public static SortDefinition <MongoContentEntity> BuildSort(ODataUriParser query, Schema schema)
{
var orderBy = query.ParseOrderBy();
if (orderBy != null)
{
var sorts = new List <SortDefinition <MongoContentEntity> >();
while (orderBy != null)
{
sorts.Add(OrderBy(orderBy, schema));
orderBy = orderBy.ThenBy;
}
if (sorts.Count > 1)
{
return(Sort.Combine(sorts));
}
else
{
return(sorts[0]);
}
}
else
{
return(Sort.Descending(x => x.LastModified));
}
}
public DbQuery <TEntity> Descending(Expression <Func <TEntity, object> > expression)
{
if (SortDefenition == null)
{
SortDefenition = _sortBuilder.Descending(expression);
}
else
{
SortDefenition = _sortBuilder.Combine(SortDefenition, _sortBuilder.Descending(expression));
}
return(this);
}
public SortDefinition <TSort> GetSortDefinition <TSort>(Expression <Func <IEnumerable <TSort>, dynamic> > orderBy)
{
var stackMember = new Stack <string>();
var stackSortMethod = new Stack <int>();
new SortExpressionParser().Parsing <TSort>(orderBy, stackMember, stackSortMethod);
if (stackMember.Any() && stackSortMethod.Any() && stackMember.Count == stackSortMethod.Count)
{
var length = stackMember.Count;
SortDefinitionBuilder <TSort> builder = new SortDefinitionBuilder <TSort>();
List <SortDefinition <TSort> > list = new List <SortDefinition <TSort> >();
for (var i = 0; i < length; i++)
{
var name = stackMember.Pop();
var way = stackSortMethod.Pop();
if (way == 1)
{
list.Add(builder.Ascending(name));
}
else
{
list.Add(builder.Descending(name));
}
}
var definition = builder.Combine(list);
return(definition);
}
return(null);
}
public static SortDefinition <T> Sort__ <T, SortType>(this SortDefinitionBuilder <T> builder, Expression <Func <T, SortType> > field, bool desc)
{
if (field.Body is MemberExpression exp)
{
var parameter_type = field.Parameters.FirstOrDefault()?.Type;
parameter_type.Should().NotBeNull();
var parameter = Expression.Parameter(parameter_type, "x");
var member = Expression.Property(parameter, propertyName: exp.Member.Name);
Expression body = member;
var sort_field = Expression.Lambda <Func <T, object> >(body: body, parameters: new[] { parameter });
if (desc)
{
return(builder.Descending(sort_field));
}
else
{
return(builder.Ascending(sort_field));
}
}
else
{
throw new NotSupportedException("不支持的排序lambda表达式");
}
}
/// <summary>
/// 构造排序
/// </summary>
/// <param name="interfaceSortId"></param>
/// <returns></returns>
private SortDefinition <BsonDocument> StructureSortDefinition(Guid interfaceSortId)
{
var builder = new SortDefinitionBuilder <BsonDocument>();
SortDefinition <BsonDocument> sort = null;
if (interfaceSortId == Guid.Empty)
{
return(builder.Ascending("_id"));
}
var sorts = _interfaceSortRepository.GetInterfaceSortByParentId(interfaceSortId) ?? new List <InterfaceSort>(0);
foreach (var item in sorts)
{
switch (item.GetSortType())
{
case SortTypeEnum.DESC:
sort = sort?.Descending(item.MetaFieldShortCode) ?? builder.Descending(item.MetaFieldShortCode);
break;
case SortTypeEnum.ASC:
sort = sort?.Ascending(item.MetaFieldShortCode) ?? builder.Ascending(item.MetaFieldShortCode);
break;
default:
break;
}
}
return(sort);
}
public SortDefinition <T> FilterConditionToSort <T>(List <FilterCondition> filter)
{
SortDefinitionBuilder <T> sort = Builders <T> .Sort;
SortDefinition <T> sd = null;
if (filter == null)
{
return(sd);
}
foreach (FilterCondition s in filter)
{
if (!s.OrderType.HasValue)
{
continue;
}
if (s.OrderType == TableOrderType.DESCENDING)
{
sd = sort.Combine(sort.Descending(s.Key));
}
else
{
sd = sort.Combine(sort.Ascending(s.Key));
}
}
return(sd);
}
SortDefinition <TEntity> BuildSortDefinitionFromFilterOptions(FilterOptions <TEntity> filterOptions)
