Create DeployKey & DeployKeysProject models. Bulding many to many relation…

app/models/deploy_key.rb

+class DeployKey < Key
+  has_many :deploy_keys_projects, dependent: :destroy
+  has_many :projects, through: :deploy_keys_projects
+end

app/models/deploy_keys_project.rb

+class DeployKeysProject < ActiveRecord::Base
+  attr_accessible :key_id, :project_id
+
+  belongs_to :project
+  belongs_to :deploy_key
+
+  validates :deploy_key_id, presence: true
+  validates :deploy_key_id, uniqueness: { scope: [:project_id], message: "already exists in project" }
+
+  validates :project_id, presence: true
+end

app/models/key.rb

@@ -16,7 +16,6 @@ require 'digest/md5'
 
 class Key < ActiveRecord::Base
   belongs_to :user
-  belongs_to :project
 
   attr_accessible :key, :title
 
@@ -29,7 +28,7 @@ class Key < ActiveRecord::Base
   delegate :name, :email, to: :user, prefix: true
 
   def strip_white_space
-    self.key = self.key.strip unless self.key.blank?
+    self.key = key.strip unless key.blank?
   end
 
   def fingerprintable_key
@@ -53,14 +52,10 @@ class Key < ActiveRecord::Base
 
   # projects that has this key
   def projects
-    if is_deploy_key
-      [project]
-    else
-      user.authorized_projects
-    end
+    user.authorized_projects
   end
 
   def shell_id
-    "key-#{self.id}"
+    "key-#{id}"
   end
 end