The following code work for me:
var query0 = DB.Plan
.Include("UserCreate")
.Include("UserUpdate")
.Include("PlanTemplate")
.Select(p => new
{
plan = p,
planItems = p.PlanItems.Where(pi => pi.IsCommited == true && pi.IsLocked == false)
});
var query2 = query0.AsEnumerable().Where(m => m.planItems.Count() > 0).Select(m => m.plan);
But the planItems related to another entities that I wanted,the following code do not work for me:
var query0 = DB.WorkEffortPlan
.Include("UserCreate")
.Include("UserUpdate")
.Include("PlanTemplate")
.Select(p => new
{
plan=p,
planItems = DB.PlanItem
.Include("UserResponsiblePerson")
.Include("TemplateItem")
.Include("ItemState")
.Where(pi => pi.PlanID == p.PlanID && pi.IsCommited == true && pi.IsLocked == false)
});
var query2 = query0.AsEnumerable().Where(m => m.planItems.Count() > 0).Select(m => m.plan);
The vs compiler is run OK,but when exec this code,I get the NullReferenceException in query0.
Is there any linq solution to get filtering children entity and his related entity?
Related
Hello I have an issue with this query
var queryGrouped = queryFiltered
.GroupBy(c => new { c.Id, c.TableOneId, c.TableOneName, c.TableTwoId, c.TableTwoName, c.TableTwoCode, c.TableThreeId, c.TableThreeName, c.Description, c.EffectiveDate, c.CreatedBy, c.ServiceGroupName })
.DisableGuard()
.Select(cg => new Model
{
Id = cg.Key.Id,
TableOneId = cg.Key.TableOneId,
TableOneName = cg.Key.TableOneName,
TableTwoId = cg.Key.TableTwoId,
TableTwoCode = cg.Key.TableTwoCode,
TableTwoName = cg.Key.TableTwoName,
TableThreeId = cg.Key.TableThreeId,
TableThreeName = cg.Key.TableThreeName,
Description = cg.Key.Description,
EffectiveDate = cg.Key.EffectiveDate,
EffectiveDateText = cg.Key.EffectiveDate != null ? cg.Key.EffectiveDate.Value.ToString("MM/dd/yyyy") : string.Empty,
ServiceGroupName = string.Join(", ", cg.Select(g => g.ServiceGroupName).Distinct()),
CreatedBy = cg.Key.CreatedBy
}).OrderBy(x => x.ServiceGroupName).ToListAsync();
If i run this when try to order by the field ServiceGroup it returns this message
LinqToDB.Linq.LinqException: ''Join(", ", cg.Select(g => g.ServiceGroupName).Distinct())' cannot be converted to SQL.'
So I don't know how to order by this field ServiceGroupName, thanks for any answer.
I would suggest to make grouping on the client side. Note that I have removed ServiceGroupName from grouping key.
var data = await queryFiltered
.Select(c => new {
c.Id,
c.TableOneId,
c.TableOneName,
c.TableTwoId,
c.TableTwoName,
c.TableTwoCode,
c.TableThreeId,
c.TableThreeName,
c.Description,
c.EffectiveDate,
c.CreatedBy,
c.ServiceGroupName
})
.ToListAsync();
var queryGrouped = data
.GroupBy(c => new { c.Id, c.TableOneId, c.TableOneName, c.TableTwoId, c.TableTwoName, c.TableTwoCode, c.TableThreeId, c.TableThreeName, c.Description, c.EffectiveDate, c.CreatedBy })
.Select(cg => new Model
{
Id = cg.Key.Id,
TableOneId = cg.Key.TableOneId,
TableOneName = cg.Key.TableOneName,
TableTwoId = cg.Key.TableTwoId,
TableTwoCode = cg.Key.TableTwoCode,
TableTwoName = cg.Key.TableTwoName,
TableThreeId = cg.Key.TableThreeId,
TableThreeName = cg.Key.TableThreeName,
Description = cg.Key.Description,
EffectiveDate = cg.Key.EffectiveDate,
EffectiveDateText = cg.Key.EffectiveDate != null ? cg.Key.EffectiveDate.Value.ToString("MM/dd/yyyy") : string.Empty,
ServiceGroupName = string.Join(", ", cg.Select(g => g.ServiceGroupName).Distinct()),
CreatedBy = cg.Key.CreatedBy
})
.OrderBy(x => x.ServiceGroupName)
.ToList();
I have flat collection of the following data (IQueryable<Article>) which was obtained by querying DB:
ArticleId
LanguageName
ArticleText
ExtraData1
ExtraData2
1
English
EngText1
Something1
Something2
1
English
EngText2
Another1
Another2
1
French
FraText1
Blabla1
2
English
EngText2
Ololo1
Blabla2
2
German
GerText1
Naturlisch2
Now I need to fill the IQueryable<AgregatedArticle>: the idea is grouping by ArticleId and putting repeating data into nested list:
public class AgregatedArticle {
public int ArticleId { get; set; }
public List<Data> ArticleTexts { get; set; }
public class Data {
public string LanguageName { get; set; }
public string ArticleText { get; set; }
}
}
Unfortunately, I cannot make it: I am getting various EfCore5 translation errors and don't know: if it's me or EfCore5 bugs or limitations. I wasted 3 days trying different approaches. Please help - I was unable to find suitable examples in Internet. The problem comes up when I try to fill ArticleTexts property.
Here is the simplified example:
private async Task<IQueryable<LawArticleAggregated>> GetLawArticlesGroupedById(DbSet<LawArticleDetail> dbSet, string userContentLangRestriction = null)
{
var dbContext = await GetDbContextAsync();
var articlesQuery =
(from articleIds in dbSet.Select(x => x.ArticleId).Distinct()
from articlesPerId in dbSet
.Where(x => x.ArticleId == articleIds.ArticleId)
join askedL in dbContext.Langs
.Where(l => l.LanguageCode == userContentLangRestriction)
on
articlesPerId.LanguageCode
equals
askedL.StringValue
into askedLanguages
from askedLawLanguage in askedLanguages.DefaultIfEmpty()
join fallbackL in dbContext.Langs
.Where(l => l.LanguageCode == CoreConstants.LanguageCodes.English)
on
articlesPerId.LanguageCode
equals
fallbackL.StringValue
into fallbackLanguages
from fallbackLanguage in fallbackLanguages.DefaultIfEmpty()
select new
{
ArticleId = articleIds.ArticleId,
ArticleText = articlesPerId.ArticleText,
LanguageName = askedLawLanguage.ShortName ?? fallbackLanguage.ShortName
})
.OrderBy(x => x.ArticleId).ThenBy(x => x.LanguageName).ThenBy(x => x.ArticleText);
await articlesQuery.LoadAsync();
var aggregatedArticleData = articlesQuery.Select(x => new
{
ArticleId = x.ArticleId,
ArticleText = x.ArticleText,
LanguageName = x.LanguageName
});
var aggregatedArticles = articlesQuery.Select(x => x.ArticleId).Distinct().Select(x => new ArticleAggregated
{
ArticleId = x.ArticleId,
ArticleTexts = aggregatedArticleData.Where(a => a.ArticleId == x.ArticleId)
.Select(x => new LawArticleAggregated.Data
{
ArticleText = x.ArticleText,
LanguageName = x.LanguageName
}).ToList()
});
return aggregatedArticles;
}
For this specific code the exception is as follows:
Unable to translate collection subquery in projection since the parent
query doesn't project key columns of all of it's tables which are
required to generate results on client side. This can happen when
trying to correlate on keyless entity or when using 'Distinct' or
'GroupBy' operations without projecting all of the key columns.
I think I have reverse engineered your query. Big difference that we cannot return IQueryable from this funcrtio, but prepared IEnumerable. So if you have pagination later, better to pass page info into function parameters.
private async Task<IEnumerable<LawArticleAggregated>> GetLawArticlesGroupedById(DbSet<LawArticleDetail> dbSet, string userContentLangRestriction = null)
{
var dbContext = await GetDbContextAsync();
var articlesQuery =
from article in dbSet
from askedLawLanguage in dbContext.Langs
.Where(askedLawLanguage => askedLawLanguage.LanguageCode == userContentLangRestriction && article.LanguageCode == askedLawLanguage.StringValue)
.DefaultIfEmpty()
from fallbackLanguage in dbContext.Langs
.Where(fallbackLanguage => fallbackLanguage.LanguageCode == CoreConstants.LanguageCodes.English && article.LanguageCode == fallbackLanguage.StringValue)
.DefaultIfEmpty()
select new
{
ArticleId = article.ArticleId,
ArticleText = article.ArticleText,
LanguageName = askedLawLanguage.ShortName ?? fallbackLanguage.ShortName
};
articlesQuery = articlesQuery
.OrderBy(x => x.ArticleId)
.ThenBy(x => x.LanguageName)
.ThenBy(x => x.ArticleText);
var loaded = await articlesQuery.ToListAsync();
// group on the client side
var aggregatedArticles = loaded.GroupBy(x => x.ArticleId)
.Select(g => new ArticleAggregated
{
ArticleId = g.Key,
ArticleTexts = g.Select(x => new LawArticleAggregated.Data
{
