Hi,
I wonder if it is possible, to build XS OData Services based on XSDS (XS Data Services) managed entities.
asume a CDS entity named post is defined at .hdbdd file.
entity post {
key pid: Integer not null;
Title: String(63) not null;
Text: text;
Author: association [1] to user;
Parent: association [0..1] to post;
Rating: Integer;
Created: UTCDateTime;
//Comments: association [0..*] to comment via backlink Parent; //One-to-Many Associations via backlink
//Tags: association [0..*] to ds_comments via entity tags_by_post; //Many-to-Many Associations via entity
Replies: Association[*] to post on Replies.Parent.pid = pid; //Unmanaged Associations (can be defined at XSDS too)
};
As One-to-Many Associations via backlink and Many-to-Many Associations via entity are not supported yet at cds, these Associations are defined using XSDS.
var Post = XSDS.$importEntity("sap.hana.democontent.xsds", "bboard.post", {
//One-to-Many Associations
Comments: {
$association: {
$entity: "sap.hana.democontent.xsds::bboard.comment",
$viaBacklink: "Parent"
}
},
// Many-to-Many Associations
Tags: {
$association: {
$entity: "sap.hana.democontent.xsds::bboard.tag",
$viaEntity: "sap.hana.democontent.xsds::bboard.tags_by_post",
$source: "post",
$target: "tag",
}
},
so is it possible to create an XS OData service which is based on Post managed entity and inherits all the associations and metadata defined at cds and xsds level?
Kind regards
Rouzbeh