Пример #1
0
 public override IQueryFilter GetUniqueFilter()
 {
     if (UniqueFilterProvider != null)
     {
         return(UniqueFilterProvider());
     }
     else
     {
         var colFilter = new ItemColumns();
         return(colFilter.KeyColumn == IdValue);
     }
 }
Пример #2
0
        public static long Count(WhereDelegate <ItemColumns> where, Database database = null)
        {
            ItemColumns  c      = new ItemColumns();
            IQueryFilter filter = where (c);

            Database db    = database ?? Db.For <Item>();
            QuerySet query = GetQuerySet(db);

            query.Count <Item>();
            query.Where(filter);
            query.Execute(db);
            return(query.Results.As <CountResult>(0).Value);
        }
Пример #3
0
        public static Item GetOneWhere(WhereDelegate <ItemColumns> where, Database database = null)
        {
            var result = OneWhere(where, database);

            if (result == null)
            {
                ItemColumns  c      = new ItemColumns();
                IQueryFilter filter = where (c);
                result = CreateFromFilter(filter, database);
            }

            return(result);
        }
Пример #4
0
 public static async Task BatchQuery(int batchSize, WhereDelegate <ItemColumns> where, Action <IEnumerable <Item> > batchProcessor, Database database = null)
 {
     await Task.Run(async() =>
     {
         ItemColumns columns = new ItemColumns();
         var orderBy         = Bam.Net.Data.Order.By <ItemColumns>(c => c.KeyColumn, Bam.Net.Data.SortOrder.Ascending);
         var results         = Top(batchSize, where, orderBy, database);
         while (results.Count > 0)
         {
             await Task.Run(() =>
             {
                 batchProcessor(results);
             });
             long topId = results.Select(d => d.Property <long>(columns.KeyColumn.ToString())).ToArray().Largest();
             results    = Top(batchSize, (ItemColumns) where (columns) && columns.KeyColumn > topId, orderBy, database);
         }
     });
 }
Пример #5
0
        public static ItemCollection Top(int count, WhereDelegate <ItemColumns> where, OrderBy <ItemColumns> orderBy, Database database = null)
        {
            ItemColumns  c      = new ItemColumns();
            IQueryFilter filter = where (c);

            Database db    = database ?? Db.For <Item>();
            QuerySet query = GetQuerySet(db);

            query.Top <Item>(count);
            query.Where(filter);

            if (orderBy != null)
            {
                query.OrderBy <ItemColumns>(orderBy);
            }

            query.Execute(db);
            var results = query.Results.As <ItemCollection>(0);

            results.Database = db;
            return(results);
        }
Пример #6
0
        }               /// <summary>
        /// Gets a query filter that should uniquely identify
        /// the current instance.  The default implementation
        /// compares the Id/key field to the current instance.
        /// </summary>
        public override IQueryFilter GetUniqueFilter()
        {
            var colFilter = new ItemColumns();

            return(colFilter.Id == IdValue);
        }