Ria +协会-如何进行这项工作? [英] Ria + Associations - How to make this work?
问题描述
大家好，
我已经为这个问题苦苦挣扎了好几天，无法使其正常工作！通过阅读论坛中的帖子，我可以理解这里的一些人已经在LS中做到了这一点.
我使用ria可扩展，并且总是很好用.但是，我需要为两个实体建模并以一对多的方式关联它们.我以前没有做过.
我读过这样的帖子:
包含应以ria表示的关联方式.
但是，我将发布我的代码，以便有人可以帮助我找到我做错的事情.
这些是我在ria中的实体:
Transaccion公共类
{
[键]
public int ID {get;放; }
(这里有一些属性...)
[包含]
[Association("Transaccion_Operaciones"，"ID"，"TransaccionID"，IsForeignKey = false)]
公共ICollection< Operacion>歌剧{放; }
}
公共课Operapion
{
[键]
public int ID {get;放; }
public int TransaccionID {get;放; }
(这里有一些属性...)
[包含]
[Association("Transaccion_Operaciones"，"TransaccionID"，"ID"，IsForeignKey = true)]
公共Transaccion Transaccion {get;放; }
}
我仍然无法解决我的问题.我认为阅读过这篇文章的人已经检查了实体类在c#中的编码方式，然后找到正确的方法.
因此，我决定发布简化的查询版本，以构建并返回父子实体，以查看是否可以发现任何可能的错误原因.我的意思是孩子*不能*进入LS中的客户端屏幕的原因.
这是我用来编写查询的代码:
[Query(IsDefault = true)]
公共IQueryable< Transaccion> GetTransaccion()
{
List< Transaccion> list = new List< Transaccion>();
返回list.AsQueryable();
}
[Query(IsDefault = true)]
公共IQueryable< Operacion> GetOperacion()
{
List< Operacion> list = new List< Operacion>();
返回list.AsQueryable();
}
公共IQueryable< Transaccion> GetTransaccionByFilter(int?cia，字符串referencia，字符串来源)
{
//使用参数我构建过滤器"字符串...
var query = from Context.TransaccionesFinancieras中的t.
包括("TransaccionesFinancieras_Operaciones").
哪里(过滤器)
选择t;
简短的我= 0;
Transaccion transaccion;
列表< Transaccion> transaccion_List =新列表< Transaccion>();
foreach(查询中的TransaccionesFinanciera t)
{
transaccion =新的Transaccion()
{
ID =我，
//在这里填充父"实体属性，并将Operaciones实例化为列表
Operaciones = new List< Operacion>()
};
操作；
简短的OperacionID = 0;
foreach(t.TransaccionesFinancieras_Operaciones中的TransaccionesFinancieras_Operacione o)
{
操作=新的Operacion()
{
ID =操作符ID，
TransaccionID = transaccion.ID，
//更多属性在此处获得其值
};
//这是父"实体的属性
operaccion.Transaccion = transaccion;
//然后将孩子添加到父实体中的列表中
transaccion.Operaciones.Add(operacion);
opercionID ++;
}
//在这里，我将'master'实体添加到List< master实体类型>
transaccion_List.Add(transaccion);
i ++;
}
//最后，我返回主"实体的列表
//我在这里进行调试检查，只有*一位父母(列表中的一项)
//具有* all *的子代结构良好...
返回transaccion_List.AsQueryable();
}
如果有人在上面的代码中看到一些不适当的行，那就太好了.
Hi to all,
I've been struggling with this issue for days and can not make it work! From reading posts in the forum, I can understand some folks here have made this possible in LS.
I use ria extensible and it works nice always. However, I need to model two entities and associate them in one to many way. I have not made this before.
I have read posts like this:
which contains the way associations should be expressed in ria.
However, I will post my code so somebody can help me find what I do wrong.
These are my entities in ria:
public class Transaccion
{
[Key]
public int ID { get; set; }
(some properties here ...)
[Include]
[Association("Transaccion_Operaciones", "ID", "TransaccionID", IsForeignKey = false)]
public ICollection<Operacion> Operaciones { get; set; }
}
public class Operacion
{
[Key]
public int ID { get; set; }
public int TransaccionID { get; set; }
(some properties here ...)
[Include]
[Association("Transaccion_Operaciones", "TransaccionID", "ID", IsForeignKey = true)]
public Transaccion Transaccion { get; set; }
}
In my query, I read data from entities in model (external db) and fill these two entities using a List. Before issuing解决方案Hi,
I have still been unable to resolve my issue. I think people that have read this post have checked the way entity classes are coded in c# and find then correct.
So I have decided to post a simplified version of the queries that build and return the parent-child entities to see if you can spot any possible causes of error; I mean the reason why children *do not get* to client screen in LS.
This is the code I used to write my queries:
[Query(IsDefault = true)]
public IQueryable<Transaccion> GetTransaccion()
{
List<Transaccion> list = new List<Transaccion>();
return list.AsQueryable();
}
[Query(IsDefault = true)]
public IQueryable<Operacion> GetOperacion()
{
List<Operacion> list = new List<Operacion>();
return list.AsQueryable();
}
public IQueryable<Transaccion> GetTransaccionByFilter(int? cia, string referencia, string origen)
{
// with parameters I build 'filter' string ...
var query = from t in Context.TransaccionesFinancieras.
Include("TransaccionesFinancieras_Operaciones").
Where(filter)
select t;
short i = 0;
Transaccion transaccion;
List<Transaccion> transaccion_List = new List<Transaccion>();
foreach (TransaccionesFinanciera t in query)
{
transaccion = new Transaccion()
{
ID = i,
// here I fill my 'parent' entity properties and instantiate Operaciones as a List
Operaciones = new List<Operacion>()
};
Operacion operacion;
short operacionID = 0;
foreach (TransaccionesFinancieras_Operacione o in t.TransaccionesFinancieras_Operaciones)
{
operacion = new Operacion()
{
ID = operacionID,
TransaccionID = transaccion.ID,
// more properties get its value here
};
// this is the property for 'parent' entity
operacion.Transaccion = transaccion;
// then I add the child to the List in parent entity
transaccion.Operaciones.Add(operacion);
operacionID++;
}
// here I add 'master' entity to List<master entity Type>
transaccion_List.Add(transaccion);
i++;
}
// finally I return list of 'master' entities
// I check with debug here and there is *only* one parent (one item in List)
// with *all* its children well built ...
return transaccion_List.AsQueryable();
}
It'd be wonderful if somebody see some inappropriate lines in above code.
这篇关于Ria +协会-如何进行这项工作?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
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