来自 Oracle 数据库的特定 table 的脚手架 dbcontext 抛出与 table 无关的错误

Question

我正在尝试在现有的 Oracle 数据库中搭建一个特定 table 的数据库上下文。

dotnet ef dbcontext scaffold 'data source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=some.remote.hostname)(PORT=1337))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=SVC_NAME)));user id=USER;password=PASS' Oracle.EntityFrameworkCore --table TABLE_NAME --schema SCHEMA_NAME --use-database-names -f

CLI 然后打印

Build started... Build succeeded.

随后是大量以下类型的警告消息。警告中提到的 table 中的 None 与我的 table 我想要脚手架有关。

Unable to identify the primary key for table 'SCHEMA_NAME.SOME_OTHER_TABLE_NAME'.

Unable to generate entity type for table 'SCHEMA_NAME.SOME_OTHER_TABLE_NAME'.

一段时间后抛出异常

System.InvalidOperationException: The types of the properties specified for the foreign key {'SOME_COLUMN'} on entity type 'SOME_TABLE' do not match the types of the properties in the principal key {'SOME_OTHER_COLUMN'} on entity type 'SOME_TABLE'.
   at Microsoft.EntityFrameworkCore.Metadata.Internal.ForeignKey.AreCompatible(IReadOnlyList`1 principalProperties, IReadOnlyList`1 dependentProperties, EntityType principalEntityType, EntityType dependentEntityType, Boolean shouldThrow)
   at Microsoft.EntityFrameworkCore.Metadata.Internal.ForeignKey.AreCompatible(EntityType principalEntityType, EntityType dependentEntityType, MemberInfo navigationToPrincipal, MemberInfo navigationToDependent, IReadOnlyList`1 dependentProperties, IReadOnlyList`1 principalProperties, Nullable`1 unique, Nullable`1 required, Boolean shouldThrow)
   at Microsoft.EntityFrameworkCore.Metadata.Internal.EntityType.AddForeignKey(IReadOnlyList`1 properties, Key principalKey, EntityType principalEntityType, Nullable`1 configurationSource)
   at Microsoft.EntityFrameworkCore.Metadata.Internal.EntityType.Microsoft.EntityFrameworkCore.Metadata.IMutableEntityType.AddForeignKey(IReadOnlyList`1 properties, IMutableKey principalKey, IMutableEntityType principalEntityType)
   at Microsoft.EntityFrameworkCore.MutableEntityTypeExtensions.GetOrAddForeignKey(IMutableEntityType entityType, IReadOnlyList`1 properties, IMutableKey principalKey, IMutableEntityType principalEntityType)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitForeignKey(ModelBuilder modelBuilder, DatabaseForeignKey foreignKey)
   at Microsoft.EntityFrameworkCore.Scaffolding.Internal.RelationalScaffoldingModelFactory.VisitForeignKeys(ModelBuilder modelBuilder, IList`1 foreignKeys)    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 types of the properties specified for the foreign key {'SOME_COLUMN'} on entity type 'SOME_TABLE' do not match the types of the properties in the principal key {'SOME_OTHER_COLUMN'} on entity type 'SOME_TABLE'.

看来我的脚手架命令实际上忽略了 --table 选项并查看了整个数据库。显然有一些错误配置，我对此没有影响。

有办法解决这个问题吗？我可以手动构建 table 吗？

干杯

Answer 1

我找到了解决此问题的方法，从脚手架命令中删除架构参数并直接在 table 名称参数上传递架构

dotnet ef dbcontext scaffold 'data source=(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=some.remote.hostname)(PORT=1337))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=SVC_NAME)));user id=USER;password=PASS' Oracle.EntityFrameworkCore --table SCHEMA.TABLE_NAME --use-database-names -f

来自 Oracle 数据库的特定 table 的脚手架 dbcontext 抛出与 table 无关的错误

Scaffold dbcontext of specific table from oracle database throws error unrelated to that table

oracle

ef-core-2.1

.net-core-3.1