{
if (filterOptions?.SortFields == null)
{
return(null);
}
var builder = new SortDefinitionBuilder <TEntity>();
SortDefinition <TEntity> sortDefinition = null;
foreach (var sortField in filterOptions.SortFields)
{
switch (sortField.Order)
{
case FilterOptions <TEntity> .SortOrderEnum.Ascending:
sortDefinition = sortDefinition?.Ascending(sortField.Field)
?? builder.Ascending(sortField.Field);
break;
case FilterOptions <TEntity> .SortOrderEnum.Descending:
sortDefinition = sortDefinition?.Descending(sortField.Field)
?? builder.Descending(sortField.Field);
break;
}
}
return(sortDefinition);
}
/// <summary>
/// Translates the Telerik SortDescriptor to the Mongo SortDefinition
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="request"></param>
/// <param name="sortBuilder"></param>
/// <returns></returns>
private static SortDefinition <T> GetSortDefinition <T>(DataSourceRequest request, SortDefinitionBuilder <T> sortBuilder)
{
SortDefinition <T> sort = null;
if (request.Sorts.Any())
{
// TODO: Support multiple sort statements
foreach (SortDescriptor sortDescriptor in request.Sorts)
{
if (sortDescriptor.SortDirection == ListSortDirection.Ascending)
{
sort = sortBuilder.Ascending(sortDescriptor.Member);
}
else
{
sort = sortBuilder.Descending(sortDescriptor.Member);
}
break;
}
}
else
{
// Might not need a default sort... I used it though for paging on the default mongo _Id
// TODO: Enhance or paramterise this
sort = Builders <T> .Sort.Ascending("_id");
}
return(sort);
}
public ItemList Query(string collection, DataQuery query)
{
FilterDefinition <BsonDocument> filter = FilterDefinition <BsonDocument> .Empty;
var dataContext = new Dictionary <string, object>();
dataContext["expando"] = query.Expando;
if (query.RawQuery != null)
{
filter = new JsonFilterDefinition <BsonDocument>(query.RawQuery);
}
InvokeAlterQuery(collection, filter);
IFindFluent <BsonDocument, BsonDocument> results = _mongoService
.GetCollection <BsonDocument>(collection).Find <BsonDocument>(filter)
.Skip((query.PageNumber - 1) * query.PageSize)
.Limit(query.PageSize);
if (query.Sort != null)
{
var sort = new SortDefinitionBuilder <BsonDocument>();
SortDefinition <BsonDocument> sortDef = null;
foreach (var sortable in query.Sort)
{
FieldDefinition <BsonDocument> field = sortable.Field;
if (sortable.Ascending)
{
sortDef = (sortDef == null) ? sort.Ascending(field) : sortDef.Ascending(field);
}
else
{
sortDef = (sortDef == null) ? sort.Descending(field) : sortDef.Descending(field);
}
}
results = results.Sort(sortDef);
}
long count = Count(collection, filter);
List <BsonDocument> list = results.ToList();
//sanitize id format
foreach (BsonDocument item in list)
{
item["_id"] = item["_id"].ToString();
}
string json = list.ToJson(js);
var result = JArray.Parse(json);
for (int i = 0; i < result.Count; i++)
{
var node = (JObject)result[i];
InvokeProcess(collection, ref node, PipelineStage.PostOperation, DataOperation.Read, dataContext);
}
return(new ItemList(result, (int)count, query.PageNumber, query.PageSize));
}
public List <T> GetPageDesc(Expression <Func <T, bool> > criteria, Expression <Func <T, object> > descSort, QueryParams pParams)
{
var sort = new SortDefinitionBuilder <T>();
var result = _collection.Find(criteria).Sort(sort.Descending(descSort)).Skip((pParams.Index - 1) * pParams.Size).Limit(
pParams.Size).ToList();
return(result);
}
async void HandleGet(string data, string id)
{
if (data.Length < 7)
{
Console.WriteLine("get input was too short at" + data.Length);
return;
}
var builder = Builders<listing>.Filter;
string thenby = sortBy.players.ToString(); //set second sort by initially to sort secondarily to current num of players...
