Question

我最近更新到asp.net core 2.0。由于使用Include方法升级所有Linq查询失败，因此无法正确转换为SQL。

例如：

var entities = helpTopicRepository.Entities.Include(x => x.HelpArticles).FirstOrDefault(t => topicIds.Any(a => a == t.Id));

被翻译为：

SELECT x.HelpArticles.ART_ID, 
x.HelpArticles.AVAILABLE, 
x.HelpArticles.CONTENT, 
x.HelpArticles.DISPLAYORDER, 
x.HelpArticles.HELPFULNO, 
x.HelpArticles.HELPFULYES, 
x.HelpArticles.KEYWORDS, 
x.HelpArticles.TITLE, 
x.HelpArticles.TOPICID
FROM HELPARTICLE x.HelpArticles

导致以下错误：

Devart.Data.Oracle.OracleException (0x80004005): ORA-00933: SQL
命令未在Devart.Data.Oracle.ay.b（）处正确结束 Devart.Data.Oracle.am.f（）在Devart.Data.Oracle.am.e（）处于 Devart.Data.Oracle.c5.a（am A_0，Int32 A_1）at Devart.Data.Oracle.c5.a（Int32 A_0，bg A_1）at Devart.Data.Oracle.OracleCommand.InternalExecute（的CommandBehavior 行为，IDisposable一次性，Int32 startRecord，Int32 maxRecords，布尔非查询） Devart.Common.DbCommandBase.ExecuteDbDataReader（的CommandBehavior 行为，布尔非查询） Devart.Data.Oracle.Entity.ai.a（CommandBehavior A_0）at Devart.Common.Entity.cj.d（CommandBehavior A_0）at Devart.Data.Oracle.Entity.ai.b（CommandBehavior A_0）at System.Data.Common.DbCommand.ExecuteReader（）at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.Execute（IRelationalConnection connection，DbCommandMethod executeMethod，IReadOnlyDictionary 2 parameterValues) at Microsoft.EntityFrameworkCore.Storage.Internal.RelationalCommand.ExecuteReader(IRelationalConnection connection, IReadOnlyDictionary 2 parameterValues）at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable 1.Enumerator.BufferlessMoveNext(Boolean buffer) at Microsoft.EntityFrameworkCore.Query.Internal.QueryingEnumerable 1.Enumerator.MoveNext（）在 Microsoft.EntityFrameworkCore.Query.Internal.QueryBuffer.IncludeCollection（的Int32 includeId，INAVigation navigation，INavigation inverseNavigation， IEntityType targetEntityType，IClrCollectionAccessor clrCollectionAccessor，IClrPropertySetter inverseClrPropertySetter，布尔跟踪，对象实体，Func 1 relatedEntitiesFactory) at lambda_method(Closure , QueryContext , Client , Object[] ) at Microsoft.EntityFrameworkCore.Query.Internal.IncludeCompiler._Include[TEntity](QueryContext queryContext, TEntity entity, Object[] included, Action 3 fixup）at lambda_method（Closure，Client）at System.Linq.Enumerable.SelectEnumerableIterator 2.MoveNext() at System.Linq.Enumerable.SingleOrDefault[TSource](IEnumerable 1 source）在lambda_method（Closure，QueryContext）处 Microsoft.EntityFrameworkCore.Query.Internal.QueryCompiler＆LT;＆GT; c__DisplayClass17_0`1.b__0（QueryContext qc）ORA-00933：SQL命令未正确结束

我正在使用Devart dotconnect连接到Oracle数据库。

Answer 1

由于你的陈述：

var entities = helpTopicRepository.Entities.Include(x => x.HelpArticles).FirstOrDefault(t => topicIds.Any(a => a == t.Id));

假设topicIds是一个列表，这是一个修复：

var entities = helpTopicRepository.Entities
    .Include(x => x.HelpArticles)
    .Where(t => topicIds.Contains(t.Id))
    .FirstOrDefault();

Answer 2

修复了在EF Core 2中使用多个.Include（）的错误。期待dotConnect for Oracle的下一个公共构建。

EF Core Include方法不起作用

2 个答案: