Summary
Configures a field of a class to allow unique values only.
- Assembly
- Db4objects
.Db4o-2010 .dll - Namespace
- Db4objects
.Db4o .Constraints - Interfaces
- Base Types
-
- Object
graph BT
Type-->Base0["Object"]
Type-.->Interface0["IConfigurationItem"]
click Interface0 "/db4o-gpl-doc/output/api/Db4objects.Db4o.Config/IConfigurationItem"
Type["UniqueFieldValueConstraint"]
class Type type-node
Syntax
public class UniqueFieldValueConstraint : IConfigurationItemRemarks
Configures a field of a class to allow unique values only.
In C/S mode, add this configuration-item to the server side only.
You need to turn on indexing for the given field, otherwise the unique constrain won't work.
Add this to your configuration with
Db4objects.Db4o.Config.ICommonConfiguration.Add(Db4objects.Db4o.Config.IConfigurationItem)
Constructors
| Name | Summary |
|---|---|
| Unique |
constructor to create a UniqueFieldValueConstraint. |
Fields
| Name | Constant Value | Summary |
|---|---|---|
| _clazz | ||
| _fieldName |
Methods
| Name | Value | Summary |
|---|---|---|
| Apply |
void |
internal method, public for implementation reasons.
|
| Prepare |
void |