/// <summary>
/// Creates a new TableInfo for the specified type, with optional table mapper.
/// </summary>
/// <param name="type">The entity <see cref="Type"/>.</param>
/// <param name="tableNameMapper">A delegate for how to generate the table name from the <paramref name="type"/>.</param>
/// <exception cref="ArgumentNullException"><paramref name="type"/></exception>
public TableInfo(Type type, TableNameMapperDelegate tableNameMapper)
{
ClassType = type ?? throw new ArgumentNullException(nameof(type));
if (tableNameMapper != null)
{
TableName = TableNameMapper(type);
}
else
{
var tableAttr = type.GetCustomAttributes(false).SingleOrDefaultOfType("TableAttribute");
if (tableAttr != null)
{
TableName = tableAttr.Name;
if (tableAttr.Schema != null)
{
SchemaName = tableAttr.Schema;
}
}
else
{
TableName = type.Name + "s";
if (type.IsInterface && TableName.StartsWith("I"))
{
TableName = TableName.Substring(1);
}
}
}
Columns = type.GetProperties()
.Where(typeProperty => !typeProperty.GetCustomAttributes(false).AnyOfType <IgnoreAttribute>())
.Select(typeProperty =>
{
var attributes = typeProperty.GetCustomAttributes(false);
var columnAtt = attributes.SingleOrDefaultOfType("ColumnAttribute");
var seqAtt = attributes.SingleOrDefaultOfType <SequenceAttribute>();
var genAtt = attributes.SingleOrDefaultOfType <DatabaseGeneratedAttribute>();
var hasReadOnlyAttribute = attributes.AnyOfType <ReadOnlyAttribute>();
// Microsoft implies that TimestampAttribute is equivalent to ConcurrencyCheck + IsGenerated.
// @see https://www.learnentityframeworkcore.com/configuration/data-annotation-attributes/timestamp-attribute
var hasTimestampAttribute = attributes.OfType <TimestampAttribute>().Any();
var ci = new ColumnInfo
{
Property = typeProperty,
ColumnName = columnAtt?.Name ?? typeProperty.Name,
PropertyName = typeProperty.Name,
IsKey = attributes.AnyOfType <KeyAttribute>(),
IsIdentity = genAtt?.DatabaseGeneratedOption == DatabaseGeneratedOption.Identity ||
seqAtt != null,
IsGenerated = genAtt != null && genAtt.DatabaseGeneratedOption != DatabaseGeneratedOption.None ||
seqAtt != null ||
hasTimestampAttribute,
IsConcurrencyToken = hasTimestampAttribute ||
attributes.AnyOfType <ConcurrencyCheckAttribute>(),
ExcludeOnSelect = attributes.AnyOfType <IgnoreSelectAttribute>(),
SequenceName = seqAtt?.Name
};
ci.IsNullable = !ci.IsKey && // do not allow Keys to be nullable
!attributes.AnyOfType <RequiredAttribute>() && // Required cannot be null. LATER: do we want to validate empty values? Using this for pre-C# 8 nullable enforcement
ci.Property.IsNullable();
ci.ExcludeOnInsert = ci.IsGenerated && seqAtt == null ||
attributes.AnyOfType <IgnoreInsertAttribute>() ||
hasReadOnlyAttribute;
ci.ExcludeOnUpdate = ci.IsGenerated ||
attributes.AnyOfType <IgnoreUpdateAttribute>() ||
hasReadOnlyAttribute;
if (!ci.IsGenerated)
{
return(ci);
}
var parameter = Expression.Parameter(type);
var property = Expression.Property(parameter, ci.Property);
var conversion = Expression.Convert(property, typeof(object));
var lambda = Expression.Lambda(conversion, parameter);
ci.Output = lambda;
return(ci);
})
.ToArray();
if (!Columns.Any(columnInfo => columnInfo.IsKey))
{
var idProp = Columns.FirstOrDefault(columnInfo =>
string.Equals(columnInfo.PropertyName, "id", StringComparison.CurrentCultureIgnoreCase));
if (idProp != null)
{
