Dynamics CRM插件 - 對於輸入發佈值，搜索訂閱（如果找到）將其添加到創建/更新的聯繫人

Question

下面的代碼似乎在創建聯繫人時起作用，對於輸入值發佈它搜索並關聯現有訂閱。但是相同的代碼不適用於更新聯繫人。任何意見，爲什麼這可能會發生在我的插件？

if (!String.IsNullOrEmpty(publication)) 
{ 
    //Query for existing Publication 
    var publicationQuery = new QueryByAttribute("msdynhcp_publicationnewsletter"); 
    //publicationQuery.ColumnSet.AllColumns = true; 
    publicationQuery.Attributes.AddRange("msdynhcp_publicationname"); 
    publicationQuery.Values.AddRange(publication); 
    publicationQuery.TopCount = 1; 

    //Call Query 
    EntityCollection publicationIds = organizationService.RetrieveMultiple(publicationQuery); 

    if (publicationIds.Entities.Count > 0) 
    { 
     //Query for existing subscription 
     var subscriptionQuery = new QueryExpression("msdynhcp_subscription"); 

     var linkedContact = new LinkEntity("msdynhcp_subscription", "contact", "msdynhcp_contactlookup", "contact" + "id", JoinOperator.Inner); 
     linkedContact.LinkCriteria = new FilterExpression(LogicalOperator.And); 
     linkedContact.LinkCriteria.AddCondition("contact" + "id", ConditionOperator.Equal, ContactId); 
     subscriptionQuery.LinkEntities.Add(linkedContact); 

     var linkedPublication = new LinkEntity("msdynhcp_subscription", "msdynhcp_publicationnewsletter", "msdynhcp_publicationlookup", "msdynhcp_publicationnewsletter" + "id", JoinOperator.Inner); 
     linkedPublication.LinkCriteria = new FilterExpression(LogicalOperator.And); 
     linkedPublication.LinkCriteria.AddCondition("msdynhcp_publicationnewsletter" + "id", ConditionOperator.Equal, publicationIds[0].Id); 
     subscriptionQuery.LinkEntities.Add(linkedContact); 

     subscriptionQuery.TopCount = 1; 

     //Call Query 
     EntityCollection subscriptionIDs = organizationService.RetrieveMultiple(subscriptionQuery); 

     if (subscriptionIDs.Entities.Count == 0) 
     { 
      //New Subscription 
      var crmSubscription = new Entity("msdynhcp_subscription"); 
      crmSubscription["msdynhcp_utcdatetimestamp"] = DateTime.UtcNow; 
      crmSubscription["msdynhcp_enabledactive"] = true; 

      //Call Create 
      var id = organizationService.Create(crmSubscription); 

      //Call Associate 
      organizationService.Associate("msdynhcp_subscription", id, new Relationship("msdynhcp_contact_new_subscription_contactlookup"), 
       new EntityReferenceCollection(new List<EntityReference>() { new EntityReference("contact", new Guid(ContactId)) })); 
      //Call Associate 
      organizationService.Associate("msdynhcp_subscription", id, new Relationship("msdynhcp_new_publicationnewsletter_new_subscription_publicationlookup"), 
       new EntityReferenceCollection(new List<EntityReference>() { new EntityReference("msdynhcp_publicationnewsletter", publicationIds.Entities[0].Id) })); 
     } 
    } 
} 

Answer 1

爲了「教導一個人釣魚」而不是告訴你什麼是錯的，爲什麼不自己調試呢？您可以使用插件註冊工具create a serialized version of the plugin context, and then debug that yourself。

Answer 2

你沒有發佈整個插件邏輯，但是如果它在創建時工作並且不能在更新上工作，那麼很可能，你期望在你的插件中有一個根本就不存在的屬性。創建實體時，必須填寫所有必填字段（至少如果您在Web表單上執行該操作），並且所有這些屬性都位於插件的InputParameters中的Target中。但是當你更新實體時，只有被修改的屬性存在於InputParameters的Target中（當然還有一些標準屬性，如modifiedon，modifiedby等）。所以，最有可能的是，你的插件會檢查一些屬性是否爲null（這首先檢查publication看起來很可疑，但我不知道是否是這樣，因爲它不是完整的代碼。爲了確保該屬性在那裏，得到它從PostImage/PreImage不是目標（請參閱：https://msdn.microsoft.com/en-us/library/gg309673.aspx#Anchor_5）