Message=The entity type 'Fruit' requires a primary key to be defined. Source=Microsoft.EntityFrameworkCore StackTrace: at Microsoft.EntityFrameworkCore.Internal.ModelValidator.ShowError(String message) at Microsoft.EntityFrameworkCore.Internal.ModelValidator.EnsureNonNullPrimaryKeys(IModel model) at Microsoft...
public class Ejercicios : BaseModel private int _TipoEjercicio; public int TipoEjercicio}现在我的问题是当我试图运行Add-Migration,抛出 System.InvalidOperationException: The entity type 'Ejercicios' requiresa primary key to be defined. 浏览7提问于2016-12-27得票数 8 回答已采纳 1回答 当表/数据...
Doesn't matter how I create the model, I always get The entity type 'SearchRecords' requires a primary key to be defined. If you intended to use a keyless entity type call 'HasNoKey() Things tried: Different casing on Id, id, person_id A...
System.InvalidOperationException: 'The entity type 'StaffDetails' requires a primary key to be defined. If you intended to use a keyless entity type call 'HasNoKey()'.' System.InvalidOperationException: 'The required column 'Id' was not present in the results of a sql operation.' System.IO...
PRIMARY KEY [字段名]示例1:在定义字段的同时指定主键 mysql> CREATE TABLE test001( -> zd0 INT(10) PRIMARY KEY...test002( -> zd0 INT(10), -> zd1 VARCHAR(25), -> zd2 CHAR(10), -> zd3 FLOAT, -> PRIMARY...(见文末示例4)删除主键约束 #基本语法 ALTER TABLE DROP PRIMARY KEY; ...
Castleman disease is not a single disease but rather three clinicopathologically distinct entities: unicentric Castleman disease, idiopathic multicentric Castleman disease, and KSHV/HHV8-associated multicentric Castleman disease. The diagnostic algorithm for the classification of Castleman disease requires an ...
The ModelAdmin class requires jQuery by default, so there is no need to add jQuery to your ModelAdmin’s list of media resources unless you have a specific need. For example, if you require the jQuery library to be in the global namespace (for example when using third-party jQuery plugin...
报错:The slave is connecting using CHANGE MASTER TO MASTER_AUTO_POSITION = 1, but the master has purged binary logs containing GTIDs that the slave requires. 报错详情 org.apache.kafka.connect.errors.ConnectException: The slave is connecting using CHANGE MASTERTOMASTER_AUTO_POSITION=1, but the ...
(n = 36 and 19, respectively) in KD and BE KO embryos (Fig.2g; Supplementary information, Fig. S4band Table S5). In sum, these data suggest that NR5A2 is largely dispensable for the initiation of ZGA but plays a key role in transcriptional regulation especially during the 4–8C ...
The entity type 'IdentityUserLogin<string>' requires a primary key to be defined. Solved: The entity type xxx requires a primary key to be defined Hope this could help you. Best regards, Cathy Ji MSDN Community Support Please remember to click "Mark as Answer" the responses that resolved ...