在ServiceStack.OrmLite中获取运行时的类的表名/避免硬编码表名

Question

I use ServiceStack.OrmLite and want to get the total count of rows from a table. I currently do as pointed out in the ServiceStack.OrmLite documentation via

db.Scalar<int>("SELECT COUNT(*) FROM User");

However, the table's name User might change in the future so I am looking for a way not to hardcode it. Is it possible to get the table's name from its according class, like ie

string table_name = db.GetTableName<User> ();
db.Scalar<int>("SELECT COUNT(*) FROM {0}", table_name);

?

Answer 1

The 2 ways to access the config metadata of your types is with:

ModelDefinition<User>.Definition.ModelName;
typeof(User).GetModelMetadata().ModelName;

Although in some databases you need to quote your table name, you can do this with:

var modelDef = ModelDefinition<User>.Definition;
OrmLiteConfig.DialectProvider.GetQuotedTableName(modelDef)

So yeah you can wrap this in an extension method that does what you want with:

public static MyOrmLiteExtensions {
    public static string GetTableName<T>(this IDbConnection db) {
        var modelDef = ModelDefinition<T>.Definition;
        return OrmLiteConfig.DialectProvider.GetQuotedTableName(modelDef);
    }
}