Fix wrong reference columns

app/controllers/session_controller.rb

@@ -11,7 +11,7 @@ def slack_callback
     # >> auth.info.user_id
     # => "U03AE1H0U"
 
-    credential = SlackCredential.find_or_initialize_by(user_id: auth.info.user_id)
+    credential = SlackCredential.find_or_initialize_by(slack_user_id: auth.info.user_id)
     user = if credential.new_record?
       User.create(email: auth.info.email,
                   name: auth.info.name,

app/models/slack_credential.rb

@@ -1,3 +1,5 @@
 class SlackCredential < ActiveRecord::Base
   belongs_to :user
+
+  validates :slack_user_id, uniqueness: true
 end

app/views/pages/_page.html.haml

@@ -11,5 +11,6 @@
 
 .content
   = raw page.render_content
+
 = render 'likes/list', page: page
 = render 'comments/list', page: page

app/views/pages/show.html.haml

@@ -1,6 +1,3 @@
-- content_for :css do
-  - stylesheet_link_tag 'pages'
-
 - if @page
   = render 'page', page: @page
 - else

db/migrate/20150905135019_fix_wrong_reference_columns.rb

@@ -0,0 +1,12 @@
+class FixWrongReferenceColumns < ActiveRecord::Migration
+  def change
+    remove_index :slack_credentials, name: :index_slack_credentials_on_users_id
+    rename_column :slack_credentials, :user_id, :slack_user_id
+    rename_column :slack_credentials, :users_id, :user_id
+    add_index :slack_credentials, [:user_id], name: :index_slack_credentials_on_user_id
+
+    remove_index :pages, name: :index_pages_on_users_id
+    rename_column :pages, :users_id, :user_id
+    add_index :pages, [:user_id], name: :index_pages_on_user_id
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20150905024738) do
+ActiveRecord::Schema.define(version: 20150905135019) do
 
   create_table "comments", force: :cascade do |t|
     t.integer  "user_id"
@@ -51,13 +51,13 @@
     t.string   "path"
     t.text     "title"
     t.text     "content"
-    t.integer  "users_id"
+    t.integer  "user_id"
     t.datetime "created_at", null: false
     t.datetime "updated_at", null: false
   end
 
   add_index "pages", ["content"], name: "index_pages_on_content"
-  add_index "pages", ["users_id"], name: "index_pages_on_users_id"
+  add_index "pages", ["user_id"], name: "index_pages_on_user_id"
 
   create_table "renamed_pages", force: :cascade do |t|
     t.string   "before_path"
@@ -67,13 +67,13 @@
   end
 
   create_table "slack_credentials", force: :cascade do |t|
-    t.integer  "users_id"
-    t.string   "user_id"
-    t.datetime "created_at", null: false
-    t.datetime "updated_at", null: false
+    t.integer  "user_id"
+    t.string   "slack_user_id"
+    t.datetime "created_at",    null: false
+    t.datetime "updated_at",    null: false
   end
 
-  add_index "slack_credentials", ["users_id"], name: "index_slack_credentials_on_users_id"
+  add_index "slack_credentials", ["user_id"], name: "index_slack_credentials_on_user_id"
 
   create_table "users", force: :cascade do |t|
     t.string   "name"