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Wt
4.10.0
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Default traits for a class mapped with Wt::Dbo. More...
Public Types | |
| typedef long long | IdType |
| Type of the primary key. | |
Static Public Member Functions | |
| static IdType | invalidId () |
Returns the sentinel value for a null id. | |
| static const char * | surrogateIdField () |
| Returns the database field name for the surrogate primary key. | |
| static const char * | versionField () |
| Configures the optimistic concurrency version field. | |
Default traits for a class mapped with Wt::Dbo.
This class provides the default traits. It is convenient (and future proof) to inherit these default traits when customizing the traits for one particular class.
| typedef long long Wt::Dbo::dbo_default_traits::IdType |
Type of the primary key.
The default corresponds to a surrogate key, which is long long.
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Returns the sentinel value for a null id.
The default implementation returns -1.
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Returns the database field name for the surrogate primary key.
The default surrogate id database field name is "id".
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Configures the optimistic concurrency version field.
By default, optimistic concurrency locking is enabled using a "version" field.