diff --git a/client/html/post_edit_sidebar.tpl b/client/html/post_edit_sidebar.tpl
index cf28ed3..54a3388 100644
--- a/client/html/post_edit_sidebar.tpl
+++ b/client/html/post_edit_sidebar.tpl
@@ -1,65 +1,64 @@
 <div class='edit-sidebar'>
     <form autocomplete='off'>
         <div class='input'>
-            <section class='safety'>
-                <label>Safety</label>
-                <%= ctx.makeRadio({
-                    name: 'safety',
-                    class: 'safety-safe',
-                    value: 'safe',
-                    selectedValue: ctx.post.safety,
-                    text: 'Safe'}) %>
-                <%= ctx.makeRadio({
-                    name: 'safety',
-                    class: 'safety-sketchy',
-                    value: 'sketchy',
-                    selectedValue: ctx.post.safety,
-                    text: 'Sketchy'}) %>
-                <%= ctx.makeRadio({
-                    name: 'safety',
-                    value: 'unsafe',
-                    selectedValue: ctx.post.safety,
-                    class: 'safety-unsafe',
-                    text: 'Unsafe'}) %>
-            </section>
+            <% if (ctx.canEditPostSafety) { %>
+                <section class='safety'>
+                    <label>Safety</label>
+                    <%= ctx.makeRadio({
+                        name: 'safety',
+                        class: 'safety-safe',
+                        value: 'safe',
+                        selectedValue: ctx.post.safety,
+                        text: 'Safe'}) %>
+                    <%= ctx.makeRadio({
+                        name: 'safety',
+                        class: 'safety-sketchy',
+                        value: 'sketchy',
+                        selectedValue: ctx.post.safety,
+                        text: 'Sketchy'}) %>
+                    <%= ctx.makeRadio({
+                        name: 'safety',
+                        value: 'unsafe',
+                        selectedValue: ctx.post.safety,
+                        class: 'safety-unsafe',
+                        text: 'Unsafe'}) %>
+                </section>
+            <% } %>
 
-            <section class='tags'>
-                <%= ctx.makeTextInput({
-                    text: 'Tags',
-                    value: ctx.post.tags.join(' '),
-                    readonly: !ctx.canEditPostTags}) %>
-            </section>
+            <% if (ctx.canEditPostTags) { %>
+                <section class='tags'>
+                    <%= ctx.makeTextInput({
+                        text: 'Tags',
+                        value: ctx.post.tags.join(' '),
+                    }) %>
+                </section>
+            <% } %>
 
-            <section class='relations'>
-                <%= ctx.makeTextInput({
-                    text: 'Relations',
-                    name: 'relations',
-                    placeholder: 'space-separated post IDs',
-                    pattern: '^[0-9 ]*$',
-                    value: ctx.post.relations.map(rel => rel.id).join(' '),
-                    readonly: !ctx.canEditPostRelations}) %>
-            </section>
+            <% if (ctx.canEditPostRelations) { %>
+                <section class='relations'>
+                    <%= ctx.makeTextInput({
+                        text: 'Relations',
+                        name: 'relations',
+                        placeholder: 'space-separated post IDs',
+                        pattern: '^[0-9 ]*$',
+                        value: ctx.post.relations.map(rel => rel.id).join(' '),
+                    }) %>
+                </section>
+            <% } %>
 
-            <% if ((ctx.editingNewPost && ctx.canCreateAnonymousPosts) || ctx.post.type === 'video') { %>
+            <% if (ctx.canEditPostFlags && ctx.post.type === 'video') { %>
                 <section class='flags'>
                     <label>Miscellaneous</label>
 
-                    <% if (ctx.editingNewPost && ctx.canCreateAnonymousPosts) { %>
-                        <%= ctx.makeCheckbox({
-                            text: 'Don\'t show me as uploader',
-                            name: 'anonymous'}) %>
-                    <% } %>
-
-                    <% if (ctx.post.type === 'video') { %>
-                        <!-- TODO: bind state -->
-                        <%= ctx.makeCheckbox({
-                            text: 'Loop video',
-                            name: 'loop',
-                            readonly: !ctx.canEditPostFlags}) %>
-                    <% } %>
+                    <!-- TODO: bind state -->
+                    <%= ctx.makeCheckbox({
+                        text: 'Loop video',
+                        name: 'loop',
+                    }) %>
                 </section>
             <% } %>
         </div>
+
         <div class='messages'></div>
 
