Append(indexes.ShadowIndex);
builder.Append(" ").Append(indexes.StoreGenerationIndex);
}
if (!singleLine && (options & MetadataDebugStringOptions.IncludeAnnotations) != 0)
{
builder.Append(property.AnnotationsToDebugString(indent + 2));
}
return(builder.ToString());
}
public static bool RequiresValueGenerator([NotNull] this IReadOnlyProperty property)
=> (property.ValueGenerated.ForAdd() &&
property.IsKey() &&
(!property.IsForeignKey() || property.IsForeignKeyToSelf())) ||
property.GetValueGeneratorFactory() != null;
public static bool RequiresOriginalValue([NotNull] this IReadOnlyProperty property) => property.DeclaringEntityType.GetChangeTrackingStrategy() != ChangeTrackingStrategy.ChangingAndChangedNotifications || property.IsConcurrencyToken || property.IsKey() || property.IsForeignKey() || property.IsUniqueIndex();
