Query Code:
var query = session.IndexQuery<App_OrgSearch.IndexResult, App_OrgSearch>();
var organizationUnitResults = query.Statistics(out stats)
.Skip(0)
.Take(5)
.AsProjection<Org>().ToList();
public static IRavenQueryable<TResult> IndexQuery<TResult, TIndex>(this IDocumentSession session)
where TIndex : AbstractIndexCreationTask, new()
{
return session.Query<TResult, TIndex>();
}
App_OrgSearch is the index I defined as below:
public class App_OrgSearch : AbstractIndexCreationTask<Org, App_OrgSearch.IndexResult>
{
public class IndexResult
{
public string Id { get; set; }
public string BusinessName { get; set; }
public string ShortName { get; set; }
public IList<string> Names { get; set; }
public List<string> PhoneNumbers { get; set; }
public List<OrganizationUnitPhone> OrganizationUnitPhones { get; set; }
}
public App_OrganizationUnitSearch()
{
Map = docs => from doc in docs
select new
{
Id = doc.Id,
Names = new List<string>
{
doc.BusinessName,
doc.ShortName,
},
BusinessName = doc.BusinessName,
ShortName = doc.ShortName,
PhoneNumbers = doc.OrganizationUnitPhones.Where(x => x != null && x.Phone != null).Select(x => x.Phone.Number),
};
Indexes.Add(x => x.Names, FieldIndexing.Analyzed);
}
}
I have 27 records in database. I want to take 5, but after query, all 27 records are returned. Why does Take function not work?
Your sample code seems wrong.
var query = session.IndexQuery<App_OrgSearch.IndexResult, App_OrgSearch>();
var organizationUnitResults = organizationUnitsQuery.Statistics(out stats)
What is organizationUnitsQuery ? You have the query as query, but there is no IndexQuery method on the session
Related
There are a lot of examples how to use Fluent API in the internet, but mostly shows how configure one relationship between two models. In my case I need 3 relationships between 2 models. How to configure relationships between models below with Fluent API?
public class Company
{
public int Id { get; set; }
public string Name { get; set; }
public int FinanceEstimateId { get; set; }
public Estimate FinanceEstimate { get; set; }
public int EnvironmentEstimateId { get; set; }
public Estimate EnvironmentEstimate { get; set; }
public int SelfEstimateId { get; set; }
public Estimate SelfEstimate { get; set; }
}
public class Estimate
{
public int Id { get; set; }
public string Name { get; set; } // like: bad, good, excellent
public float Value { get; set; } // like: 1,2,3
}
Maybe this points you in the right direction.
I would go for 2 configurations like:
public class CompanyConfiguration : IEntityTypeConfiguration<Company>
{
public void Configure(EntityTypeBuilder<Company> builder)
{
builder.ToTable("Companies");
builder
.HasOne(x => x.EnvironmentEstimate)
.WithMany()
.HasForeignKey(x => x.EnvironmentEstimateId)
.OnDelete(DeleteBehavior.NoAction);
builder
.HasOne(x => x.FinanceEstimate)
.WithMany()
.HasForeignKey(x => x.FinanceEstimateId)
.OnDelete(DeleteBehavior.NoAction);
builder
.HasOne(x => x.SelfEstimate)
.WithMany()
.HasForeignKey(x => x.SelfEstimateId)
.OnDelete(DeleteBehavior.NoAction);
}
}
public class EstimateConfiguration : IEntityTypeConfiguration<Estimate>
{
public void Configure(EntityTypeBuilder<Estimate> builder)
{
builder.ToTable("Estimates");
}
}
You need a DbContext:
public class MyDbContext : DbContext
{
public DbSet<Company> Companies { get; set; } = null!;
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
optionsBuilder.UseSqlServer(#"CONNECTIONSTRING");
}
protected override void OnModelCreating(ModelBuilder modelBuilder)
{
base.OnModelCreating(modelBuilder);
// applies the configuration (those IEntityTypeConfiguration<T> things)
modelBuilder.ApplyConfigurationsFromAssembly(typeof(MyDbContext).Assembly);
}
}
I created a console application that demonstrates the usage
using var ctx = new MyDbContext();
await ctx.Database.EnsureDeletedAsync();
await ctx.Database.EnsureCreatedAsync();
var company1 = new Company
{
Name = "Name1",
EnvironmentEstimate = new Estimate { Name = "EnvironmentEstimate1", Value = 1 },
FinanceEstimate = new Estimate { Name = "FinanceEstimate1", Value = 2 },
SelfEstimate = new Estimate { Name = "SelfEstimate1", Value = 3 }
};
var company2 = new Company
{
Name = "Name2",
EnvironmentEstimate = new Estimate { Name = "EnvironmentEstimate2", Value = 4 },
FinanceEstimate = new Estimate { Name = "FinanceEstimate2", Value = 5 },
SelfEstimate = new Estimate { Name = "SelfEstimate2", Value = 6 }
};
await ctx.Companies.AddAsync(company1);
await ctx.Companies.AddAsync(company2);
await ctx.SaveChangesAsync();
var result = await ctx.Companies.ToListAsync();
Console.WriteLine("Done");
Hello I have problem in one query. Why it's always return no value.
