private static string GenerateColumnDefaultConstraint(ColumnModel column, string command)
{
// Obtain annotation info
var deserialize = true;
AnnotationValues values;
column.Annotations.TryGetValue(DefaultConstraintAnnotationConvention.AnnotationName, out values);
if (values == null)
{
column.Annotations.TryGetValue(DefaultValueAnnotationConvention.AnnotationName, out values);
if (values == null)
{
return(command);
}
deserialize = false;
}
// Do SQL generation for column using annotation value as appropriate.
var serialized = values.NewValue as string;
// Exit if no value is defined.
if (serialized == null)
{
return(command);
}
// Remove any other default constraint.
var indexOfDefault = command.IndexOf(" DEFAULT ", StringComparison.InvariantCulture);
if (indexOfDefault > 0)
{
command = command.Remove(indexOfDefault);
}
// Bind the constraint.
string name;
string value;
if (deserialize)
{
var config = DefaultConstraintConfiguration.Deserialize(serialized);
name = config.Name;
value = config.Value;
}
else
{
name = null;
value = serialized;
}
if (!string.IsNullOrWhiteSpace(name))
{
command += " CONSTRAINT [" + name + "]";
}
return(command + " DEFAULT " + value);
}
private static string AnnotationFactory(PropertyInfo propertyInfo, IList <DefaultConstraintAttribute> defaultValueAttributes)
{
var attribute = defaultValueAttributes.First();
var config = new DefaultConstraintConfiguration
{
Name = attribute.Name,
Value = attribute.Value
};
return(config.Serialize());
}
private bool GenerateColumnDefaultConstraint(AnnotationValues annotationValues, string tableName, string columnName)
{
if (annotationValues == null)
{
return(false);
}
var oldValue = annotationValues.OldValue as string;
var newValue = annotationValues.NewValue as string;
var modified = false;
// Drop default value.
if (oldValue != null)
{
var config = DefaultConstraintConfiguration.Deserialize(oldValue);
using (var writer = Writer())
{
DropColumnDefaultConstraint(writer, tableName, columnName, config.Name);
Statement(writer);
}
modified = true;
}
// Create default value.
if (newValue != null)
{
var config = DefaultConstraintConfiguration.Deserialize(newValue);
using (var writer = Writer())
{
CreateColumnDefaultConstraint(writer, tableName, columnName, config.Name, config.Value);
Statement(writer);
}
modified = true;
}
return(modified);
}
