following is the code to group quarterly records and it's throwing an error - OracleException: ORA-00932: inconsistent datatypes: expected NCHAR got NCLOB
var result = recordsQuery
.GroupBy(p => (((DateTime)p.PROCESS_STRT_TIME).Month - 1) / 3 + ", " + ((DateTime)p.PROCESS_STRT_TIME).Year)
.Select(g => new QuarterlyData
{
Quarter = g.Key,
SucccessCount = g.Count(),
})
.ToList();
Try the following query, also corrected Quarter calculation.
var result = recordsQuery
.GroupBy(p => new { Year = p.PROCESS_STRT_TIME.Value.Year, Quarter = (p.PROCESS_STRT_TIME.Value.Month - 1) / 4 + 1 })
.Select(g => new QuarterlyData
{
Quarter = g.Key.Querter.ToString() + ", " + g.Key.Year.ToString(),
SucccessCount = g.Count(),
})
.ToList();
Related
I would like to generate this SQL query in entity framework
SELECT FunctionalAssets.Name, FunctionalAssetStructurePath.Path
FROM FunctionalAssets
LEFT JOIN FunctionalAssetStructurePath ON FunctionalAssets.Id =
FunctionalAssetStructurePath.FunctionalAssetId AND
FunctionalAssetStructurePath.StructureConfigurationId = 'A8A41B14-0A35-45D3-2A2B-08D904A3CD0B'
ORDER BY FunctionalAssetStructurePath.Path, FunctionalAssets.Name
OFFSET 0 ROWS FETCH NEXT 100 ROWS ONLY
I try with this code (but I know that it won't work)
var result = context.FunctionalAssets
.Include(x => x.FunctionalAssetsStructurePaths.Any(y => y.StructureConfigurationId == configurationId))
.OrderBy(x => x.FunctionalAssetsStructurePaths.Select(y => y.Path))
.ThenBy(x => x.Name)
.Skip(0)
.Take(100)
.AsNoTracking()
.Select(x => x.Name)
.ToList();
Have you an idea how to do this ?
Thank you
I found a solution.
var result = context.FunctionalAssets
.GroupJoin(context.FunctionalAssetStructurePathModel.Where(y => y.StructureConfigurationId == 'A8A41B14-0A35-45D3-2A2B-08D904A3CD0B'),
fa => fa.Id,
fasp => fasp.FunctionalAssetId,
(fa, fasp) => new { fa, fasp })
.SelectMany(x => x.fasp.DefaultIfEmpty(), (x, p) => new { x.fa, p.Path })
.OrderBy(x => x.Path)
.Skip(0)
.Take(100)
.ToList();
And the generated SQL query is :
SELECT [f].[Id], [f].[Name], [t].[Path]
FROM [FunctionalAssets] AS [f]
LEFT JOIN (
SELECT [f0].[FunctionalAssetId], [f0].[Path]
FROM [FunctionalAssetStructurePath] AS [f0]
WHERE [f0].[StructureConfigurationId] = 'A8A41B14-0A35-45D3-2A2B-08D904A3CD0B'
) AS [t] ON [f].[Id] = [t].[FunctionalAssetId]
ORDER BY [t].[Path]
OFFSET 0 ROWS FETCH NEXT 100 ROWS ONLY
I have a problem: I have this table
ID
Title
GenreID
Genre
Duration
1
Movie1
1,2
Cartoon, Family
80
2
Movie2
3,4
Horror, Drama
76
3
Movie3
4
Drama
110
4
Movie4
1,2
Cartoon, Family
200
I need to filter by Genre, I make my query in this way, For example if I want all movies with Genre Cartoon (2), I make:
request.genre = 2
var query1 = from q in Movies
select new Response.MovieResponse
{
MovieId = q.MovieId,
Name = q.Title,
Genres = q.Genre,
GenreIds = q.GenreID
};
if (request != null)
{
if (!string.IsNullOrEmpty(request.Title))
query1 = query1.Where(co => co.Name.StartsWith(request.name));
