serializers/crate: Prevent categories and keywords from being cleared

app/serializers/crate.js

@@ -1,5 +1,7 @@
 import ApplicationSerializer from './application';
 
+const SKIP_NULL_FIELDS = new Set(['categories', 'keywords']);
+
 export default class CrateSerializer extends ApplicationSerializer {
   isNewSerializerAPI = true;
 
@@ -10,4 +12,20 @@ export default class CrateSerializer extends ApplicationSerializer {
 
     return super.extractRelationships(...arguments);
   }
+
+  normalizeQueryResponse(_store, _modelClass, payload) {
+    // We don't want existing relationships overwritten by results with null values.
+    // See: https://github.com/rust-lang/crates.io/issues/10711
+    if (payload.crates) {
+      payload.crates = payload.crates.map(crate => {
+        for (const rel of SKIP_NULL_FIELDS) {
+          if (crate[rel] === null) {
+            delete crate[rel];
+          }
+        }
+        return crate;
+      });
+    }
+    return super.normalizeQueryResponse(...arguments);
+  }
 }

e2e/acceptance/crate.spec.ts

@@ -270,4 +270,33 @@ test.describe('Acceptance | crate page', { tag: '@acceptance' }, () => {
     await expect(page).toHaveURL('/crates/nanomsg');
     await expect(page.locator('[data-test-keyword]')).toBeVisible();
   });
+
+  test('keywords are shown when navigating from crate to keywords, and then back to crate', async ({ page, msw }) => {
+    loadFixtures(msw.db);
+
+    await page.goto('/crates/nanomsg');
+    await expect(page.locator('[data-test-keyword]')).toBeVisible();
+
+    await page.getByRole('link', { name: '#network', exact: true }).click();
+    await expect(page).toHaveURL('/keywords/network');
+    await page.getByRole('link', { name: 'nanomsg', exact: true }).click();
+
+    await expect(page).toHaveURL('/crates/nanomsg');
+    await expect(page.locator('[data-test-keyword]')).toBeVisible();
+  });
+
+  test('keywords are shown when navigating from crate to searchs, and then back to crate', async ({ page, msw }) => {
+    loadFixtures(msw.db);
+
+    await page.goto('/crates/nanomsg');
+    await expect(page.locator('[data-test-keyword]')).toBeVisible();
+
+    await page.fill('[data-test-search-input]', 'nanomsg');
+    await page.locator('[data-test-search-form]').getByRole('button', { name: 'Submit' }).click();
+    await expect(page).toHaveURL('/search?q=nanomsg');
+    await page.getByRole('link', { name: 'nanomsg', exact: true }).click();
+
+    await expect(page).toHaveURL('/crates/nanomsg');
+    await expect(page.locator('[data-test-keyword]')).toBeVisible();
+  });
 });

tests/acceptance/crate-test.js

@@ -1,4 +1,4 @@
-import { click, currentRouteName, currentURL, waitFor } from '@ember/test-helpers';
+import { click, currentRouteName, currentURL, fillIn, triggerEvent, waitFor } from '@ember/test-helpers';
 import { module, skip, test } from 'qunit';
 
 import { loadFixtures } from '@crates-io/msw/fixtures.js';
@@ -271,4 +271,33 @@ module('Acceptance | crate page', function (hooks) {
     assert.strictEqual(currentURL(), '/crates/nanomsg');
     assert.dom('[data-test-keyword]').exists();
   });
+
+  test('keywords are shown when navigating from crate to keywords, and then back to crate', async function (assert) {
+    loadFixtures(this.db);
+
+    await visit('/crates/nanomsg');
+    assert.dom('[data-test-keyword]').exists();
+
+    await click('[data-test-keyword="network"]');
+    assert.strictEqual(currentURL(), '/keywords/network');
+    await click('[href="/crates/nanomsg"]');
+
+    assert.strictEqual(currentURL(), '/crates/nanomsg');
+    assert.dom('[data-test-keyword]').exists();
+  });
+
+  test('keywords are shown when navigating from crate to searchs, and then back to crate', async function (assert) {
+    loadFixtures(this.db);
+
+    await visit('/crates/nanomsg');
+    assert.dom('[data-test-keyword]').exists();
+
+    await fillIn('[data-test-search-input]', 'nanomsg');
+    await triggerEvent('[data-test-search-form]', 'submit');
+    assert.strictEqual(currentURL(), '/search?q=nanomsg');
+    await click('[href="/crates/nanomsg"]');
+
+    assert.strictEqual(currentURL(), '/crates/nanomsg');
+    assert.dom('[data-test-keyword]').exists();
+  });
 });