/// <summary>
/// Returns a gradebook column with scores.
/// </summary>
/// <param name="id">The gradebook column id.</param>
/// <returns>The gradebook column.</returns>
public async Task <GradebookColumn> GetGradebookColumnAsync(int id)
{
return(await GradebookColumns
.Include(c => c.Scores)
.SingleOrDefaultAsync(c => c.Id == id));
}
/// <summary>
/// Returns the gradebook column for a resource link if there is exactly one. Otherwise
/// returns null.
/// </summary>
/// <param name="id">The resource link id.</param>
/// <returns>The gradebook column.</returns>
public async Task <GradebookColumn> GetGradebookColumnByResourceLinkIdAsync(int id)
{
var gradebooksColumns = await GradebookColumns.Where(c => c.ResourceLink.Id == id).ToListAsync();
return(gradebooksColumns.Count == 1 ? gradebooksColumns[0] : null);
}
