Reverted support to only data.post in meta layer

no issue

- It was partially removed in https://github.com/TryGhost/Ghost/pull/11080/files but didn't take into account hardcoded value in format response stage

core/frontend/meta/description.js

@@ -37,7 +37,7 @@ function getDescription(data, root, options) {
             description = data.post.meta_description || '';
         }
     } else if (_.includes(context, 'page') && data.post) {
-        // @NOTE:
+        // Page title dependent on legacy object formatting (https://github.com/TryGhost/Ghost/issues/10042)
         if (options && options.property) {
             postSdDescription = options.property + '_description';
             description = data.post[postSdDescription] || '';

core/frontend/meta/index.js

@@ -77,17 +77,17 @@ function getMetaData(data, root) {
         fallbackExcerpt;
 
     // TODO: cleanup these if statements
-    if (data.post || data.page) {
+    // NOTE: should use 'post' OR 'page' once https://github.com/TryGhost/Ghost/issues/10042 is resolved
+    if (data.post) {
         // There's a specific order for description fields (not <meta name="description" /> !!) in structured data
         // and schema.org which is used the description fields (see https://github.com/TryGhost/Ghost/issues/8793):
         // 1. CASE: custom_excerpt is populated via the UI
         // 2. CASE: no custom_excerpt, but meta_description is poplated via the UI
         // 3. CASE: fall back to automated excerpt of 50 words if neither custom_excerpt nor meta_description is provided
         // @TODO: https://github.com/TryGhost/Ghost/issues/10062
-        const prop = data.post ? 'post' : 'page';
-        customExcerpt = data[prop].excerpt || data[prop].custom_excerpt;
-        metaDescription = data[prop].meta_description;
-        fallbackExcerpt = data[prop].html ? getExcerpt(data[prop].html, {words: 50}) : '';
+        customExcerpt = data.post.excerpt || data.post.custom_excerpt;
+        metaDescription = data.post.meta_description;
+        fallbackExcerpt = data.post.html ? getExcerpt(data.post.html, {words: 50}) : '';
 
         metaData.excerpt = customExcerpt ? customExcerpt : metaDescription ? metaDescription : fallbackExcerpt;
     }

core/test/unit/data/meta/description_spec.js

@@ -189,6 +189,18 @@ describe('getMetaDescription', function () {
         description.should.equal('Best AMP post ever!');
     });
 
+    // NOTE: this is a legacy format and should be resolved with https://github.com/TryGhost/Ghost/issues/10042
+    it('legacy: should return data post meta description if on root context contains page', function () {
+        var description = getMetaDescription({
+            post: {
+                meta_description: 'Best page ever!'
+            }
+        }, {
+            context: ['page']
+        });
+        description.should.equal('Best page ever!');
+    });
+
     it('v2: should return data page meta description if on root context contains page', function () {
         var description = getMetaDescription({
             page: {

core/test/unit/data/meta/title_spec.js

@@ -128,6 +128,17 @@ describe('getTitle', function () {
         title.should.equal('Tag Name - My site title 3 (Page 39)');
     });
 
+    it('should return post title if in page context', function () {
+        var title = getTitle({
+            // 'post' property is dependent on legacy object formatting (https://github.com/TryGhost/Ghost/issues/10042
+            post: {
+                title: 'My awesome page!'
+            }
+        }, {context: ['page']});
+
+        title.should.equal('My awesome page!');
+    });
+
     it('should return translated pagination-string if passed in options object', function () {
         localSettingsCache.title = 'This is my site title';
 
@@ -259,7 +270,7 @@ describe('getTitle', function () {
     // NOTE: this case is unlikely as Ghost doesn't support AMP for static pages
     it('should return post title if in amp and page context', function () {
         var title = getTitle({
-            page: {
+            post: {
                 title: 'My awesome page!'
             }
         }, {context: ['amp', 'page']});

core/test/unit/helpers/ghost_head_spec.js

@@ -420,7 +420,7 @@ describe('{{ghost_head}} helper', function () {
 
         it('returns structured data on static page', function (done) {
             var renderObject = {
-                page: posts[0]
+                post: posts[0]
             };
 
             helpers.ghost_head(testUtils.createHbsResponse({
@@ -469,7 +469,7 @@ describe('{{ghost_head}} helper', function () {
 
         it('returns structured data on static page with custom post structured data', function (done) {
             var renderObject = {
-                page: posts[1]
+                post: posts[1]
             };
 
             helpers.ghost_head(testUtils.createHbsResponse({