/// <summary>
///
/// </summary>
/// <param name="field"></param>
/// <param name="parameterName"></param>
/// <param name="index"></param>
/// <param name="dbSetting"></param>
/// <returns></returns>
internal static Action <TEntity, DbCommand> Get(Field field,
string parameterName,
int index,
IDbSetting dbSetting = null)
{
var key = (long)typeof(TEntity).GetHashCode() + field.GetHashCode() +
parameterName.GetHashCode() + index.GetHashCode();
if (cache.TryGetValue(key, out var func) == false)
{
func = FunctionFactory.CompileDbCommandToProperty <TEntity>(field, parameterName, index, dbSetting);
cache.TryAdd(key, func);
}
return(func);
}