internal LiteCollection(string name, DbEngine engine, BsonMapper mapper, Logger log)
{
_name = name;
_engine = engine;
_mapper = mapper;
_log = log;
_visitor = new QueryVisitor <T>(mapper);
_includes = new List <Action <BsonDocument> >();
}
public LiteCollection(string name, LazyLoad <LiteEngine> engine, BsonMapper mapper, LoggerWrap log)
{
_name = name ?? mapper.ResolveCollectionName(typeof(T));
_engine = engine;
_mapper = mapper;
_log = log;
_visitor = new QueryVisitor <T>(mapper);
_includes = new List <Action <BsonDocument> >();
}
/// <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>
/// 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>
/// 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>
/// Create a new permanent index in all documents inside this collections if index not exists already.
/// </summary>
/// <param name="property">Property linq expression</param>
/// <param name="unique">Create a unique values index?</param>
public virtual bool EnsureIndex <K>(Expression <Func <T, K> > property, bool unique = false)
{
var p = QueryVisitor.GetProperty <T, K>(property);
return(this.EnsureIndex(p.Name, unique));
}
/// <summary>
/// Delete document based on a LINQ query.
/// </summary>
public virtual int Delete(Expression <Func <T, bool> > predicate)
{
return(this.Delete(QueryVisitor.Visit(predicate)));
}