public ColumnDescriptor(PropertyInfo property, ISqlAdapter sqlAdapter)
{
if (property == null)
{
return;
}
var columnAttribute = property.GetCustomAttribute <ColumnAttribute>();
if (columnAttribute != null)
{
Name = columnAttribute.Name;
TypeName = columnAttribute.TypeName;
DefaultValue = columnAttribute.DefaultValue;
}
if (Name.IsNull())
{
Name = property.Name;
}
PropertyInfo = property;
IsPrimaryKey = Attribute.GetCustomAttributes(property).Any(attr => attr.GetType() == typeof(KeyAttribute));
if (!IsPrimaryKey)
{
IsPrimaryKey = property.Name.Equals("Id", StringComparison.OrdinalIgnoreCase);
}
var lengthAtt = property.GetCustomAttribute <LengthAttribute>();
if (lengthAtt != null)
{
Length = lengthAtt.Length < 1 ? 50 : lengthAtt.Length;
}
var maxAtt = property.GetCustomAttribute <MaxAttribute>();
Max = maxAtt != null;
if (property.PropertyType.IsNullable())
{
Nullable = true;
}
else
{
var nullableAtt = property.GetCustomAttribute <NullableAttribute>();
Nullable = nullableAtt != null;
}
var precisionAtt = property.GetCustomAttribute <PrecisionAttribute>();
if (precisionAtt != null)
{
PrecisionM = precisionAtt.M;
PrecisionD = precisionAtt.D;
}
//解析列类型名称和默认值
var typeName = sqlAdapter.GetColumnTypeName(this, out string defaultValue);
if (TypeName.IsNull())
{
TypeName = typeName;
}
if (DefaultValue.IsNull())
{
DefaultValue = defaultValue;
}
}