if (!string.IsNullOrEmpty(request.genre))
if (int.Parse(request.genre) > 0)
{
query1.AsEnumerable().Where(ca =>
request.genre .Any(x => ca.GenreIds.Contains(x)));
}
}
List<Response.StoreResponse> stores = new List<Response.StoreResponse>();
stores = await query1.ToListAsync();
I expected 2 records inside but the filter on genre does not work. I always have back all movies. The filter by title run
I tried
if (!string.IsNullOrEmpty(request.category))
if (int.Parse(request.category) > 0)
{
string[] cat = { request.category };
var q1 = query1.Where(ca => ca.CategoriesIds.Contains(cat.ToString()));
l = q1.ToList();
}
but I have error:
The LINQ expression 'DbSet<Store>()
.Join(
inner: DbSet<Country>(),
outerKeySelector: s => s.CountryId,
innerKeySelector: c => (Nullable<int>)c.CountryId,
resultSelector: (s, c) => new TransparentIdentifier<Store, Country>(
Outer = s,
Inner = c
))
.Join(
inner: DbSet<City>(),
outerKeySelector: ti => ti.Outer.CityId,
innerKeySelector: c0 => (Nullable<long>)c0.CityId,
resultSelector: (ti, c0) => new TransparentIdentifier<TransparentIdentifier<Store, Country>, City>(
Outer = ti,
Inner = c0
))
.Where(ti0 => ti0.Outer.Outer.StatusId == (Nullable<int>)2)
.Where(ti0 => DbSet<Operator>()
.Where(o => EF.Property<Nullable<Guid>>(ti0.Outer.Outer, "StoreId") != null && object.Equals(
objA: (object)EF.Property<Nullable<Guid>>(ti0.Outer.Outer, "StoreId"),
objB: (object)EF.Property<Nullable<Guid>>(o, "StoreId")))
.Count() > 0)
.Where(ti0 => string.Join<long>(
separator: ",",
values: DbSet<StoresCategory>()
.Where(s0 => EF.Property<Nullable<Guid>>(ti0.Outer.Outer, "StoreId") != null && object.Equals(
objA: (object)EF.Property<Nullable<Guid>>(ti0.Outer.Outer, "StoreId"),
objB: (object)EF.Property<Nullable<Guid>>(s0, "StoreId")))
.Select(s0 => s0.CategoryId)
.ToList()).Contains(__ToString_0))' could not be translated. Either rewrite the query in a form that can be translated, or switch to client evaluation explicitly by inserting a call to 'AsEnumerable', 'AsAsyncEnumerable', 'ToList', or 'ToListAsync'. See https://go.microsoft.com/fwlink/?linkid=2101038 for more information.
I am trying to create search filter with a lot of options (string input, select input ...). I need to filter tags by category if categoryId more than 0, if categoryId equals 0 return all tags with all related categories (or don't apply category option for searching). But my code doesn't return any categories in both cases, and doesn't give me any mistakes. A lot of examples in the internet that I found shows how work just one string input.
IQueryable<Tag> tags = _context.Tag
.Where(s => EF.Functions.Like(s.Name, "%" + name + "%"))
.Where(s => EF.Functions.Like(s.Description, "%" + description + "%"))
.Include(s => s.Value)
.Include(s => s.Period);
if (categoryId > 0)
{
tags.Include(s => s.Category).Where(s => s.Category.CategoryId == categoryId);
}
else
{
tags.Include(s => s.Category);
}
Could anyone explain why my code doesn't work? And how to implement this functionality? Thanks.
