models/crate-owner-invite: Add inviter and invitee relationships

Author: Turbo87

app/models/crate-owner-invite.js

@@ -1,9 +1,11 @@
-import Model, { attr } from '@ember-data/model';
+import Model, { attr, belongsTo } from '@ember-data/model';
 
 export default class CrateOwnerInvite extends Model {
   @attr invited_by_username;
   @attr crate_name;
   @attr crate_id;
   @attr('date') created_at;
   @attr accepted;
+  @belongsTo('user', { async: false, inverse: null }) invitee;
+  @belongsTo('user', { async: false, inverse: null }) inviter;
 }

app/serializers/crate-owner-invite.js

@@ -11,4 +11,11 @@ export default class CrateOwnerInviteSerializer extends ApplicationSerializer {
   payloadKeyFromModelName() {
     return 'crate_owner_invite';
   }
+
+  keyForRelationship(key) {
+    // Ember Data expects e.g. an `inviter` key in the payload, but the backend
+    // uses `inviter_id` instead. This method makes sure that Ember Data can
+    // find the correct relationship.
+    return `${key}_id`;
+  }
 }