a working solution

Author: cjilbert504

app/controllers/posts_controller.rb

@@ -23,19 +23,31 @@ def edit
   def create
     @post = Post.new(post_params)
 
-    if @post.save
-      redirect_to @post, notice: "Post was successfully created."
+    if params[:publish]
+      if @post.publish
+        redirect_to @post, notice: "Post published"
+      else
+        render :new, status: :unprocessable_entity
+      end
     else
-      render :new, status: :unprocessable_entity
+      @post.save
+      redirect_to @post, notice: "Draft saved"
     end
   end
 
   # PATCH/PUT /posts/1 or /posts/1.json
   def update
-    if @post.update(post_params)
-      redirect_to @post, notice: "Post was successfully updated.", status: :see_other
+    @post.assign_attributes(post_params)
+
+    if params[:publish]
+      if @post.publish
+        redirect_to @post, notice: "Post published"
+      else
+        render :edit, status: :unprocessable_entity
+      end
     else
-      render :edit, status: :unprocessable_entity
+      @post.save
+      redirect_to @post, notice: "Draft updated"
     end
   end
 

app/models/post.rb

@@ -1,2 +1,7 @@
 class Post < ApplicationRecord
+  validates :title, :body, presence: true, on: :publish
+
+  def publish
+    save if valid?(:publish)
+  end
 end

app/views/posts/_form.html.erb

@@ -1,7 +1,10 @@
 <%= form_with(model: post) do |form| %>
   <% if post.errors.any? %>
     <div style="color: red">
-      <h2><%= pluralize(post.errors.count, "error") %> prohibited this post from being saved:</h2>
+      <h2>
+        <%= pluralize(post.errors.count, "error") %> prohibited this post from
+        being saved:
+      </h2>
 
       <ul>
         <% post.errors.each do |error| %>
@@ -22,6 +25,7 @@
   </div>
 
   <div>
-    <%= form.submit %>
+    <%= form.submit "Save Draft", name: :draft %>
+    <%= form.submit "Publish", name: :publish %>
   </div>
 <% end %>