Ejemplo n.º 1
0
 public KendoGridEx(KendoGridBaseRequest request,
                    IEnumerable <TModel> source,
                    IEnumerable <string> includes = null,
                    Dictionary <string, MapExpression <TModel> > mappings        = null,
                    Func <IQueryable <TModel>, IEnumerable <TModel> > conversion = null)
     : base(request, source.AsQueryable(), mappings, conversion, includes)
 {
 }
Ejemplo n.º 2
0
        public KendoGrid(
            [NotNull] KendoGridBaseRequest request,
            [NotNull] IQueryable <TEntity> query,
            [CanBeNull] Dictionary <string, MapExpression <TEntity> > mappings            = null,
            [CanBeNull] Func <IQueryable <TEntity>, IEnumerable <TViewModel> > conversion = null,
            [CanBeNull] IEnumerable <string> includes = null)
        {
            Guard.NotNull(request, nameof(request));
            Guard.NotNull(query, nameof(query));

            _mappings   = mappings;
            _conversion = conversion;

            IList <string> includesAsList = null;

            if (includes != null)
            {
                includesAsList = includes.ToList();
            }

            var tempQuery = request.FilterObjectWrapper != null?ApplyFiltering(query, request.FilterObjectWrapper) : query;

            Total = tempQuery.Count();

            if (request.AggregateObjects != null)
            {
                Aggregates = ApplyAggregates(tempQuery, includesAsList, request);
            }

            if (request.GroupObjects != null)
            {
                Groups = ApplyGroupingAndSorting(tempQuery, includesAsList, request);

                _query = null;
                Data   = null;
            }
            else
            {
                tempQuery = ApplySorting(tempQuery, request.SortObjects);

                // Paging
                if (request.Skip.HasValue && request.Skip > 0)
                {
                    tempQuery = tempQuery.Skip(request.Skip.Value);
                }
                if (request.Take.HasValue && request.Take > 0)
                {
                    tempQuery = tempQuery.Take(request.Take.Value);
                }

                _query = tempQuery;

                Data = _conversion?.Invoke(_query).ToList() ?? _query.ToList().OfType <TViewModel>();

                Groups = null;
            }
        }
Ejemplo n.º 3
0
 public KendoGrid(
     [NotNull] KendoGridBaseRequest request,
     [NotNull] IEnumerable <dynamic> source,
     [CanBeNull] Dictionary <string, MapExpression <dynamic> > mappings         = null,
     [CanBeNull] Func <IQueryable <dynamic>, IEnumerable <dynamic> > conversion = null,
     [CanBeNull] IEnumerable <string> includes = null
     )
     : base(request, source.AsQueryable(), mappings, conversion, includes)
 {
 }
Ejemplo n.º 4
0
        public IEnumerable <TViewModel> FilterBy <TEntity, TViewModel>([NotNull] IQueryable <TEntity> query,
                                                                       KendoGridBaseRequest request,
                                                                       IEnumerable <string> includes = null,
                                                                       Dictionary <string, MapExpression <TEntity> > mappings            = null,
                                                                       Func <IQueryable <TEntity>, IEnumerable <TViewModel> > conversion = null,
                                                                       bool canUseAutoMapperProjection = false)
        {
            var mappings2   = _autoMapperUtils.GetModelMappings <TEntity, TViewModel>(mappings);
            var conversion2 = conversion ?? GetAutoMapperConversion <TEntity, TViewModel>(canUseAutoMapperProjection);

            return(new KendoGrid <TEntity, TViewModel>(request, query, mappings2, conversion2, includes).Data);
        }
Ejemplo n.º 5
0
        protected IEnumerable <KendoGroup> ApplyGroupingAndSorting(IQueryable <TEntity> query, IList <string> includes, KendoGridBaseRequest request)
        {
            bool   hasAggregates        = request.GroupObjects.Any(g => g.AggregateObjects.Any());
            string aggregatesExpression = string.Empty;

            if (hasAggregates)
            {
                // In case of sum, min or max: convert it to sum(TEntity__.XXX) as sum_XXX
                // In case of count, convert it to count() as count_XXX
                var convertedAggregateObjects = request.GroupObjects
                                                .SelectMany(g => g.AggregateObjects)
                                                .Select(a => a.GetLinqAggregate(MapFieldfromViewModeltoEntity))
                                                .Distinct()
                                                .ToList();

                // , new (sum(TEntity__.EmployeeNumber) as sum__Number) as Aggregates
                aggregatesExpression = $", new ({string.Join(", ", convertedAggregateObjects)}) as Aggregates";
            }

            var  sort           = request.SortObjects?.ToList() ?? new List <SortObject>();
            bool hasSortObjects = sort.Any();

            // List[0] = LastName as Last
            var groupByFields = request.GroupObjects.Select(s => $"{MapFieldfromViewModeltoEntity(s.Field)} as {s.Field}").ToList();

            // new (new (LastName as Last) as GroupByFields)
            var groupByExpressionX = $"new (new ({string.Join(",", groupByFields)}) as GroupByFields)";

