From a67addc9576b38927beef227f11057e4b054bccb Mon Sep 17 00:00:00 2001
From: JihuiTanUchicago <tanjihui@uchicago.edu>
Date: Mon, 30 May 2022 22:38:50 +0000
Subject: [PATCH] create and delete  with jQuery and Ajax

---
 app/controllers/comments_controller.rb |  2 ++
 app/views/comments/_comment.html.erb   | 11 +++++++----
 app/views/comments/_form.html.erb      |  4 ++--
 app/views/comments/create.js.erb       | 12 ++++++++++++
 app/views/comments/destroy.js.erb      |  5 +++++
 5 files changed, 28 insertions(+), 6 deletions(-)
 create mode 100644 app/views/comments/create.js.erb
 create mode 100644 app/views/comments/destroy.js.erb

diff --git a/app/controllers/comments_controller.rb b/app/controllers/comments_controller.rb
index 5b62df9..490f6e9 100644
--- a/app/controllers/comments_controller.rb
+++ b/app/controllers/comments_controller.rb
@@ -33,6 +33,7 @@ def create
       if @comment.save
         format.html { redirect_back fallback_location: root_path, notice: "Comment was successfully created." }
         format.json { render :show, status: :created, location: @comment }
+        format.js
       else
         format.html { render :new, status: :unprocessable_entity }
         format.json { render json: @comment.errors, status: :unprocessable_entity }
@@ -59,6 +60,7 @@ def destroy
     respond_to do |format|
       format.html { redirect_back fallback_location: root_url, notice: "Comment was successfully destroyed." }
       format.json { head :no_content }
+      format.js {render template: "comments/destroy.js.erb"}
     end
   end
 
diff --git a/app/views/comments/_comment.html.erb b/app/views/comments/_comment.html.erb
index 25bdd33..b947029 100644
--- a/app/views/comments/_comment.html.erb
+++ b/app/views/comments/_comment.html.erb
@@ -1,4 +1,4 @@
-<li class="list-group-item">
+<li id="<%= dom_id(comment) %>" class="list-group-item">
   <div class="media">
     <%= image_tag comment.author.avatar_image, class: "rounded-circle mr-2", width: 36 %>
     <div class="media-body">
@@ -13,9 +13,12 @@
               <i class="fas fa-edit fa-fw"></i>
             <% end %>
 
-            <%= link_to comment, method: :delete, class: "btn btn-link btn-sm text-muted" do %>
-              <i class="fas fa-trash fa-fw"></i>
-            <% end %>
+          <%= link_to comment,
+            method: :delete,
+            class: "btn btn-link btn-sm text-muted",
+            remote: true do %>
+          <i class="fas fa-trash fa-fw"></i>
+          <% end %>
           <% end %>
         </div>
       </div>
diff --git a/app/views/comments/_form.html.erb b/app/views/comments/_form.html.erb
index f289224..2a10c2e 100644
--- a/app/views/comments/_form.html.erb
+++ b/app/views/comments/_form.html.erb
@@ -1,5 +1,5 @@
-<li class="list-group-item">
-  <%= form_with(model: comment) do |form| %>
+<li id="<%= dom_id(comment.photo) %>_new_comment_form" class="list-group-item">
+  <%= form_with(model: comment, local: false) do |form| %>
     <% if comment.errors.any? %>
       <div id="error_explanation">
         <ul class="list-unstyled">
diff --git a/app/views/comments/create.js.erb b/app/views/comments/create.js.erb
new file mode 100644
index 0000000..96c5e1d
--- /dev/null
+++ b/app/views/comments/create.js.erb
@@ -0,0 +1,12 @@
+var added_comment = $("<%= j(render 'comments/comment', comment: @comment) %>");
+
+var added_comment = $("<%= j(render @comment) %>");
+
+added_comment.hide();
+
+$("#<%= dom_id(@comment.photo) %>_new_comment_form").before(added_comment);
+
+added_comment.slideDown();
+
+$("#<%= dom_id(@comment.photo) %>_new_comment_form #comment_body").val("");
+
diff --git a/app/views/comments/destroy.js.erb b/app/views/comments/destroy.js.erb
new file mode 100644
index 0000000..ce114c2
--- /dev/null
+++ b/app/views/comments/destroy.js.erb
@@ -0,0 +1,5 @@
+$("#<%= dom_id(@comment) %>").fadeOut(500, function() {
+  $(this).remove();
+});
+
+console.log("bye comment!");