/// <summary>
/// Find the first document using Linq expression. Returns null if not found. Must have indexes on predicate.
/// </summary>
public T FindOne(Expression <Func <T, bool> > predicate)
{
return(this.Find(QueryVisitor.Visit(predicate)).FirstOrDefault());
}
/// <summary>
/// Returns true if query returns any document. This method does not deserialize any document. Needs indexes on query expression
/// </summary>
public bool Exists(Expression <Func <T, bool> > predicate)
{
return(this.Exists(QueryVisitor.Visit(predicate)));
}
/// <summary>
/// Find documents inside a collection using Linq expression. Must have indexes in linq expression
/// </summary>
public IEnumerable <T> Find(Expression <Func <T, bool> > predicate)
{
return(this.Find(QueryVisitor.Visit(predicate)));
}
/// <summary>
/// Count documnets with a query. This method does not deserialize any document. Needs indexes on query expression
/// </summary>
public int Count(Expression <Func <T, bool> > predicate)
{
return(this.Count(QueryVisitor.Visit(predicate)));
}
/// <summary>
/// Delete document based on a LINQ query.
/// </summary>
public virtual int Delete(Expression <Func <T, bool> > predicate)
{
return(this.Delete(QueryVisitor.Visit(predicate)));
}