//if we're actually requested to sort by that already, sort secondarily by max players instead
if (data[6] == sortBy.players)
{
thenby = sortBy.max.ToString();
}
//sanity check input of requested sort type to avoid some null reference exceptions
if (listing.dummy.GetType().GetField(data[6].ToString()) == null || listing.dummy.GetType().GetField(thenby) == null)
{
//invalid sort request input from user
//throw new ArgumentOutOfRangeException();
Console.WriteLine("invalid sort type requested: " + data[6].ToString());
return;
}
List<listing> membersList =
await
games.Find(new BsonDocument())
.Sort(sort.Descending(data[6].ToString()))
.Sort(sort.Descending(thenby))
.Limit(Program.numReturns)
.ToListAsync();
Console.WriteLine("found " + membersList.Count + " games");
Send(
mmcodes.get.ToString() + String.Join(delimeters.slistingGroups, membersList) //send each listing separated by delimeter, each listing being converted to string
);
} //end HandleGet
/// <summary>
/// 文档排序
/// </summary>
public void Sort()
{
SortDefinitionBuilder <Model2> sortBuilder = Builders <Model2> .Sort;
////按字段Field2A降序排列
SortDefinition <Model2> sort = sortBuilder.Descending(m => m.Field2A);
List <Model2> info = mongoDBService.FindAllList(collectionName, sort);
}
public int SearchBiggestVersionNo()
{
SortDefinitionBuilder <ShotNoVersionNo> builderSort = Builders <ShotNoVersionNo> .Sort;
SortDefinition <ShotNoVersionNo> sort = builderSort.Descending("VersionNo");
var result = MyCollection.Find <ShotNoVersionNo>(Builders <ShotNoVersionNo> .Filter.Empty).Sort(sort).ToList();
return(result[0].VersionNo);
}
private static SortDefinition <T> CreateODataSort <T>(IODataQuery query, bool check = false)
{
var orderby = query.Order;
SortDefinitionBuilder <T> sortBuilder = Builders <T> .Sort;
SortDefinition <T> sortDefinition = null;
SortDefinition <T> defaultSortDefinition = sortBuilder.Descending("CreateDate");
if (String.IsNullOrEmpty(orderby))
{
return(defaultSortDefinition);
}
var sections = orderby.Split(new string[] { "," }, StringSplitOptions.RemoveEmptyEntries);
foreach (var section in sections)
{
var order = section.Split(new string[] { " " }, StringSplitOptions.RemoveEmptyEntries);
var field = order.FirstOrDefault();
var direction = "asc";
if (check && !typeof(T).HasField(field))
{
continue;
}
if (order.LastOrDefault().ToLower() == "desc")
{
direction = "desc";
}
if (sortDefinition == null)
{
sortDefinition = direction == "asc"
? sortBuilder.Ascending(field)
: sortBuilder.Descending(field);
}
sortDefinition = direction == "asc"
? sortDefinition.Ascending(field)
: sortDefinition.Descending(field);
}
return(sortDefinition ?? defaultSortDefinition);
}
public async Task <List <DeviceStateHistory> > GetDeviceStateHistory(Guid deviceId, int days = 30)
{
DateTime startDateUtc = DateTime.UtcNow.AddDays((-1 * days));
FilterDefinition <DeviceStateHistory> filter = filterBuilder.Eq(d => d.DeviceId, deviceId)
& filterBuilder.Gte(d => d.Timestamp, startDateUtc);
SortDefinition <DeviceStateHistory> sort = sortBuilder.Descending(d => d.Version);
return(await deviceHistoryCollection.Find(filter).Sort(sort).ToListAsync());
}
private IEnumerable <TModel> FindAll(FilterDefinition <TModel> filter, QueryOptions <TModel> options)
{
ProjectionDefinition <TModel> projection = null;
foreach (var field in options.Fields)
{
if (projection == null)
{
projection = new ProjectionDefinitionBuilder <TModel>().Include(field);
}
else
{
projection = projection.Include(field);
}
}
SortDefinition <TModel> sortDefinition = null;
var builder = new SortDefinitionBuilder <TModel>();
if (options.SortAscending != null)
{
sortDefinition = builder.Ascending(options.SortAscending);
}
if (options.SortDescending != null)
{
sortDefinition = builder.Descending(options.SortDescending);
