display posts by month/year ruby

问题

Not sure where to start with this so here goes.. I am building a small blog in which the date of each post is displayed, overtime there will be many blog posts per month, for which i would like to group together by the month it was published.

I want to display it like this in the view

Archives

January 2013
February 2013
March 2013
etc

When i click on a given month the idea is it will take me to all the posts that where published within that month.

So far I can group all the posts by month and year

@posts_by_month = Post.all.group_by { |post| post.created_at.strftime("%B %Y") }

In my view i then render like so

<% @posts_by_month.each do |m| %>
  <%= m %>
<% end %>

Which returns this in the view

["July 2013", [#<Post id: 1, title: "Ruby News", comments: "dsfdsfdsfdsfdsfds", category_id: 1, user_id: 1, created_at: "2013-07-26 07:10:25", updated_at: "2013-07-26 07:19:27", photo_file_name: "pf-7.jpg", photo_content_type: "image/jpeg", photo_file_size: 162495, photo_updated_at: "2013-07-26 07:19:26">]] 

So at the moment i have a hash where the month/year is the key and then all my posts in an array, is that correct?

All i want to display is the Month/Year and then click that month to be taken to all the posts for that month

Any help appreciated

EDIT

ok silly me, forgot my basics on key/value pairing, i have got just the date to display

<% @posts_by_month.each do |m,p| %>
  <%= link_to m %>
<% end %>

Now i just need to be able to click the link to see all posts for that month

回答1:

You could do

= link_to m, posts_path(:month => m)

Now in posts#index, fetch the posts based on params[:month]

if params[:month]
  date = Date.parse("1 #{params[:month]}")  # to get the first day of the month
  @posts = Post.where(:created_at => date..date.end_of_month)  # get posts for the month
else
  @posts = Post.all
end

来源：https://stackoverflow.com/questions/18010721/display-posts-by-month-year-ruby