ArticleText = x.ArticleText,
LanguageName = x.LanguageName
}).ToList()
});
return aggregatedArticles;
}
I ended up with the following implementation (I show it "as is", without simplification from the first message to demonstrate the approach, slightly modified from the initial variant to use proper paging):
private async Task<IEnumerable<LawArticleAggregated>> GetLawArticlesGroupedByIdListAsync(
DbSet<LawArticleDetail> dbSet,
Expression<Func<IQueryable<LawArticleDetail>, IQueryable<LawArticleDetail>>> filterFunc,
int skipCount,
int maxResultCount,
string userContentLangRestriction = null,
CancellationToken cancellationToken = default
)
{
var dbContext = await GetDbContextAsync();
var articlesQuery =
(from articleIds in filterFunc.Compile().Invoke(dbSet).Select(x => new { x.TenantId, x.LawArticleId })
.Distinct().OrderBy(x => x.TenantId).OrderByDescending(x => x.LawArticleId).Skip(skipCount).Take(maxResultCount)
from articlesPerId in dbSet
.Where(x => x.TenantId == articleIds.TenantId && x.LawArticleId == articleIds.LawArticleId)
join askedL in dbContext.FixCodeValues
.Where(l =>
l.DomainId == CoreConstants.Domains.CENTRAL_TOOLS
&& l.CodeName == CoreConstants.FieldTypes.LANGUAGE
&& l.LanguageCode == userContentLangRestriction)
on
articlesPerId.LanguageCode
equals
askedL.StringValue
into askedLanguages
from askedLawLanguage in askedLanguages.DefaultIfEmpty()
join fallbackL in dbContext.FixCodeValues
.Where(l =>
l.DomainId == CoreConstants.Domains.CENTRAL_TOOLS
&& l.CodeName == CoreConstants.FieldTypes.LANGUAGE
&& l.LanguageCode == CoreConstants.LanguageCodes.English)
on
articlesPerId.LanguageCode
equals
fallbackL.StringValue
into fallbackLanguages
from fallbackLanguage in fallbackLanguages.DefaultIfEmpty()
select new
{
TenantId = articleIds.TenantId,
LawArticleId = articleIds.LawArticleId,
Shortcut = articlesPerId.Shortcut,
ArticleText = articlesPerId.ArticleText,
LanguageName = askedLawLanguage.ShortName ?? fallbackLanguage.ShortName
})
.OrderBy(x => x.TenantId).ThenByDescending(x => x.LawArticleId).ThenBy(x => x.Shortcut).ThenBy(x => x.LanguageName).ThenBy(x => x.ArticleText);
var articleList = await articlesQuery.ToListAsync(cancellationToken);
var aggregatedArticles = articleList.GroupBy(x => new { x.TenantId, x.LawArticleId })
.Select(g => new LawArticleAggregated
{
TenantId = g.Key.TenantId,
LawArticleId = g.Key.LawArticleId,
ArticleTexts = g.Select(x => new LawArticleAggregated.Data
{
Shortcut = x.Shortcut,
ArticleText = x.ArticleText,
LanguageName = x.LanguageName
}).ToList()
});
return aggregatedArticles;
}
private async Task<long> GetLawArticlesGroupedByIdCountAsync(
DbSet<LawArticleDetail> dbSet,
Expression<Func<IQueryable<LawArticleDetail>, IQueryable<LawArticleDetail>>> filterFunc,
CancellationToken cancellationToken = default
)
{
return await filterFunc.Compile().Invoke(dbSet).GroupBy(x => new { x.TenantId, x.LawArticleId }).LongCountAsync(cancellationToken);
}
I cannot get the following to work properly. I want to search my database using more than 2 conditions where it will be possible to search only on one, two or all three, thus narrowing the search. At the moment, I can only get it to work with one condition at a time, and it only evaluates the first condition when having more than 3.
How can I Include more than 2 conditions? I have tried several proposed solutions from other sources, that uses if statements and where clauses, but so far none of them have worked.
