在嘗試編寫一些乾淨的模型類庫時,我使用的是EF5 Code First。使用EntityTypeConfiguration將各種屬性映射到託管在SQL Server 2005服務器實例上的2個VIEWS列中。EF5代碼首先在DbSet查詢中執行意外的JOIN
注意:我知道有一些不良的表列命名正在進行,但由於它是現有的數據庫,因此我必須應對此問題。請原諒我。
做管道後,我可以查詢客戶賬戶...
var context = new Data.EntityContext();
public IQueryable<ClientAccount> GetClients(List<string> usernameOrEmail)
{
return context.ClientAccount.Where(p => usernameOrEmail.Contains(p.UserName) || usernameOrEmail.Contains(p.Email)).Include("Company").AsQueryable();
}
...匹配的客戶端返回,其中包括公司的詳細信息。
但是,當試圖僅獲取公司列表時,結果包含大量重複項。
var companies = data.Companies.Where(c => c.IsActive).OrderBy(c => c.Name);
使用SQL Server Profiler中我發現,對我的原因尚不清楚,發動機配備了一個LEFT OUTER JOIN,以包括客戶端的用戶id以及:
SELECT
[Extent1].[Id] AS [Id],
[Extent1].[Company] AS [Company],
[Extent1].[Address] AS [Address],
[Extent1].[AddressSuffix] AS [AddressSuffix],
[Extent1].[Zip] AS [Zip],
[Extent1].[City] AS [City],
[Extent1].[State] AS [State],
[Extent1].[CountryName] AS [CountryName],
[Extent1].[Telephone] AS [Telephone],
[Extent1].[Fax] AS [Fax],
[Extent1].[Url] AS [Url],
[Extent1].[Latitude] AS [Latitude],
[Extent1].[Longitude] AS [Longitude],
[Extent1].[isPublic] AS [isPublic],
[Extent1].[active] AS [active],
[Extent1].[parent] AS [parent],
[Extent2].[userId] AS [userId]
FROM [dbo].[VIEW_CompaniesCountryContinent] AS [Extent1]
LEFT OUTER JOIN [dbo].[PassportAccounts] AS [Extent2] ON ([Extent2].[companyId] IS NOT NULL) AND ([Extent1].[Id] = [Extent2].[companyId])
WHERE 1 = [Extent1].[active]
我不知道爲什麼,因爲我沒有鏈接到公司模式的客戶。 VIEW不包括用戶表,只針對公司表。
很明顯,我錯過了某些東西,我希望你能讓我回到正軌。 下面你會找到關於模型,上下文和實體規範的一些細節。 謝謝!
代碼信息:
的模式是相當簡單的...
public class ClientAccount : IUserAccount
{
public ClientAccount() { }
[Key]
public int ClientId { get; set; }
[DisplayName("User Name")]
public string UserName { get; set; }
[DisplayName("First Name")]
public string FirstName { get; set; }
[DisplayName("Last Name")]
public string LastName { get; set; }
[DisplayName("Job Title")]
public string JobTitle { get; set; }
[DisplayName("Company")]
public virtual Company Company { get; set; }
[DisplayName("Direct Phone")]
public string PhoneDirect { get; set; }
[DisplayName("Mobile phone")]
public string PhoneMobile { get; set; }
[DisplayName("Registration Date")]
public DateTime DateRegistered { get; set; }
[DisplayName("Last Login")]
public DateTime LastLogin { get; set; }
[EmailAddress]
[DisplayName("Email")]
public string Email { get;set; }
public bool IsApproved { get; set; }
public bool IsActive { get; set; }
public bool IsLockedOut { get { return !IsActive; } }
public bool IsOnline
{
get { return (LastLogin.AddMinutes(10) > DateTime.Now); }
}
public DateTime LastActivityAt { get; set; }
}
public class Company
{
[Key]
public int ID { get; set; }
public string Name { get; set; }
public string Address { get; set; }
public string Address2 { get; set; }
public string Zip { get; set; }
public string City { get; set; }
public string State { get; set; }
public string Country { get; set; }
public string Telephone { get; set; }
public string Fax { get; set; }
public string Url { get; set; }
public string TimeZone { get; set; }
public Coordinate Coordinate { get; set; }
public bool IsPublic { get; set; }
public bool IsActive { get; set; }
public int ParentCompanyId { get; set; }
}
public class Coordinate
{
public decimal? Latitude { get; set; }
public decimal? Longitude { get; set; }
}
到目前爲止,沒有什麼特別的(?右)。 的的DbContext:
public class EntityContext : DbContext
{
public EntityContext() : base("Name=EntityContext")
{
Database.SetInitializer<EntityContext>(null);
}
public EntityContext(string connectionString)
: base(connectionString)
{
Database.SetInitializer<EntityContext>(null);
}
public DbSet<ClientAccount> ClientAccount { get; set; }
public DbSet<Company> Companies { get; set; }
protected override void OnModelCreating(DbModelBuilder modelBuilder)
{
modelBuilder.Configurations.Add(new CompanyConfiguration());
modelBuilder.Configurations.Add(new ClientAccountConfiguration());
base.OnModelCreating(modelBuilder);
}
}
而且EntityTypeConfigurations ...