Right code is:
IQueryable<Tag> tags = _context.Tag
.Where(s => EF.Functions.Like(s.Name, "%" + name + "%"))
.Where(s => EF.Functions.Like(s.Description, "%" + description + "%"))
.Include(s => s.Value)
.Include(s => s.Period);
if (categoryId > 0)
{
tags = tags.Include(s => s.Category).Where(s => s.Category.CategoryId == categoryId);
}
else
{
tags = tags.Include(s => s.Category);
}
If possible, please guide me how to convert my SQL command to lambda expression
select d.* from takcontractdet d where d.contractid=pubcontractid and d.personid in
(
select p.id from personel p where p.parentid=pubparentid)
)
Two query
var personelIds = Personels.Where(p => p.ParentId == pubparentid)
.Select(e => e.Id).ToList();
var result = Takcontractdets.Where(d => d.contractid == pubcontractid &&
personelIds.Contains(d.PersonId)).ToList();
One query
var result = Takcontractdets.Where(d => d.contractid == pubcontractid &&
Personels.Where(p => p.ParentId == pubparentid)
.Select(e => e.Id).ToList().Contains(d.PersonId))
.ToList();
I am facing this linq query for entity framework core (2.0).
var result = await dbContext.Table1DbSet
.Where(t1e => t1e.Id == id && t1e.Id2 == id2)
.Select
(
t1e =>
t1e.Table2NavPropICollection.Select
(
t2e => new
{
singleObject = t2e.Table3NavPropObject.TargetObject,
enumerable1 = t2e.Table3NavPropObject.Table4NavPropObject.Table5NavPropICollection.Select(t5e => t5e.TargetObject),
enumerable2 = t2e.Table3NavPropObject.Table6NavPropObject.Table7NavPropICollection.Select(t7e => t7e.TargetObject),
enumerable3 = t2e.Table3NavPropObject.Table8NavPropICollection.SelectMany(t8e => t8e.Table9NavPropICollection.Select(t9e => t9e.TargetObject))
}
)
)
.ToListAsync();
The goal is to query all the referenced instances of TargetObject which is referenced accros ~ 10 different tables.
Currently it returns an IEnumerable where the anonymous object contains the properties singleObject, enumerable1, enumerable2, enumerable3. All those properties are of type TargetObject or IEnumerable.
Can I, and how, rewrite the query to not return anonymous objects but just an IEnumerable containing all the values?
For some reason the compiler won't let me iterate over the anonymous collection and flatten it manually.
This should do the trick if you want one array per t1e row.
var result = await dbContext.Table1DbSet
.Where(t1e => t1e.Id == id && t1e.Id2 == id2)
.Select
(
t1e =>
t1e.Table2NavPropICollection.Select
(
t2e => new[] {t2e.Table3NavPropObject.TargetObject}.Concat(
t2e.Table3NavPropObject.Table4NavPropObject.Table5NavPropICollection.Select(t5e => t5e.TargetObject)).Concat(
t2e.Table3NavPropObject.Table6NavPropObject.Table7NavPropICollection.Select(t7e => t7e.TargetObject)).Concat(
t2e.Table3NavPropObject.Table8NavPropICollection.SelectMany(t8e => t8e.Table9NavPropICollection.Select(t9e => t9e.TargetObject)))
)
)
.ToListAsync();
If you want it completely flat, you'll want to switch that Select to a SelectMany().
var result = await dbContext.Table1DbSet
.Where(t1e => t1e.Id == id && t1e.Id2 == id2)
.SelectMany
(
t1e =>
t1e.Table2NavPropICollection.Select
(
t2e => new[] {t2e.Table3NavPropObject.TargetObject}.Concat(
t2e.Table3NavPropObject.Table4NavPropObject.Table5NavPropICollection.Select(t5e => t5e.TargetObject)).Concat(
t2e.Table3NavPropObject.Table6NavPropObject.Table7NavPropICollection.Select(t7e => t7e.TargetObject)).Concat(
t2e.Table3NavPropObject.Table8NavPropICollection.SelectMany(t8e => t8e.Table9NavPropICollection.Select(t9e => t9e.TargetObject)))
)
)
.ToListAsync();
Is Add and/or Concat a possible solution?
PoC:
var a = new [] { 1,2,3 };
var result = new {
firstA = a.First(),
otherAs = a,
backwards = a.Reverse()
};
var final = new List<int>();
final.Add(result.firstA);
final.Concat(result.otherAs.Concat(result.backwards))
.Dump();