Question

I have the following function in my generic repository which works fine:

public IQueryable<T> FindWhere(System.Linq.Expressions.Expression<Func<T, bool>> predicate, params string[] includes)
{
        IQueryable<T> query = _dbSet;

        foreach (var child in includes)
        {
            query = query.Include(child);
        }

        return query.Where(predicate);            
}

I then also have this to find a single item:

public T FindById(int id)
{
        return _dbSet.Find(id);
}

What I need is an override for FindById that will allow me to pass in params string[] includes to allow me to eager load properties on the individual item found.

How can I do this?

Answer 1

You can use the entity entry to load the related entities, however you need to know relationship multiplicity:

entity = _dbSet.Find(id);

// Use this for a reference property
context.Entry(entity).Reference(propertyName).Load();

// Use this instead for a collection property
context.Entry(entity).Collection(propertyName).Load();