我按照this文档来使用我项目中的空间数据。
我已经使用Stack Builder安装了postgis扩展,我创建了模型,迁移,我已经应用了它,一切都很好。
问题是当我执行项目时。第一次需要数据库时,我得到了这个例外:
System.InvalidOperationException
HResult=0x80131509
Message=The property 'Point.Boundary' is of an interface type ('IGeometry'). If it is a navigation property manually configure the relationship for this property by casting it to a mapped entity type, otherwise ignore the property using the NotMappedAttribute or 'EntityTypeBuilder.Ignore' in 'OnModelCreating'.
Source=Microsoft.EntityFrameworkCore
StackTrace:
at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.PropertyMappingValidationConvention.Apply(InternalModelBuilder modelBuilder)
at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConventionDispatcher.ImmediateConventionScope.OnModelBuilt(InternalModelBuilder modelBuilder)
at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder, IModelValidator validator)
at System.Lazy`1.ViaFactory(LazyThreadSafetyMode mode)
at System.Lazy`1.ExecutionAndPublication(LazyHelper executionAndPublication, Boolean useDefaultConstructor)
at System.Lazy`1.CreateValue()
at Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
at Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model()
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScoped(ScopedCallSite scopedCallSite, ServiceProviderEngineScope scope)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
at Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
at Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
at Microsoft.EntityFrameworkCore.Internal.InternalAccessorExtensions.GetService[TService](IInfrastructure`1 accessor)
at Fleet.Data.Infrastructure.DbContextExtensions.EnsureMigrated(FleetDbContext context) in d:\WorkingCopy\fleet\Fleet.Data\Infrastructure\FleetDbContext.cs:line 99
at Fleet.Startup.Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory) in d:\WorkingCopy\fleet\Fleet\Startup.cs:line 267
继续执行项目的唯一方法是将NoMapping属性添加到我的模型的空间数据属性:
using System;
using System.ComponentModel.DataAnnotations;
using System.ComponentModel.DataAnnotations.Schema;
using NetTopologySuite.Geometries;
namespace Fleet.Data.Models
{
public enum GpsSources
{
Unknown = 0,
Shift,
Refuelling,
Transport,
Assistance,
Workshop
}
public class Gps
{
[Key]
public int Id { get; set; }
[Required]
public virtual Vehicle Vehicle { get; set; }
[Required]
[NotMapped]
public Point Location { get; set; }
public string Description { get; set; }
public GpsSources Source { get; set; }
public int SourceId { get; set; }
[Required]
public virtual ApplicationUser User { get; set; }
public DateTime Date { get; set; }
}
}
在CreateDbContext方法中,我设置为以这种方式使用拓扑套件:
var builder = new DbContextOptionsBuilder<FleetDbContext>();
builder.UseNpgsql(connectionString, o => o.UseNetTopologySuite());
进入OnModelCreating我确保postgis扩展以这种方式存在:
builder.HasPostgresExtension("postgis");
在数据库中,列已正确创建。
"Location" "public"."geometry" NOT NULL,
对我而言,这项工作在一个项目中,而不是另一个新项目。
首先,确保实际调用DbContextOptionsBuilder。这被设置为在某些情况下使用sql server,在其他情况下使用postgres基于appsetting。
接下来,这是我最新的错误,我必须对我的数据层进行一些nuget包更改:
<PackageReference Include="Microsoft.CodeCoverage" Version="1.0.3" />
<PackageReference Include="Microsoft.EntityFrameworkCore.InMemory" Version="2.2.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.SqlServer" Version="2.2.2" />
<PackageReference Include="Microsoft.EntityFrameworkCore.Tools" Version="2.2.2">
<PrivateAssets>all</PrivateAssets>
<IncludeAssets>runtime; build; native; contentfiles; analyzers</IncludeAssets>
</PackageReference>
<PackageReference Include="NetTopologySuite.IO.GeoJSON" Version="1.15.0" />
<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="2.2.0" />
<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL.Design"
Version="1.1.1" />
<PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL.NetTopologySuite"
Version="2.2.0" />
<PackageReference Include="Npgsql.GeoJSON" Version="1.0.0" />
<PackageReference Include="Npgsql.NetTopologySuite" Version="4.0.5" />
我不得不从我的单元测试项目中删除“Microsoft.EntityFrameworkCore.InMemory”。
配置DB:
var options = new DbContextOptionsBuilder<UserJurisdictionsContext>()
.UseNpgsql(configuration.GetConnectionString("DbConnection"),
x => x.UseNetTopologySuite())
.Options;
services.AddSingleton(options);
在这些更改后,我的单元测试工作。应用代码已经运行了。我的代码的每个其他区域看起来都与您添加的内容相同。