public async Task Execute(PangulDbContext db, UpdateQuestionTopic command)
{
command.Validate();
// Get existing question
var question = await _getQuestion.Execute(db, new GetQuestion()
{
UserContext = command.UserContext,
LightWeightOnly = false,
QuestionId = command.QuestionId,
RowVersion = command.RowVersion,
});
if (question == null)
{
throw new PangulCommandFailedException(CommandFailureType.MissingData, $"No such question ({command.QuestionId}, {command.RowVersion})");
}
// Verify user has permission
await _internalUserPermissionService.RequireWriteAccessFor(question, command.UserContext);
question.TopicId = command.Derived.Topic.TopicId;
}
