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官网地址: https://www.mindspore.cn/install 所有依赖环境 进行sudo make install 安装,最终报错: 错误记录信息: cat     /tmp/mindspore/build/mindspore/CMakeFiles/CMakeError.log Performing C SOURCE FILE Test CMAKE_HAVE_LIBC_PTHREAD failed with the following output:Change Dir: /tm…
Configure Many-to-Many relationship: Here, we will learn how to configure Many-to-Many relationship between the Student and Course entity classes. Student can join multiple courses and multiple students can join one course. Visit Entity Relationship …
现在,开始学习怎么配置一对一的关系,众所周知,一对一的关系是:一个表中的主键,在另外一个表中,同时是主键和外键[实际上是一对零或者一对一]. 请注意:一对一的关系,在MS SQL Server中,技术上是不可能实现的,主要还是一对零或者一对一的关系. 想了解更多的实体关系,请看MSDN,这里面讲解的很详细.----->>>Entity Relationship. 一.使用数据注解特性,来配置一对一(一对零)的关系. using System; using System.Collectio…
现在,我们将学习怎么配置一对多的关系. Visit Entity Relationship section to understand how EF manages one-to-one, one-to-many, and many-to-many relationships between the entities. Note: You do not need to configure for one-to-many relationships either using DataAnnotat…
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Why do I see a warning about "No appenders found for logger" and "Please configure log4j properly"?This occurs when the default configuration files log4j.properties and log4j.xml can not be found and the application performs no explici…
Configure Many-to-Many relationship: Here, we will learn how to configure Many-to-Many relationship between the Student and Course entity classes. Student can join multiple courses and multiple students can join one course. Visit Entity Relationship …
Configure One-to-Many Relationship: Here, we will learn how to configure One-to-Many relationship between two entities in code-first. Take an example of Student and Standard (grade) entities where one Standard can include many Students. So the relati…
Configure One-to-Zero-or-One Relationship: Here, we will configure One-to-Zero-or-One relationship between two entities, e.g. Entity1 can be associated with zero or only one instance of Entity2. Take an example of the following Student and StudentAdd…
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