group_by posts by day and then date with different div - ruby

Question

I have the following in my index action of posts controller:
#posts = Post.all.order("created_at DESC")
In my view like:
<% #posts.each do |post| %>
<%= post.title %>
<% end %>
I want to group the posts by day and then the date like the following:
Tuesday (date)
Sports
World
Politics
Monday (date)
Sports
Catering
I just want to have the day and date in separate div's:
(<div>
<%= day %>
</div>
<div>
<%= date %>
</div>)
I am using PostgreSQL.
UPDATE
create.js.erb
$("#post_table").html("<%= escape_javascript(render('posts/post')) %>")
$modal.modal("hide");
posts_controller:
before_action :all_posts, only: [:index, :new, :create]
def create
#post = Post.new(post_params)
#post.user_id = current_user.id
respond_to do |format|
if #post.save
format.html { redirect_to root_path }
format.js
flash[:notice] = "Successfully created post."
else
format.html { render action: 'new' }
format.js
end
end
end
private
def all_posts
#posts = Post.all.order("created_at DESC")
#post_groups=#posts.group_by{|post| [post.created_at.wday,post.created_at.to_date]}
end
index.html.erb
<% #post_groups.each do |group,posts| %>
<% day = group[1].strftime("%A") %>
<% date = group[1].strftime("#{group[1].day.ordinalize}" " %B " " %Y") %>
<div class="sort_by_date">
<span class="sort_by_post_day">
<%= day %>
</span>
<span class="sort_by_post_ordinals">
<%= date %>
</span>
</div>
<div id="post_table">
<%= render 'post', posts: #posts %>
</div>
<% end %>
Update is working fine, but whenever create a new post the refresh part is not working. it refresh but I could see the new post after I reload my website.
Thanks

Answer 1

controller
#post_groups=Post.order('created_at DESC').group_by{|post| [post.created_at.wday,post.created_at.to_date]}
View
<% #post_groups.each do |group,posts| %>
<%day=group[1].strftime("%A")%>
<%date=group[1].to_s%>
<div>
<%=day%>
</div>
<div>
<%=date%>
</div>
<br>
<%posts.each do |post|%>
<div><%=post.title%></div>
<%end%>
<hr>
<% end %>
In here I grouped all the posts by weekday and then group them with date.
This will return the hash of all the grouped data. hash key will be an array of format
[weekday,date] and value for this key will be an array of Posts which comes to this group and i am showing them in view according.
You can fiddle around view to change the styling according to your requirement.