public List<UserDetail> userSearchModel(UserSearchModel searchModel)
{
string userid = User.Identity.GetUserId();
var user = _dbContext.UserDetails.Where(x => x.Id == userid);
var result = _dbContext.UserDetails.Except(user).ToList().AsQueryable();
if (searchModel != null)
{
if (searchModel.LanguageId.Count() != 0)
{
List<UserDetailLanguage> usrDetails = new List<UserDetailLanguage>();
foreach (var item in searchModel.LanguageId)
{
var details = _dbContext.UserDetailLanguages.Where(x => x.LanguageId == item).ToList();
foreach (var item2 in details)
{
usrDetails.Add(item2);
}
}
result = result.Where(x => x.UserDetailLanguages == usrDetails);
}
}
return result.ToList();
}
I want to get results which are the same in usrDetails list and in result.UserDetailLanguages.
In result.UserDetailLanguages I have record equals to record in usrDetails but this not want retrieve.
Here is my model:
public class UserDetail
{
public UserDetail()
{
this.UserDetailLanguages = new HashSet<UserDetailLanguage>();
}
[Key, ForeignKey("User")]
public string Id { get; set; }
public DateTime Birthday { get; set; }
public string Sex { get; set; }
public string Country { get; set; }
public string About { get; set; }
[NotMapped]
public int Age { get { return DateTime.Now.Year - Birthday.Year; } }
public virtual ApplicationUser User { get; set; }
public virtual ICollection<UserDetailLanguage> UserDetailLanguages { get; set; }
}
public class UserDetailLanguage
{
public Int32 Id { get; set; }
public virtual UserDetail UserDetail { get; set; }
public string UserDetailId { get; set; }
public virtual Language Language { get; set; }
public Int32 LanguageId { get; set; }
public Boolean IsKnown { get; set; }
public static implicit operator List<object>(UserDetailLanguage v)
{
throw new NotImplementedException();
}
}
public class Language
{
public Language()
{
this.UserDetailLanguages = new HashSet<UserDetailLanguage>();
}
public int Id { get; set; }
public string Value { get; set; }
public string Name { get; set; }
public virtual ICollection<UserDetailLanguage> UserDetailLanguages { get; set; }
}
What I'm doing wrong?
If you want to see if your value is in a list you use the Contains function of the list -- like this:
result = result.Where(x => usrDetails.Contains(x.UserDetailLanguage));
If you want to see if there are any items in both lists you can use intersection like this:
result = result.Where(x => usrDetails.Intersect(x.UserDetailLanguage).Count() > 0);
Looks like you are checking equality between lists in following code
result = result.Where(x => x.UserDetailLanguages == usrDetails);
This might not work, to check equality for lists you can use something like
Enumerable.SequenceEqual(FirstList.OrderBy(fList => fList),
SecondList.OrderBy(sList => sList))
Assuming the following class:
public class Thing
{
public string Id { get; set; }
public string Title{ get; set; }
public string KeyId { get; set; }
public CultureInfo Culture { get; set; }
}
and the following result class:
public class ProjectedThing
{
public string Id { get; set; }
public string Title{ get; set; }
public string KeyId { get; set; }
public CultureInfo Culture { get; set; }
public IEnumerable<Thing> Things { get; set; }
}
How can I build an index that holds the result class?
The closest I've come is with the following index definition:
public class ProjectedThings : AbstractIndexCreationTask<Thing,ProjectedThing>
{
public ProjectedThings()
{
Map = docs => from doc in docs
select new
{
Title = doc.Title,
KeyId = doc.KeyId,
Culture = doc.Culture,
Things = new[] {
new Thing{
Id = doc.Id,
Title = doc.Title,
KeyId = doc.KeyId,
Culture = doc.Culture,
TitlePluralized = doc.TitlePluralized
}
}
};
Reduce = results => from r in results
group r by r.KeyId into g
select new
{
Title = g.FirstOrDefault(x => x.Id == x.KeyId).Title,
KeyId = g.Key,
Culture = g.FirstOrDefault(x => x.Id == x.KeyId).Culture,
Things = from thing in g.SelectMany(x => x.Things).Where(x => x.Id != x.KeyId)
select new
{
Id = thing.Id,
Title = thing.Title,
KeyId = thing.Key,
Culture = thing.Culture
}
};
}
}
That's almost doing the trick, but I can't collect the Title, KeyId, and Culture in the reduction. Only the Things property is being populated.
Look at your code:
g.FirstOrDefault(x => x.Id == x.KeyId)
I don't understand this, but this is likely to be always false.