         <div class='buttons'>
diff --git a/client/js/controllers/post_controller.js b/client/js/controllers/post_controller.js
index 397390e..c2ba12a 100644
--- a/client/js/controllers/post_controller.js
+++ b/client/js/controllers/post_controller.js
@@ -100,9 +100,15 @@ class PostController {
     _evtPostEdit(e) {
         // TODO: disable form
         const post = e.detail.post;
-        post.tags = e.detail.tags;
-        post.safety = e.detail.safety;
-        post.relations = e.detail.relations;
+        if (e.detail.tags !== undefined) {
+            post.tags = e.detail.tags;
+        }
+        if (e.detail.safety !== undefined) {
+            post.safety = e.detail.safety;
+        }
+        if (e.detail.relations !== undefined) {
+            post.relations = e.detail.relations;
+        }
         post.save()
             .then(() => {
                 misc.disableExitConfirmation();
diff --git a/client/js/controls/post_edit_sidebar_control.js b/client/js/controls/post_edit_sidebar_control.js
index fa1e776..b6817e1 100644
--- a/client/js/controls/post_edit_sidebar_control.js
+++ b/client/js/controls/post_edit_sidebar_control.js
@@ -34,7 +34,9 @@ class PostEditSidebarControl extends events.EventTarget {
             this._formNode.addEventListener('submit', e => this._evtSubmit(e));
         }
 
-        this._tagControl = new TagInputControl(this._tagInputNode);
+        if (this._tagInputNode) {
+            this._tagControl = new TagInputControl(this._tagInputNode);
+        }
     }
 
     _evtSubmit(e) {
@@ -42,14 +44,20 @@ class PostEditSidebarControl extends events.EventTarget {
         this.dispatchEvent(new CustomEvent('submit', {
             detail: {
                 post: this._post,
-                safety:
+
+                safety: this._safetyButtonNodes.legnth ?
                     Array.from(this._safetyButtonNodes)
                         .filter(node => node.checked)[0]
-                        .value.toLowerCase(),
-                tags:
-                    misc.splitByWhitespace(this._tagInputNode.value),
-                relations:
-                    misc.splitByWhitespace(this._relationsInputNode.value),
+                        .value.toLowerCase() :
+                    undefined,
+
+                tags: this._tagInputNode ?
+                    misc.splitByWhitespace(this._tagInputNode.value) :
+                    undefined,
+
+                relations: this._relationsInputNode ?
+                    misc.splitByWhitespace(this._relationsInputNode.value) :
+                    undefined,
             },
         }));
     }
diff --git a/client/js/models/post.js b/client/js/models/post.js
index fad9f0c..e269eec 100644
--- a/client/js/models/post.js
+++ b/client/js/models/post.js
@@ -212,10 +212,10 @@ class Post extends events.EventTarget {
             _canvasHeight:  response.canvasHeight,
             _fileSize:      response.fileSize,
 
-            _tags:          response.tags,
-            _notes:         response.notes,
+            _tags:          response.tags || [],
+            _notes:         response.notes || [],
             _comments:      CommentList.fromResponse(response.comments || []),
-            _relations:     response.relations,
+            _relations:     response.relations || [],
 
             _score:         response.score,
             _favoriteCount: response.favoriteCount,
diff --git a/client/js/util/views.js b/client/js/util/views.js
index 1be6173..2f1f4d7 100644
--- a/client/js/util/views.js
+++ b/client/js/util/views.js
@@ -59,6 +59,7 @@ function makeRadio(options) {
             value: options.value,
             type: 'radio',
             checked: options.selectedValue === options.value,
+            disabled: options.readonly,
             required: options.required,
         }) +
     _makeLabel(options, {class: 'radio'});
@@ -75,6 +76,7 @@ function makeCheckbox(options) {
             type: 'checkbox',
             checked: options.checked !== undefined ?
                 options.checked : false,
+            disabled: options.readonly,
             required: options.required,
         }) +
     _makeLabel(options, {class: 'checkbox'});