} }//不建议用特性指定,这里只是为了演示[Owned]publicclassModifyUser : ValueObject {publicstringName {get;privateset; }publicstringTel {get;privateset; }publicModifyUser(stringname,stringtel ) {this.Name =name;this.Tel =tel; }protectedoverrideIEnumerable<object>GetAtomicValues() {yieldreturnName +...
EF8 now supports “Complex Types” to cover this third type of object. Complex types in EF Core are very similar to complex types in EF6, but there are some differencee. Complex type objects: Are not identified or tracked by key value. Must be defined as part of an entity type. (In...
BinaryExpression equalExpr;object? otherValue =null;if(other !=null) { otherValue = prop.GetValue(other); } Type propType = prop.PropertyType;varleftExpr = MakeMemberAccess(propAccessor.Body, prop); Expression rightExpr = Convert(Constant(otherValue), propType);if(propType.IsPrimitive) { equ...
Properties of Value object needs to have setters to add them with ef core migrations. public class Address : ValueObject { public String Street { get; set; } // without this "set;" this will not work orderConfiguration.OwnsOne(p => p.Address) .Property(p=>p.Street).HasColumnName("Sh...
publicclassPersonName:ValueObject<PersonName> {publicstaticPersonNameCreate(stringfirst,stringlast){returnnewPersonName (first, last); }privatePersonName(){ }privatePersonName(stringfirst,stringlast){ First = first; Last = last; }publicstringFirst {get;privateset; }publicstringLast {get;privateset...
I want to call a user defined SQL SERVER function and use as parameter a property that is a value object. The EF Core documentation shows only samples with primitive types. I can't manage to create a working mapping. The entities of our ...
在这个过程中,渐渐地理解了过去理解不了的原理,所以,这应该可以算作一种收获,DDD对当下业务而言是否合适,我还没有找到答案,不过,单纯地去使用“充血模型”应该可以算做一种进步,就像以前实现ValueObject要考虑很多东西,而现在可以直接使用Record,这种意识有时候是潜移默化的、甚至是可遇不可求的,也许,这就是一个...
本文带你更深入地研究访问EF Core 5的一些元数据和其有趣的使用方式。 1、将EF的ToTraceString移植为EF Core的ToQueryString 在Entity Framework的第一个迭代版本中,没有内置的日志记录。但是有ObjectQuery.ToTraceString(),这是一种运行时方法,可以动态计算LINQ或Entity SQL查询的SQL,尽管这不是一个...
We plan to allow mapping an object to multiple columns in a future version of EF Core, removing the need to use serialization here. This is tracked byGitHub issue #13947. הערה As with the previous example, this value object is implemented as areadonly struct. This means that ...
有个实体属性定义为int类型，但数据库查询结果中出现了NULL值，将类型改为int?解决了 ...