chore: add support for scope relationship to all models

addons/api/addon/models/base.js

@@ -1,7 +1,17 @@
 import Model from '@ember-data/model';
+import { belongsTo } from '@ember-data/model';
 import { computed } from '@ember/object';
 
 export default class BaseModel extends Model {
+
+  // =relationships
+
+  /**
+   * Scope of this resource, if any.
+   * @type {ScopeModel}
+   */
+  @belongsTo('scope', {async: false, inverse: false}) scope;
+
   // =attributes
 
   /**

addons/api/addon/models/scope.js

@@ -24,7 +24,7 @@ export default class ScopeModel extends GeneratedScopeModel {
    */
   @hasMany('scope', {inverse: 'parentScope'}) childrenScopes;
 
-  // =computed
+  // =attributes
 
   /**
    * @type {boolean}

addons/api/tests/unit/models/base-test.js

@@ -11,6 +11,35 @@ module('Unit | Model | base', function (hooks) {
     assert.ok(model);
   });
 
+  test('it may have a scope relationship', function (assert) {
+    assert.expect(1);
+    const store = this.owner.lookup('service:store');
+    store.push({
+      data: {
+        id: 'o_1',
+        type: 'scope'
+      }
+    });
+    store.push({
+      data: {
+        id: '123abc',
+        type: 'project',
+        attributes: {},
+        relationships: {
+          scope: {
+            data: {
+              id: 'o_1',
+              type: 'scope'
+            }
+          }
+        }
+      }
+    });
+    const scope = store.peekRecord('scope', 'o_1');
+    const model = store.peekRecord('project', '123abc');
+    assert.equal(model.scope, scope);
+  });
+
   test('it has a displayName attribute', function (assert) {
     assert.expect(3);
     const store = this.owner.lookup('service:store');