idProp.IsKey = idProp.IsGenerated =
idProp.IsIdentity = idProp.ExcludeOnInsert = idProp.ExcludeOnUpdate = true;
}
}
_insertColumns =
new Lazy <IEnumerable <ColumnInfo> >(() => Columns.Where(ci => !ci.ExcludeOnInsert), true);
_updateColumns =
new Lazy <IEnumerable <ColumnInfo> >(() => Columns.Where(ci => !ci.ExcludeOnUpdate), true);
_selectColumns =
new Lazy <IEnumerable <ColumnInfo> >(() => Columns.Where(ci => !ci.ExcludeOnSelect), true);
_keyColumns = new Lazy <IEnumerable <ColumnInfo> >(() => Columns.Where(ci => ci.IsKey), true);
_generatedColumns = new Lazy <IEnumerable <ColumnInfo> >(() => Columns.Where(ci => ci.IsGenerated), true);
_concurrencyCheckColumns = new Lazy <IEnumerable <ColumnInfo> >(() => Columns.Where(ci => ci.IsConcurrencyToken), true);
_comparisonColumns = new Lazy <IEnumerable <ColumnInfo> >(() => Columns.Where(ci => ci.IsKey || ci.IsConcurrencyToken), true);
_propertyList = new Lazy <IEnumerable <PropertyInfo> >(() => Columns.Select(ci => ci.Property), true);
}
/// <summary>
///
/// </summary>
/// <param name="type"></param>
/// <param name="tablenameMapper"></param>
public TableInfo(Type type, TableNameMapperDelegate tablenameMapper)
{
ClassType = type;
if (tablenameMapper != null)
{
TableName = TableNameMapper(type);
}
else
{
//NOTE: This as dynamic trick should be able to handle both our own Table-attribute as well as the one in EntityFramework
var tableAttr = type
#if NETSTANDARD1_3
.GetTypeInfo()
#endif
.GetCustomAttributes(false).SingleOrDefault(attr => attr.GetType().Name == "TableAttribute") as dynamic;
if (tableAttr != null)
{
TableName = tableAttr.Name;
if (tableAttr.Schema != null)
{
SchemaName = tableAttr.Schema;
}
}
else
{
TableName = type.Name + "s";
if (type.IsInterface() && TableName.StartsWith("I"))
{
TableName = TableName.Substring(1);
}
}
}
ColumnInfos = type.GetProperties()
.Where(t => t.GetCustomAttributes(typeof(IgnoreAttribute), false).Count() == 0)
.Select(t =>
{
var columnAtt = t.GetCustomAttributes(false).SingleOrDefault(attr => attr.GetType().Name == "ColumnAttribute") as dynamic;
var ci = new ColumnInfo
{
Property = t,
ColumnName = columnAtt?.Name ?? t.Name,
PropertyName = t.Name,
IsKey = t.GetCustomAttributes(true).Any(a => a is KeyAttribute),
IsIdentity = t.GetCustomAttributes(true).Any(a => a is DatabaseGeneratedAttribute &&
(a as DatabaseGeneratedAttribute).DatabaseGeneratedOption == DatabaseGeneratedOption.Identity),
IsGenerated = t.GetCustomAttributes(true).Any(a => a is DatabaseGeneratedAttribute &&
(a as DatabaseGeneratedAttribute).DatabaseGeneratedOption != DatabaseGeneratedOption.None),
ExcludeOnSelect = t.GetCustomAttributes(true).Any(a => a is IgnoreSelectAttribute)
};
ci.ExcludeOnInsert = ci.IsGenerated ||
t.GetCustomAttributes(true).Any(a => a is IgnoreInsertAttribute) ||
t.GetCustomAttributes(true).Any(a => a is ReadOnlyAttribute);
ci.ExcludeOnUpdate = ci.IsGenerated ||
t.GetCustomAttributes(true).Any(a => a is IgnoreUpdateAttribute) ||
t.GetCustomAttributes(true).Any(a => a is ReadOnlyAttribute);
return(ci);
})
.ToArray();
if (!ColumnInfos.Any(k => k.IsKey))
{
var idProp = ColumnInfos.FirstOrDefault(p => string.Equals(p.PropertyName, "id", StringComparison.CurrentCultureIgnoreCase));
if (idProp != null)
{
idProp.IsKey = idProp.IsGenerated = idProp.IsIdentity = idProp.ExcludeOnInsert = idProp.ExcludeOnUpdate = true;
}
}
}
