protected static AttributeCollection AddDefaultAttributes(ColumnProvider columnProvider, AttributeCollection attributes) {
List<Attribute> extraAttributes = new List<Attribute>();
// If there is no required attribute and the Provider says required, add one
var requiredAttribute = attributes.FirstOrDefault<RequiredAttribute>();
if (requiredAttribute == null && !columnProvider.Nullable) {
extraAttributes.Add(new RequiredAttribute());
}
// If there is no StringLength attribute and it's a string, add one
var stringLengthAttribute = attributes.FirstOrDefault<StringLengthAttribute>();
int maxLength = columnProvider.MaxLength;
if (stringLengthAttribute == null && columnProvider.ColumnType == typeof(String) && maxLength > 0) {
extraAttributes.Add(new StringLengthAttribute(maxLength));
}
// If we need any extra attributes, create a new collection
if (extraAttributes.Count > 0) {
attributes = AttributeCollection.FromExisting(attributes, extraAttributes.ToArray());
}
return attributes;
}
