Added associations and tested them

app/models/comment.rb

@@ -1,3 +1,5 @@
 class Comment < ActiveRecord::Base
   attr_accessible :author_id, :body, :post_id
+  belongs_to :author, :class_name => 'Member'
+  belongs_to :post
 end

app/models/member.rb

@@ -3,6 +3,7 @@ class Member < ActiveRecord::Base
   friendly_id :login_name, use: :slugged
 
   has_many :posts,   :foreign_key => 'author_id'
+  has_many :comments, :foreign_key => 'author_id'
   has_many :gardens, :foreign_key => 'owner_id'
 
   # Include default devise modules. Others available are:

app/models/post.rb

@@ -3,6 +3,7 @@ class Post < ActiveRecord::Base
   friendly_id :author_date_subject, use: :slugged
   attr_accessible :body, :subject, :author_id
   belongs_to :author, :class_name => 'Member'
+  has_many :comments
   default_scope order("created_at desc")
 
   def author_date_subject

spec/factories/comments.rb

@@ -1,9 +1,7 @@
-# Read about factories at https://github.com/thoughtbot/factory_girl
-
 FactoryGirl.define do
   factory :comment do
-    post_id 1
-    author_id 1
-    body "MyText"
+    post
+    author
+    body "OMG LOL"
   end
 end

spec/models/comment_spec.rb

@@ -1,2 +1,16 @@
 require 'spec_helper'
 
+describe Comment do
+
+  before(:each) do
+    @comment = FactoryGirl.create(:comment)
+  end
+
+  it "belongs to a post" do
+    @comment.post.should be_an_instance_of Post
+  end
+
+  it "belongs to an author" do
+    @comment.author.should be_an_instance_of Member
+  end
+end

spec/models/member_spec.rb

@@ -44,6 +44,12 @@ describe 'member' do
       @member.gardens.first.name.should eq "Garden"
     end
 
+    it "has many comments" do
+      @member.save
+      @comment1 = FactoryGirl.create(:comment, :author => @member)
+      @comment2 = FactoryGirl.create(:comment, :author => @member)
+      @member.comments.length.should == 2
+    end
   end
 
   context 'no TOS agreement' do

spec/models/post_spec.rb

@@ -20,4 +20,11 @@ describe Post do
     @datestr.length.should == 4 + @time.year.to_s.size
     @post.slug.should == "#{@member.login_name}-#{@datestr}-a-post"
   end
+
+  it "has many comments" do
+    @post = FactoryGirl.create(:post, :author => @member)
+    @comment1 = FactoryGirl.create(:comment, :post => @post)
+    @comment2 = FactoryGirl.create(:comment, :post => @post)
+    @post.comments.length.should == 2
+  end
 end