fix models

Author: seuros

app/models/invitation.rb

@@ -14,4 +14,6 @@
 #
 
 class Invitation < ActiveRecord::Base
+  belongs_to :team
+  belongs_to :user, foreign_key: :inviter_id
 end

app/models/opportunity.rb

@@ -37,7 +37,7 @@ class Opportunity < ActiveRecord::Base
 
   OPPORTUNITY_TYPES = %w(full-time part-time contract internship)
 
-  has_many :seized_opportunities
+  has_many :seized_opportunities, :delete_all
 
   # Order here dictates the order of validation error messages displayed in views.
   validates :name, presence: true, allow_blank: false

app/models/team.rb

@@ -90,6 +90,8 @@ class Team < ActiveRecord::Base
 
   mount_uploader :avatar, TeamUploader
 
+  has_many :invitations, dependent: :delete_all
+  has_many :opportunities, dependent: :destroy
   has_many :followers, through: :follows, source: :team
   has_many :follows,   class_name: 'FollowedTeam',    foreign_key: 'team_id', dependent: :destroy
   has_many :jobs,      class_name: 'Opportunity',     foreign_key: 'team_id', dependent: :destroy
@@ -739,10 +741,9 @@ def reindex_search
     end
   end
 
+
   def remove_dependencies
-    [FollowedTeam, Invitation, Opportunity, SeizedOpportunity].each do |klass|
-      klass.where(team_id: self.id.to_s).delete_all
-    end
+      FollowedTeam.where(team_id: self.id.to_s).delete_all
     User.where(team_id: self.id.to_s).update_all('team_id = NULL')
   end