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Attachment handling of SAP Fiori

2022-07-19 13:08:00 【InfoQ】

With  SAP CRM Fiori  Application, for example . Attachment processing has two levels , That is to say  Fiori UI  Show attachments on ( Read operation ), And by  Fiori UI  Create attachments ( Write operation ).

Attachment  The read

As shown in the figure below , Click any  Attachment  Hyperlinks ,

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That is, automatically open the browser download window .

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It's time to  OData  Corresponding implementation system , such as  AG3  backstage , Things code  
SEGW
, open  
CRM_OPPORTUNITY
 OData  project , Create a file called  
Opportunity_Attachments
  Of  association, Point to a name  
OpportunityAttachment
  Of  Dependent Entity.

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Opportunity  and  OpportunityAttachment  The relationship between models is  0:n,  That is, a  Opportunity  It's not allowed to  attachment, Multiple  attachment.

Attachment  Model fields for ：

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We can do it in  AG3  To set breakpoints , debugging  attachment  Read requests for ：

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Fiori UI  Put what you want to read  attachment  The instance information passes through  SAP UI5  Pass the code to the background  ABAP：

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Last call  
CL_CRM_OPPORTUNITY_DPC_EXT~GET_STREAM
  Methods from  AG3/001  Read attachment data on the system ：

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Fiori  The front desk is  S3.view.xml  It uses  
UploadCollection
  Control to display attachments .

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When  Attachment  When the tab is clicked , Trigger  
attachmentsTabSelected
  Method ：

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In this method , Manual call  OData API  Initiate reading data to the background  OData  request ：

var info = this.getView().byId('info');
 var headerGuid = info.getModel('json').getData().Guid;
 var oModel = this.oModel;
 var sPath = this.sPath;
 // get the list to set the post url param
 var that = this.getView();

 oModel.read(sPath, null, [
 "$expand=Attachments"
 ], true, jQuery.proxy(function(odata, response) {
 var data = {
 OpportunityAttachments: []
 };
 var length = response.data.Attachments.results.length;

Attachment  The creation of

Click on  
+
  Icon , Choose a file to upload locally ：

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SAP UI5  Control can display the uploaded progress bar ：

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Trigger the background  
CL_CRM_OPPORTUNITY_DPC_EXT～CREATE_STREAM
  Method ：

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CREATE_STREAM  Method to create a flow ( Media resources ) And corresponding entities ( Media link entries ). Additional information can be found in Slug In the head . The layout of creating media link entries is performed first HTTP Post, It only contains binary data . Be careful , It is not allowed to publish the item itself first , Then release relevant media resources . be based on Slug head , Developers can pass additional information to the server , for example , The server can be used to store binaries ( Media resources ) And create entities ( Media link entries ) Created framework . Newly created entity ( Media link entries ) stay HTTP The response is sent back to the user , The response can be updated with appropriate data . The updated entry will be in HTTP Put Send to SAP NetWeaver Gateway System , To complete the creation of media resources / The process of media link entries .
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