move from md to haml partials

means the files need an _ in the beginning
we can just render
post must start with text as the title is generated
h2 is the first heading

app/models/page.rb

@@ -5,8 +5,9 @@ class Page
   def initialize(path)
     @dir = File.dirname(path)
     base , @ext = File.basename(path).split(".")
+    raise "must be partial, statr with _ not:#{base}" unless base[0] == "_"
     @words = base.split("-")
-    @year = parse_int(@words.shift , 2100)
+    @year = parse_int(@words.shift[1 .. -1] , 2100)
     @month = parse_int(@words.shift , 12)
     @day = parse_int(@words.shift , 32)
     raise "Invalid path #{path}" unless @words
@@ -18,20 +19,27 @@ class Page
   def title
     @words.join(" ")
   end
-
+  def template_name
+    "#{date}-#{slug}"
+  end
+  def date
+    "#{year}-#{month}-#{day}"
+  end
   def parse_int( value , max)
     ret = value.to_i
     raise "invalid value #{value} > #{max}" if ret > max or ret < 1
     ret
   end
   def content
-    File.open("#{@dir}/#{year}-#{month}-#{day}-#{slug}.#{ext}" ).read
+    File.open("#{@dir}/_#{template_name}.#{ext}" ).read
+  end
+  def summary
+    content.split("%h2").first.gsub("%p", "")
   end
-
   def self.pages
     return @@pages if @@pages
     @@pages ={}
-    Dir["#{self.blog_path}/2*.haml"].each do |file|
+    Dir["#{self.blog_path}/_2*.haml"].each do |file|
       page = Page.new(file)
       @@pages[page.slug] = page
     end

app/views/blog/_2017-2-2-Basic-instructions-for-writing-blogs.haml

@@ -1,5 +1,5 @@
 %p
-  some text that will be the short summary at the beggining.
+  some text that will be the short summary at the beginning.
   Remembering that the file name becomes the title (h1)
 
 %h2 Sub Headings should start with 2

app/views/blog/index.haml

@@ -1,5 +1,5 @@
 %h1 Index
 
 - @pages.each do |title , page|
-  %h3= link_to page.title , blog_page_path(page.title)
-  %p= page.content
+  %h3= link_to page.title , blog_page_path(page.slug)
+  %p= page.summary

app/views/blog/page.haml

@@ -1,3 +1,3 @@
 %h1= @page.title
 
-= page_content( @page)
+= render( @page.template_name )

config/environments/test.rb

@@ -1,8 +1,6 @@
 Rails.application.configure do
   # Settings specified here will take precedence over those in config/application.rb.
 
-  config.blog_path = Rails.root.to_s + "/spec/blog"
-
   # The test environment is used exclusively to run your application's
   # test suite. You never need to work with it otherwise. Remember that
   # your test database is "scratch space" for the test suite and is wiped

spec/blog/2017-2-2-Basic-instructions-for-writing-blogs.haml

@@ -1,8 +0,0 @@
-some text that will be the short summary at the beggining.
-Remembering that the file name becomes the title (h1)
-
-## Sub Headings should start with 2
-
-They have more text possibly with links <http://github.com/
-
-Paragraphs are created when there is a blank line

spec/features/blog/page_spec.rb

@@ -2,12 +2,12 @@
 feature 'Page show' do
 
   scenario 'page shows for correct title' do
-    visit_url blog_page_url("title")
-    expect(page).to have_content("Blog")
+    visit_url blog_page_url("Basic-instructions-for-writing-blogs")
+    expect(page).to have_content("instructions")
   end
   scenario 'page title shows for correct title' do
-    visit_url blog_page_url("title")
-    expect(page).to have_content("Bitcoin")
+    visit_url blog_page_url("Basic-instructions-for-writing-blogs")
+    expect(page).to have_content("Headings")
   end
 
 end

spec/models/page_spec.rb

@@ -4,17 +4,17 @@ RSpec.describe Page, type: :model do
 
   describe "creation" do
     it "ok with valid slug" do
-      page = Page.new("1993-2-4-title")
+      page = Page.new("_1993-2-4-title")
       expect(page).not_to eq nil
     end
     it "raises with invalid slug" do
-      expect{Page.new("1993-4-title")}.to raise_error RuntimeError
+      expect{Page.new("_1993-4-title")}.to raise_error RuntimeError
     end
   end
 
   describe "basic api" do
     before :each do
-      @page = Page.new("1993-2-4-title")
+      @page = Page.new("_1993-2-4-title")
     end
     it "returns title" do
       expect(@page.title).to eq "title"
@@ -24,26 +24,32 @@ RSpec.describe Page, type: :model do
       expect(@page.month).to eq 2
       expect(@page.day).to eq 4
     end
+    it "returns date" do
+      expect(@page.date).to eq "1993-2-4"
+    end
+    it "returns file_name" do
+      expect(@page.template_name).to eq "1993-2-4-title"
+    end
   end
 
   it "must start with a year" do
-    expect{Page.new("no-num-4-title")}.to raise_error RuntimeError
+    expect{Page.new("_no-num-4-title")}.to raise_error RuntimeError
+  end
+  it "must start with a underscore" do
+    expect{Page.new("_no-num-4-title")}.to raise_error RuntimeError
   end
   it "returns whole title" do
-    page = Page.new("1993-2-4-Multi-word-title")
+    page = Page.new("_1993-2-4-Multi-word-title")
     expect(page.title).to eq "Multi word title"
   end
   it "returns slug" do
-    page = Page.new("1993-2-4-Multi-word-title")
+    page = Page.new("_1993-2-4-Multi-word-title")
     expect(page.slug).to eq "Multi-word-title"
   end
   it "returns title without extension if given file name" do
-    page = Page.new("1993-2-4-title.rb")
+    page = Page.new("_1993-2-4-title.rb")
     expect(page.title).to eq "title"
   end
-  it 'returns blog path' do
-    expect(Page.blog_path.ends_with?("spec/blog")).to be true
-  end
   it "return a list of pages" do
     expect(Page.pages.values.first.content.length).to be > 10
   end