You probably want:
g.FirstOrDefault().Title,
I'm trying to define an index in RavenDb that uses the output of another index as it's input but I can't get it to work.
I have the following entities & indexes defined.
SquadIndex produces the result I expect it to do but SquadSizeIndex doesn't even seem to execute.
Have I done something wrong or is this not supported?
class Country
{
public string Id { get; private set; }
public string Name { get; set; }
}
class Player
{
public string Id { get; private set; }
public string Name { get; set; }
public string CountryId { get; set; }
}
class Reference
{
public string Id { get; set; }
public string Name { get; set; }
}
class SquadIndex : AbstractIndexCreationTask<Player, SquadIndex.Result>
{
public SquadIndex()
{
Map = players => from player in players
let country = LoadDocument<Country>(player.CountryId)
select new Result
{
Country = new Reference
{
Id = country.Id,
Name = country.Name
},
Players = new[]
{
new Reference
{
Id = player.Id,
Name = player.Name
}
}
};
Reduce = results => from result in results
group result by result.Country
into g
select new Result
{
Country = g.Key,
Players = g.SelectMany(x => x.Players)
};
}
internal class Result
{
public Reference Country { get; set; }
public IEnumerable<Reference> Players { get; set; }
}
}
class SquadSizeIndex : AbstractIndexCreationTask<SquadIndex.Result, SquadSizeIndex.Result>
{
public SquadSizeIndex()
{
Map = squads => from squad in squads
select new Result
{
Country = squad.Country,
PlayerCount = squad.Players.Count()
};
Reduce = results => from result in results
group result by result.Country
into g
select new Result
{
Country = g.Key,
PlayerCount = g.Sum(x => x.PlayerCount)
};
}
internal class Result
{
public Reference Country { get; set; }
public int PlayerCount { get; set; }
}
}
No, you can't. The output of indexes are not documents to be indexed.
You can use the scripted index results to chain indexes, but that isn't trivial.
The ManagingAgent child property on the Complex entity is not being loaded with data.... possibly the result of too much mulled wine.
I have logged the SQL on the database calls and the SQL is returning the correct data.
LazyLoading is disabled.
public ApplicationDbContext()
: base("DefaultConnection")
{
this.Configuration.LazyLoadingEnabled = false;
}
Aggregate Root
public class Complex
{
public Complex()
{
Forums = new List<Forum>();
ManagingAgent = new ManagingAgent();
}
[Key]
public int ComplexId { get; set; }
[Required]
public string Name { get; set; }
public string Address1 { get; set; }
public string Address2 { get; set; }
public string Address3 { get; set; }
public int? PostCodeId { get; set; }
public PostCode PostCode { get; set; }
public int? LocationId { get; set; }
public Location Location { get; set; }
public int? CountyId { get; set; }
public County County { get; set; }
public int? ManagingAgentId { get; set; }
public ManagingAgent ManagingAgent { get; set; }
public int? CountOfUnits { get; set; }
public List<Forum> Forums { get; set; }
}
Attempt 1. using Include...
public List<Complex> GetComplexesByUserId(Guid userId)
{
using (var db = new ApplicationDbContext())
{
db.Database.Log = Logger;
var complexIds = db.UserApartments.Where(r => r.UserId == userId)
.Select(c => c.ComplexId).ToList();
return db.Complexes.Where(c => complexIds.Contains(c.ComplexId))
.Include(m => m.ManagingAgent).ToList();
}
}
Attempt 2 - explicitly loading ..same result (SQL returns data correctly but ManagingAgent isn't populated)
public List<Complex> GetComplexesByUserId(Guid userId)
{
using (var db = new ApplicationDbContext())
{
db.Database.Log = Logger;
var complexIds = db.UserApartments.Where(r => r.UserId == userId)
.Select(c => c.ComplexId).ToList();
var list = new List<Complex>();
foreach (var id in complexIds)
{
var complex = db.Complexes.Find(id);
db.Entry(complex).Reference(m => m.ManagingAgent).Load();
list.Add(complex);
}
return list;
}
}
So, to force the load I am doing this.... not good..
foreach (var id in complexIds)
{
var complex = db.Complexes.Find(id);
var managingAgent = db.ManagingAgents.Find(complex.ManagingAgentId);
complex.ManagingAgent = managingAgent;
list.Add(complex);
}
Remove this line...
ManagingAgent = new ManagingAgent();
...from the constructor of the Complex entity. Then it will work. (Generally don't instantiate reference navigation properties in an entity default constructor. EF calls this constructor via reflection when it materializes the entity and "gets confused" if the navigation property already has a reference. I can't explain the "gets confused" better since I don't know the exact mechanism of object materialization with related entities, but the effect is that the loaded child column values are ignored because there is already an instantiated child entity, but just with the useless default values from the ManagingAgent constructor.)