CORE EF生成ORACLE數據庫模型報錯問題記錄

需求：最近在新開發一套在LINUX運行的API接口，需要用到net core api框架以及oracle數據庫，首先需要解決的就是連接數據庫問題，由於是DBFirst 加上之前很多老表不規范，導致了core EF生成模型報錯。正在解決。

net core版本： 2.2

依賴庫：

Microsoft.EntityFrameworkCore 2.2.6
Oracle.EntityFrameworkCore  2.2.6
Microsoft.EntityFrameworkCore.Tools 2.2.6
Microsoft.VisualStudio.Web.CodeGeneration.Design 2.2.4

在VS2019控制台通過以下語句生成數據庫模型

 Scaffold-DbContext "DATA SOURCE=地址:1521/zmbx;PASSWORD=密碼;PERSIST SECURITY INFO=True;USER ID=XXX;Validate Connection = true;" Oracle.EntityFrameworkCore -OutputDir Models -Project DBLib -Force

采用-Tables USERMOBILE 去生成表模型，可以生成 。 但是多個表生成就會有問題。根據提示信息表示可能是存在主鍵為空。有沒有辦法跳過為空的繼續生成？

錯誤如下 

The column 'xxx.xxx.ISCREATEPLAN' would normally be mapped to a non-nullable bool property, but it has a default constraint. Such a column is mapped to a nullable bool property to 
allow a difference between setting the property to false and invoking the default constraint. See https://go.microsoft.com/fwlink/?linkid=851278 for details.
Unable to identify the primary key for table 'xxx.xxx'.
Unable to generate entity type for table 'xxx.xxx'.
System.InvalidOperationException: The property list {'UserId', 'UserId'} cannot be used, because it contains a duplicate - 'UserId'.
   at Microsoft.EntityFrameworkCore.Metadata.Internal.EntityType.AddKey(IReadOnlyList`1 properties, ConfigurationSource configurationSource)
   at Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.HasKeyInternal(IReadOnlyList`1 properties, Nullable`1 configurationSource)
   at Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.PrimaryKey(IReadOnlyList`1 properties, ConfigurationSource configurationSource)
   at Microsoft.EntityFrameworkCore.Metadata.Internal.InternalEntityTypeBuilder.PrimaryKey(IReadOnlyList`1 propertyNames, ConfigurationSource configurationSource)
   at Microsoft.EntityFrameworkCore.Metadata.Builders.EntityTypeBuilder.HasKey(String[] propertyNames)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitPrimaryKey(EntityTypeBuilder builder, DatabaseTable table)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitTable(ModelBuilder modelBuilder, DatabaseTable table)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitTables(ModelBuilder modelBuilder, ICollection`1 tables)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitDatabaseModel(ModelBuilder modelBuilder, DatabaseModel databaseModel)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.Create(DatabaseModel databaseModel, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.ReverseEngineerScaffolder.ScaffoldModel(String connectionString, IEnumerable`1 tables, IEnumerable`1 schemas, String namespace, String language, String contextDir, String contextName, ModelReverseEngineerOptions modelOptions, ModelCodeGenerationOptions codeOptions)
   at Microsoft.EntityFrameworkCore.Design.Internal.DatabaseOperations.ScaffoldContext(String provider, String connectionString, String outputDir, String outputContextDir, String dbContextClassName, IEnumerable`1 schemas, IEnumerable`1 tables, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContextImpl(String provider, String connectionString, String outputDir, String outputDbContextDir, String dbContextClassName, IEnumerable`1 schemaFilters, IEnumerable`1 tableFilters, Boolean useDataAnnotations, Boolean overwriteFiles, Boolean useDatabaseNames)
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.ScaffoldContext.<>c__DisplayClass0_1.<.ctor>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.<>c__DisplayClass3_0`1.<Execute>b__0()
   at Microsoft.EntityFrameworkCore.Design.OperationExecutor.OperationBase.Execute(Action action)
The property list {'UserId', 'UserId'} cannot be used, because it contains a duplicate - 'UserId'.