[英]How to find entity with composite key in Entity Framework
I have an existing database on which I am using code-first EF. 我有一个现有的数据库,我使用代码优先EF。 Now the database has a table with a composite key.
现在数据库有一个带有复合键的表。 I define this table in the code as follows
我在代码中定义了这个表,如下所示
public class AssessmentResultType
{
[Key]
[Column(Order=1)]
public int AssessmentID {get; set;}
public int ResultType {get; set;}
[Key]
[Column(Order=2)]
public int ResultTypeID {get; set;}
.....
}
My repository is 我的存储库是
public class AssessmentResultTypeRespository : Repository<AssessmentResultType>
{
public AssessmentResultTypeRespository(string connString)
:base(connString)
{ }
}
Repository.cs Repository.cs
public class Repository<TEntity> : IRepository<TEntity> where TEntity:class
{
protected readonly GradeXpertContext context;
public Repository(string connString) {
context = new ge(connString);
}
public TEntity Get(int id)
{
return context.Set<TEntity>().Find(id);
}
public IEnumerable<TEntity> GetAll() {
return context.Set<TEntity>().ToList();
}
public void Add(TEntity entity) {
context.Set<TEntity>().Add(entity);
}
public void AddRange(IEnumerable<TEntity> entities) {
context.Set<TEntity>().AddRange(entities);
}
public void Remove(TEntity entity) {
context.Set<TEntity>().Remove(entity);
}
public void RemoveRange(IEnumerable<TEntity> entities) {
context.Set<TEntity>().RemoveRange(entities);
}
}
How do I adjust/override the above code to accept composite key only in case of AssessmentResultType
? 如何在
AssessmentResultType
情况下调整/覆盖上面的代码以接受复合键? So that I can write 这样我就可以写了
var art1 = repAssResultType.Get(32, 4);
Just change one method: 只需更改一种方法:
public TEntity Get(params object[] keyValues)
{
return context.Set<TEntity>().Find(keyValues);
}
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