}
IFindFluent <TModel, TModel> result = null;
if (projection == null)
{
result = Collection.Find(filter);
}
else
{
result = Collection.Find(filter).Project <TModel>(projection);
}
if (options.Skip.HasValue)
{
result.Skip(options.Skip.Value);
}
if (options.Take.HasValue)
{
result.Limit(options.Take);
}
if (sortDefinition != null)
{
result.Sort(sortDefinition);
}
return(result.ToEnumerable());
}
public static SortDefinition <BsonDocument> GetCustomerSortDefinition()
{
var sortBuilder = new SortDefinitionBuilder <BsonDocument>();
var daySortDefinition = sortBuilder.Ascending("Day");
var monthSortDefinition = sortBuilder.Ascending("Month");
var netWorthSortDefinition = sortBuilder.Descending("NetWorth");
var yearSortDefinition = sortBuilder.Ascending("Year");
var sortDefinition = sortBuilder.Combine(daySortDefinition, monthSortDefinition, netWorthSortDefinition, yearSortDefinition);
return(sortDefinition);
}
public override async Task <IEnumerable <Article> > GetAll()
{
SortDefinitionBuilder <Article> builderSort = Builders <Article> .Sort;
var sort = builderSort.Descending("_id");
var options = new FindOptions <Article, Article>()
{
Sort = sort,
};
var cursor = await this._collection.FindAsync(new BsonDocument(), options);
return(await cursor.ToListAsync());
}
private static SortDefinition <T> GetSort(IFilter filter)
{
if (string.IsNullOrEmpty(filter?.SortColumn))
{
return(default(SortDefinition <T>));
}
var sortDefinition = new SortDefinitionBuilder <T>();
return(filter.isDescending ? sortDefinition.Descending(filter.SortColumn)
: sortDefinition.Ascending(filter.SortColumn));
}
public static Log ReadLatest(MongoConnection connection)
{
IMongoCollection <Log> logs = connection.Database.GetCollection <Log>(typeof(Log).Name);
SortDefinitionBuilder <Log> sortBuilder = new SortDefinitionBuilder <Log>();
SortDefinition <Log> sortDefinition = sortBuilder.Descending(log => log.CreatedTime);
IFindFluent <Log, Log> logFind = logs.Find(log => true).Sort(sortDefinition);
Task <Log> logTask = logFind.FirstAsync();
return(logTask.Result);
}
public async Task <List <Article> > GetHotArticles()
{
SortDefinitionBuilder <Article> builderSort = Builders <Article> .Sort;
var sort = builderSort.Descending("Meta.Views");
var options = new FindOptions <Article, Article>()
{
Sort = sort,
Limit = 10
};
var cursor = await this._collection.FindAsync(new BsonDocument(), options);
return(await cursor.ToListAsync());
}
private async Task <List <Article> > GetArticlesByfilter(FilterDefinition <Article> filter, int pageSize)
{
SortDefinitionBuilder <Article> builderSort = Builders <Article> .Sort;
var sort = builderSort.Descending("_id");
var options = new FindOptions <Article, Article>()
{
Sort = sort,
Limit = pageSize
};
var cursor = await this._collection.FindAsync(filter, options);
return(await cursor.ToListAsync());
}
public async Task <List <Comment> > GetCommentByPostId(string postId)
{
var filter = Builders <Comment> .Filter.Eq("PostId", postId);
SortDefinitionBuilder <Comment> builderSort = Builders <Comment> .Sort;
var sort = builderSort.Descending("_id");
var options = new FindOptions <Comment, Comment>()
{
Sort = sort,
};
var cursor = await this._collection.FindAsync(filter, options);
return(await cursor.ToListAsync());
}
/// <summary>
/// 根据条件，返回文档集合
/// </summary>
/// <typeparam name="TKey"></typeparam>
/// <param name="filter"></param>
/// <param name="orderByPropertyName"></param>
/// <param name="isDescending"></param>
/// <returns></returns>
public virtual async Task <List <T> > SelectAsync(FilterDefinition <T> filter, string orderByPropertyName, bool isDescending = true)
{
var fluent = Collection.Find(filter);
if (string.IsNullOrWhiteSpace(orderByPropertyName))
{
return(await fluent.ToListAsync());
