Question

给定实体：团队，用户。它们之间的关系是N：N。

问题：如何查找属于指定团队的用户（使用给定的ID列表）。

PS。我发现如何处理单个团队，但不知道如何处理团队列表？

var team_id = ...
QueryExpression query = new QueryExpression("user");

// setting up relation between teams and users
Relationship rel = new Relationship();
rel.SchemaName = "new_teams_users";

RelationshipQueryCollection relatedEntity = new RelationshipQueryCollection();
relatedEntity.Add(rel, query);

RetrieveRequest request = new RetrieveRequest();
request.RelatedEntitiesQuery = relatedEntity;
request.ColumnSet = new ColumnSet(new string[] {"id"});

request.Target = new EntityReference { Id = team_id, LogicalName = "new_team" };

// Results: List of users by team id.
RetrieveResponse response = (RetrieveResponse)CrmService.Execute(request);

Answer 1

在交叉实体上构建QueryExpression会对你有所帮助。例如，我使用产品和竞争对手N：N关系

QueryExpression qe = new QueryExpression()
{
    EntityName = "competitorproduct",  //this name can be get from N:N rel properties (Relationship form, Relationship Entity Name field)
    ColumnSet = new ColumnSet(true),
};

qe.Criteria.AddCondition(
    "competitorid", 
    ConditionOperator.In, 
    new object[] { "GUID1", "GUID2"});

//Below is optional - if you need some details of entity, add LinkEntity object. This example adds all fields from product entity
LinkEntity lePorduct = new LinkEntity("competitorproduct", "product", "productid", "productid", JoinOperator.Inner);
lePorduct.Columns = new ColumnSet(true);
qe.LinkEntities.Add(lePorduct);

Answer 2

您可以将您的主要实体设为交叉点实体，因此在您的示例中，它将是＆＃34; TeamMembership＆＃34;然后根据属性＆＃34; SystemUserId＆＃34;。

设置标准

要获得有关团队的更多信息，您需要将团队实体作为链接实体添加到您的查询中

 LinkEntity TeamLink = new LinkEntity();
            TeamLink .EntityAlias = "TeamLink ";
            TeamLink .JoinOperator = JoinOperator.Inner;
            TeamLink .LinkFromEntityName = "teammembership";
            TeamLink .LinkFromAttributeName = "teamid";
            TeamLink .LinkToEntityName = "team";
            TeamLink .LinkToAttributeName = "teamid";

然后，您可以恢复所需的列，并获取数据。

通过N：N关系中的多个ID获取实体

2 个答案: