修复随机失败

app/controllers/blogs_controller.rb

@@ -13,9 +13,8 @@ class BlogsController < ApplicationController
 
   def show
     @post = Post.find(params[:id])
-    created_at = Time.at(@post.created_at.to_f)
-    @prev = Post.where(:created_at.lt => created_at).desc(:created_at).first
-    @next = Post.where(:created_at.gt => created_at).asc(:created_at).first
+    @prev = Post.where(:created_at.lt => @post.created_at).desc(:created_at).where(:id.ne => @post.id).first
+    @next = Post.where(:created_at.gt => @post.created_at).asc(:created_at).where(:id.ne => @post.id).first
     @comments = @post.comments
   end
 end

spec/controllers/blogs_controller_spec.rb

@@ -73,16 +73,26 @@ describe BlogsController do
       expect(assigns(:prev)).to eq(s_prev)
       expect(assigns(:next)).to eq(s_next)
 
+      # 下界
       selected = posts[0]
       get :show, id: selected.id
       expect(assigns(:prev)).to be_nil
       expect(assigns(:next)).to eq(posts[1])
 
+      # 测试上界
       selected = posts[2]
       get :show, id: selected.id
       expect(assigns(:prev)).to eq(posts[1])
       expect(assigns(:next)).to be_nil
 
+      # 测试未来时间
+      create(:post, created_at: Time.now + 100)
+      selected = posts[1]
+      get :show, id: selected.id
+      expect(assigns(:prev)).to eq(posts[0])
+      expect(assigns(:next)).to eq(posts[2])
+
+
     end
   end
 end

spec/spec_helper.rb

@@ -15,7 +15,7 @@ RSpec.configure do |config|
     DatabaseCleaner.start
   end
 
-  config.after do
+  config.after :each do
     DatabaseCleaner.clean
   end