}
var sortDefinitionBuilder = new SortDefinitionBuilder <T>();
var sort = isDescending ? sortDefinitionBuilder.Descending(orderByPropertyName) : sortDefinitionBuilder.Ascending(orderByPropertyName);
return(await fluent.Sort(sort).ToListAsync());
}
protected virtual async Task <IEnumerable <object> > GetCollection(Expression <Func <T, bool> > filter,
PagingSettings paging,
IEnumerable <SortingField> sortings,
Expression <Func <T, object> > projection,
CancellationToken token = default(CancellationToken))
{
if (!CollectionExist)
{
return(new List <object>());
}
try
{
var collection = filter == null?Collection.Find(_ => true) : Collection.Find(filter);
var sortingBuilder = new SortDefinitionBuilder <T>();
var sorts = new List <SortDefinition <T> >();
if (sortings != null)
{
sorts.AddRange(from sf in sortings
where !sf.IsNull
select sf.SortingMode == SortingModes.Ascending
? sortingBuilder.Ascending(sf.FieldName)
: sortingBuilder.Descending(sf.FieldName));
}
collection.Sort(sortingBuilder.Combine(sorts));
if (projection != null)
{
collection.Project(projection);
}
if (paging == null)
{
return((IEnumerable <object>) await collection.ToListAsync(CancellationToken.None));
}
if (paging.Skip != null)
{
collection = collection.Skip(paging.Skip);
}
if (paging.Limit != null)
{
collection = collection.Limit(paging.Limit);
}
return((IEnumerable <object>) await collection.ToListAsync(token));
}
catch (Exception e)
{
throw new Exception(e.Message);
}
}
public IPageList <T> Query <T>(FilterCondition filter) where T : IBaseObject
{
this.CheckType <T>();
IMongoCollection <T> collection = this.GetCollection <T>();
FilterDefinitionBuilder <T> filter2 = Builders <T> .Filter;
SortDefinitionBuilder <T> sort = Builders <T> .Sort;
FilterDefinition <T> filterDefinition = filter2.Empty;
foreach (FilterValue current in filter.Fields)
{
switch (current.FilterType)
{
case FilterType.LTE:
filterDefinition &= filter2.Lte <object>(current.FieldName, current.Value);
break;
case FilterType.GTE:
filterDefinition &= filter2.Gte <object>(current.FieldName, current.Value);
break;
case FilterType.LT:
filterDefinition &= filter2.Lt <object>(current.FieldName, current.Value);
break;
case FilterType.GT:
filterDefinition &= filter2.Gt <object>(current.FieldName, current.Value);
break;
case FilterType.EQ:
goto IL_12E;
case FilterType.Like:
filterDefinition &= filter2.Regex(current.FieldName, new Regex(current.Value.ToString(), RegexOptions.IgnoreCase));
break;
default:
goto IL_12E;
}
continue;
IL_12E:
filterDefinition &= filter2.Eq <object>(current.FieldName, current.Value);
}
Task <long> task = collection.CountAsync(filterDefinition, null, default(CancellationToken));
SortDefinition <T> sort2 = (filter.Direction == OrderDirection.DESC) ? sort.Descending(filter.OrderBy) : sort.Ascending(filter.OrderBy);
Task <List <T> > task2 = collection.Find(filterDefinition, null).Sort(sort2).Limit(new int?(filter.PageSize)).Skip(new int?((filter.PageIndex - 1) * filter.PageSize)).ToListAsync(default(CancellationToken));
return(new PageList <T>(task2.Result, filter.PageIndex, filter.PageSize, (int)task.Result));
}
public virtual async Task <IEnumerable <T> > GetAsync(
Expression <Func <T, bool> > filter,
PagingOptions pagingOptions,
IList <SortingOptions> sortingOptions,
CancellationToken token)
{
try
{
if (!this.IsCollectionsExists)
{
return(Enumerable.Empty <T>());
}
var sortDefinitionBuilder = new SortDefinitionBuilder <T>();
var sortDefinitions = new List <SortDefinition <T> >();
if (sortingOptions.Any())
{
sortDefinitions.AddRange(
sortingOptions.Select(
sortingOption => sortingOption.SortingMode == SortingMode.Ascending
? sortDefinitionBuilder.Ascending(sortingOption.FieldName)
: sortDefinitionBuilder.Descending(sortingOption.FieldName)));
}
var sourceCollection = filter == null?Collection.Find(_ => true) : Collection.Find(filter);
sourceCollection.Sort(sortDefinitionBuilder.Combine(sortDefinitions));
if (pagingOptions != null && pagingOptions.Skip != null)
{
sourceCollection = sourceCollection.Skip(pagingOptions.Skip);
}
if (pagingOptions != null && pagingOptions.Limit != null)
{
sourceCollection = sourceCollection.Limit(pagingOptions.Limit);
}
return(await sourceCollection.ToListAsync(token));
}
catch (Exception e)
{
Console.WriteLine(e);
throw;
}
}
/// <summary>
/// 初始化排序条件 主要当条件为空时 会默认以ObjectId递增的一个排序
/// </summary>
/// <param name="sortBy"></param>
/// <returns></returns>
private SortDefinition <BsonDocument> InitSortBy(string sortBy, params string[] fields)
{
SortDefinitionBuilder <BsonDocument> sortBuilder = Builders <BsonDocument> .Sort;
SortDefinition <BsonDocument> sortFilter = null;
if (sortBy == null)
{
//默认ObjectId 递增
sortFilter = Builders <BsonDocument> .Sort.Descending(OBJECTID_KEY); // new BsonDocument(OBJECTID_KEY, 1);
}
else
{
if (sortBy.ToLower() == "asc")
{
foreach (var item in fields)
{
if (sortFilter == null)
{
sortFilter = sortBuilder.Ascending(item);
}
else
{
sortFilter = sortFilter.Ascending(item);
}
}
}
else if (sortBy.ToLower() == "desc")
{
foreach (var item in fields)
{
if (sortFilter == null)
{
sortFilter = sortBuilder.Descending(item);
}
else
{
sortFilter = sortFilter.Descending(item);
}
}
}
else
{
sortFilter = sortFilter.Descending(OBJECTID_KEY);
}
}
return(sortFilter);
}
public Puzzle GetOneRandomly(List <int> excludedIds, string variant, int?userId, double nearRating = 1500)
{
FilterDefinitionBuilder <Puzzle> filterBuilder = Builders <Puzzle> .Filter;
FilterDefinition <Puzzle> filter = filterBuilder.Nin("_id", excludedIds) & filterBuilder.Eq("inReview", false)
& filterBuilder.Eq("approved", true);
if (variant != "Mixed")
{
filter &= filterBuilder.Eq("variant", variant);
}
if (userId.HasValue)
{
filter &= filterBuilder.Ne("author", userId.Value) & filterBuilder.Nin("reviewers", new int[] { userId.Value });
}
FilterDefinition <Puzzle> lteFilter = filter;
FilterDefinition <Puzzle> gtFilter = filter;
bool higherRated = RandomBoolean();
gtFilter &= filterBuilder.Gt("rating.value", nearRating);
lteFilter &= filterBuilder.Lte("rating.value", nearRating);
var foundGt = puzzleCollection.Find(gtFilter);
var foundLte = puzzleCollection.Find(lteFilter);
if (foundGt == null && foundLte == null)
{
return(null);
}
SortDefinitionBuilder <Puzzle> sortBuilder = Builders <Puzzle> .Sort;
foundGt = foundGt.Sort(sortBuilder.Ascending("rating.value")).Limit(1);
foundLte = foundLte.Sort(sortBuilder.Descending("rating.value")).Limit(1);
Puzzle oneGt = foundGt.FirstOrDefault();
Puzzle oneLte = foundLte.FirstOrDefault();
if (oneGt == null)
{
return(oneLte);
}
else if (oneLte == null)
{
return(oneGt);
}
else
{
return(RandomBoolean() ? oneGt : oneLte);
}
}
public SortDefinition <BsonDocument> GetSortDefinitionBySortFields(int metaObjectId, SortField[] sortFields)
{
var builder = new SortDefinitionBuilder <BsonDocument>();
if (sortFields == null || !sortFields.Any())
{
//默认给更新时间倒序排列
sortFields = new[] { new SortField {
Column = "ModifyTime", IsDesc = true
} };
}
//获取全部字段
var metaFieldDic = GetMetaFieldDicUnDeleted(metaObjectId);
SortDefinition <BsonDocument> sort = null;
foreach (var item in sortFields)
{
if (!metaFieldDic.ContainsKey(item.Column))
{
throw new ArgumentNullException(item.Column, $"field of {item.Column} is not exist in current MetaObject");
}
if (item.IsDesc)
{
if (sort == null)
{
sort = builder.Descending(item.Column);
}
else
{
sort = sort.Descending(item.Column);
}
}
else
{
if (sort == null)
{
sort = builder.Ascending(item.Column);
}
else
{
sort = sort.Ascending(item.Column);
}
}
}
return(sort);
}