            // new (Key.GroupByFields, it as Grouping, new (sum(TEntity__.EmployeeNumber) as sum__TEntity___EmployeeNumber) as Aggregates)
            var selectExpressionBeforeOrderByX = $"new (Key.GroupByFields, it as Grouping {aggregatesExpression})";
            var groupSort = string.Join(",", request.GroupObjects.ToList().Select(s => $"{MapFieldfromViewModeltoEntity(s.Field)} {s.Direction}"));

            // Adam Downs moved sort to items vs group
            var orderByFieldsExpression = hasSortObjects ?
                                          string.Join(",", sort.Select(s => $"{MapFieldfromViewModeltoEntity(s.Field)} {s.Direction}")) :
                                          MapFieldfromViewModeltoEntity(request.GroupObjects.First().Field);

            // new (GroupByFields, Grouping, Aggregates)
            var selectExpressionAfterOrderByX = $"new (GroupByFields, Grouping{(hasAggregates ? ", Aggregates" : string.Empty)})";

            string includesX = string.Empty;

            if (includes != null && includes.Any())
            {
                includesX = ", " + string.Join(", ", includes.Select(i => "it." + i + " as TEntity__" + i.Replace(".", "_")));
            }

            IOrderedQueryable <TEntity> limitedQueryOrdered = query.OrderBy(string.Join(",", groupSort, orderByFieldsExpression));
            IQueryable <TEntity>        limitedQuery        = limitedQueryOrdered;

            // Execute the Dynamic Linq for Paging
            if (request.Skip.HasValue && request.Skip > 0)
            {
                limitedQuery = limitedQueryOrdered.Skip(request.Skip.Value);
            }
            if (request.Take.HasValue && request.Take > 0)
            {
                limitedQuery = limitedQueryOrdered.Take(request.Take.Value);
            }

            // Execute the Dynamic Linq "GroupBy"
            var groupByQuery = limitedQuery.GroupBy(groupByExpressionX, $"new (it AS TEntity__{includesX})");

            // Execute the Dynamic Linq "Select"
            var selectQuery = groupByQuery.Select(selectExpressionBeforeOrderByX);

            // Execute the Dynamic Linq "OrderBy"
            var orderByQuery = selectQuery.OrderBy(string.Join(",", request.GroupObjects.Select(s => $"GroupByFields.{s.Field} {s.Direction}").ToList()));

            // Execute the Dynamic Linq "Select" to get back the TEntity objects
            var tempQuery = orderByQuery.Select(selectExpressionAfterOrderByX, typeof(TEntity));

            // Create a valid List<KendoGroup> object
            var list = new List <KendoGroup>();

            foreach (DynamicClass item in tempQuery.ToDynamicList <DynamicClass>())
            {
                var grouping          = item.GetDynamicPropertyValue <IGrouping <object, object> >("Grouping");
                var groupByDictionary = item.GetDynamicPropertyValue <object>("GroupByFields").ToDictionary();
                var aggregates        = item.GetAggregatesAsDictionary();

                Process(request.GroupObjects, groupByDictionary, grouping, aggregates, list);
            }

            return(list);
        }
Ejemplo n.º 6
0
        private object ApplyAggregates(IQueryable <TEntity> query, IList <string> includes, KendoGridBaseRequest request)
        {
            // In case of average, sum, min or max: convert it to sum(TEntity__.XXX) as sum_XXX
            // In case of count, convert it to count() as count_XXX
            var convertedAggregateObjects = request.AggregateObjects
                                            .Select(a => a.GetLinqAggregate(MapFieldfromViewModeltoEntity))
                                            .Distinct()
                                            .ToList();

            string includesX = string.Empty;

            if (includes != null && includes.Any())
            {
                includesX = ", " + string.Join(", ", includes.Select(i => "it." + i + " as TEntity__" + i.Replace(".", "_")));
            }

            // Execute the Dynamic Linq "Select" to get TEntity__ (and includes if needed). Also add a fake __Key__ property to allow grouping
            // Example : new ("__Key__" as __Key__, it AS TEntity__, it.Company as TEntity__Company, it.Company.MainCompany as TEntity__Company_MainCompany, it.Country as TEntity__Country)
            var selectTEntityQuery = query.Select($"new (\"__Key__\" as __Key__, it AS TEntity__{includesX})");

            // Group by the __Key__ to allow aggregates to be calculated
            var groupByQuery = selectTEntityQuery.GroupBy("__Key__");

            // Execute the Dynamic Linq "Select" to add the aggregates
            // Example : new (new (Sum(TEntity__.Id) as sum__Id, Min(TEntity__.Id) as min__Id, Max(TEntity__.Id) as max__Id, Count() as count__Id, Average(TEntity__.Id) as average__Id) as Aggregates)
            string aggregatesExpression = $"new (new ({string.Join(", ", convertedAggregateObjects)}) as Aggregates)";
            var    aggregatesQuery      = groupByQuery.Select(aggregatesExpression);

            // Try to get first result, cast to DynamicClass as use helper method to convert this to correct response
            var aggregates = (aggregatesQuery.FirstOrDefault() as DynamicClass).GetAggregatesAsDictionary();

            return(aggregates);
        }