def self.post_template
    posts = Post.all
    result = []

    posts.each do |post|
        single_post = {}
        single_post['comment_title'] = post.comment.title
        single_post['comment_content'] = post.comment.content

        result << single_post
    end

    # return the result
    result
end

namespace :post do
    task :comments => :environment do
        comments = Post.post_template
        puts comments
    end
end

{ 'comment_title' => 'stuff', 'comment_content' => 'content' }
{ 'comment_title' => 'stuff', 'comment_content' => 'content' }
{ 'comment_title' => 'stuff', 'comment_content' => 'content' }

> rails c
> comments = Post.post_template
-- [{ 'comment_title' => 'stuff', 'comment_content' => 'content' },
   { 'comment_title' => 'stuff', 'comment_content' => 'content' }]

namespace :post do
    task :comments => :environment do
        comments = Post.post_template

        data = {}
        data['messages'] = comments
    end
end

task :array do
    puts ["First", "Second"]
end

> rake array
First
Second