Security Insights Additional navigation options New issue Closed carlreinkeopened this issueMay 13, 2018· 8 comments Contributor carlreinkecommentedMay 13, 2018• edited The query compiler throws an exception. System.InvalidOperationException: Sequence contains more than one element at System.Linq.Enume...
上面的例子中,LastName列被用来检查行的唯一性,如果我们添加的测试数据存在LastName重复的情况,那么下次执行迁移的时候将会得到异常信息:Sequence contains more than one element 关于如何处理冗余数据(redundant data),比如有两个名字为“Alexander Carson”的student数据,请查看Seeding and Debugging Entity Framework (EF...
SELECT`x`.`id`,`x`.`create_date`,`x`.`title`FROM`blog`AS`x`WHERE`x`.`id`>10LIMIT2 细心的你应该已经发现了两者的区别,Single需要查询2条数据,当返回的数据多余一条时,Single,SingleOrDefault方法就会报Source sequence contains more than one element.异常。所以Single方法仅适用于查询条件对应的数据只...
Updated to EF5 from June 2011 CTP and now any attempt to query database results in "Sequence contains more than one element" exception thrown at navigation property configuration... Something with mappings maybe remcoblok@hotmail.com 2012年2月29日 @Diego B Vega: First of all, you guys do...
I was able to map a many-to-many relationship with a composite key in some cases. But, the configuration is throwing an exception whenever the many-to-many is referencing the same table. The exception is "Sequence contains more than one matching element". ...
long[] schoolIDs = new long[] { 789, 999 }; var query = from x in context.Students where schoolIDs.Contains(x.Teacher.SchoolID) select x; It will throw an InvalidOperationException: Sequence contains more than one element. Possibly the same as #153 👍 1 ️ 1 Contributor rowan...
Error :” Sequence contains more than one matching element” Error 'Object reference not set to an instance of an object' when trying to call controller. Error "Could not load file or assembly 'Newtonsoft.Json" in unit test project Error 11007: Entity type 'sysdiagram' is not mapped. Erro...
Optional RestartSequenceOperation.StartValue Generate compiled relational model Global query filters produce too many parameters Optimize update path for single property JSON element JSON columns can be used in compiled models Unneeded parentheses removed in SQL queries ...
Optional RestartSequenceOperation.StartValue Generate compiled relational model Global query filters produce too many parameters Optimize update path for single property JSON element JSON columns can be used in compiled models Unneeded parentheses removed in SQL queries Set operations are supported over non...
Documentation (zero or one element) Property (zero or more elements) Annotation elements (zero or more elements)The table below describes the attributes that can be applied to the ComplexType element.Expand table Attribute NameIs RequiredValue Name Yes The name of the complex type. The name of...