This is my controller
public IActionResult Index(string searchString, int searchProject, string searchTitel)
{
var Projektdokumenter = from p in _context.ProjekterDokutypeDokuundertype
.Include(p => p.Dokumenttype)
.Include(p => p.Dokuundertype)
.Include(p => p.Forfatter)
.Include(p => p.P)
.Include(p => p.Sprog)
select p;
if (!String.IsNullOrEmpty(searchString) ^ searchProject != null ^ !String.IsNullOrEmpty(searchTitel))
{
if (!String.IsNullOrEmpty(searchString))
{
var c = Projektdokumenter.Where(p => p.Forfatter.Initialer.Contains(searchString)).ToList();
return View(c);
}
{
if (searchProject != 0)
{
var d = Projektdokumenter.Where(p => p.P.ProjektId.Equals(searchProject)).ToList();
return View(d);
}
{
if(!String.IsNullOrEmpty(searchTitel))
{
var f = Projektdokumenter.Where(p => p.Titel.Contains(searchTitel)).ToList();
return View(f);
}
}
}
}
var e = Projektdokumenter.Where(c.Contains(searchString) && p.P.ProjektId.Equals(searchProject) && p.Titel.Contains(searchTitel)).ToList();
return View(e);
}
IQueryable can be combined, so just write in native way:
{
var query = _context.ProjekterDokutypeDokuundertype
.Include(p => p.Dokumenttype)
.Include(p => p.Dokuundertype)
.Include(p => p.Forfatter)
.Include(p => p.P)
.Include(p => p.Sprog)
.AsQueryable();
if (!string.IsNullOrEmpty(searchString))
{
query = query.Where(p => p.Forfatter.Initialer.Contains(searchString));
}
if (searchProject != 0)
{
query = query.Where(p => p.P.ProjektId == searchProject);
}
if (!string.IsNullOrEmpty(searchTitel))
{
query = query.Where(p => p.Titel.Contains(searchTitel))
}
return View(query.ToList());
}
Good day:
I'm trying to achieve a dynamic Bool Query. Example...
QueryContainer addressQuery = null;
QueryContainer typeQuery = null;
BoolQueryDescriptor <Facility> boolQuery = new BoolQueryDescriptor<Facility>();
QueryContainerDescriptor<Facility> sh = new QueryContainerDescriptor<Facility>();
SearchDescriptor<Facility> mainSh = new SearchDescriptor<Facility>();
if (search.searchTerm != null)
{
addressQuery = sh.Term(f => f.Address, search.searchTerm) ||
sh.Match(m => m.Field(f => f.Address).Query(search.searchTerm) ) ||
sh.Term(f => f.ZipCode, search.searchTerm) ||
sh.Match(m => m.Field(f => f.State).Query(search.searchTerm));
boolQuery = boolQuery.Should(b => addressQuery);
}
if (search.type != null) {
typeQuery = sh.Term(f => f.Types.First(), search.type);
boolQuery = boolQuery.Must(b => typeQuery && addressQuery);
}
if (boolQuery != null)
{
mainSh = mainSh.Query(q => q.Bool(b => boolQuery));
request = await this._elasticClient.SearchAsync<Facility>(s => mainSh.Size(search.size));
}
This query is turning into a OR between AddressQuery and TypeQuery however, I'd like to achieve an And condition between both query. Effectively making the query dynamic. Is this possible? Example: dynamic addressQuery && typeQuery.
Thanks.
Fire it out..you can && or || query containers...sorter like:
queryContainer1=queryContainer1 && queryContainer2
Then .bool(b => b(queryContainer1)).
Can someone refactor my code in a simpliest way?
var yearly = context.Prospects.Join(context.Prospect_Details, prospect => prospect.ProspectId,
prosDetail => prosDetail.ProspectID,
(prospect, prosDetail) => new {Prospect = prospect, ProspectDetail = prosDetail})
.Join(context.Sources, prospect => prospect.Prospect.SourceId, source => source.SourceId, (prospect, source) => new {Prospect = prospect, Source = source})
.Where(
c =>
c.Prospect.Prospect.Customer.StoreId == storeid && c.Prospect.ProspectDetail.IsDeleted == false
&& c.Prospect.ProspectDetail.DateCreated.Year == date.Year && c.Prospect.Prospect.Customer.IsMerge == null
&& c.Prospect.Prospect.SubStatus.Status.Name == "Sold").ToList();
var daily = context.Prospects.Join(context.Prospect_Details, prospect => prospect.ProspectId,
prosDetail => prosDetail.ProspectID,
(prospect, prosDetail) => new { Prospect = prospect, ProspectDetail = prosDetail })
.Join(context.Sources, prospect => prospect.Prospect.SourceId, source => source.SourceId, (prospect, source) => new { Prospect = prospect, Source = source })
.Where(
c =>
c.Prospect.Prospect.Customer.StoreId == storeid && c.Prospect.ProspectDetail.IsDeleted == false
&& c.Prospect.ProspectDetail.DateCreated.Year == date.Year && c.Prospect.ProspectDetail.DateCreated.Month == date.Month
&& c.Prospect.ProspectDetail.DateCreated.Day == date.Day && c.Prospect.Prospect.Customer.IsMerge == null
&& c.Prospect.Prospect.SubStatus.Status.Name == "Sold").ToList();
i need to know if there's a simplest way, im newbie in linq-sql.