public class ClientAccountConfiguration : EntityTypeConfiguration<ClientAccount>
{
public ClientAccountConfiguration()
: base()
{
HasKey(p => p.ClientId);
ToTable("ClientAccounts"); // VIEW ClientAccounts
Property(p => p.ClientId)
.HasColumnName("userId")
.HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity)
.IsRequired();
Property(p => p.Email)
.HasColumnName("userEmail")
.IsRequired();
Property(p => p.UserName)
.HasColumnName("userLogin")
.IsRequired();
Property(p => p.FirstName).HasColumnName("userFirstName");
Property(p => p.LastName).HasColumnName("userLastName");
Property(p => p.PhoneDirect).HasColumnName("userPhoneDirect");
Property(p => p.PhoneMobile).HasColumnName("userPhoneMobile");
Property(p => p.JobTitle)
.HasColumnName("userPosition");
HasOptional(p => p.Company)
.WithOptionalDependent()
.Map(p => p.MapKey("companyId"));
Property(p => p.IsApproved).HasColumnName("Employed");
Property(p => p.IsActive).HasColumnName("active");
Property(p => p.LastActivityAt).HasColumnName("updated");
Property(p => p.LastLogin).HasColumnName("LastLogin").IsOptional();
Property(p => p.DateRegistered).HasColumnName("created");
}
}
public class CompanyConfiguration : EntityTypeConfiguration<Company>
{
public CompanyConfiguration()
{
this.HasKey(c => c.ID);
this.ToTable("VIEW_CompaniesCountryContinent");
this.Property(c => c.ID)
.HasColumnName("Id")
.HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);
this.Property(c => c.Name)
.HasColumnName("Company")
.IsRequired();
this.Property(c => c.Address).HasColumnName("Address");
this.Property(c => c.Address2).HasColumnName("AddressSuffix");
this.Property(c => c.Country).HasColumnName("CountryName");
this.Property(c => c.City).HasColumnName("City");
this.Property(c => c.Zip).HasColumnName("Zip");
this.Property(c => c.State).HasColumnName("State");
this.Property(c => c.Coordinate.Latitude).HasColumnName("Latitude");
this.Property(c => c.Coordinate.Longitude).HasColumnName("Longitude");
this.Property(c => c.TimeZone).HasColumnName("timezone");
this.Property(c => c.IsPublic).HasColumnName("isPublic");
this.Property(c => c.IsActive).HasColumnName("active");
this.Property(c => c.ParentCompanyId).HasColumnName("parent");
}
}
什麼是'data'在'data.Companies.Where'?只是上下文? –
順便說一句,在你給的sql中,你有'[Extent2]。[userId] AS [userId]'。它應該從哪裏來? 「var companies」是可查詢的嗎?如果是,那麼在哪裏以及如何使用? –
@Raphael:是的,數據是上下文 sql是通過使用Sql Profiler獲得的,並且由EntityFramework(而不是我)生成。 userId是困惑我,不知何故EF執行此JOIN,但我不明白爲什麼。這絕不是公司模式的一部分。 –