old_contents: from django.contrib import admin
  
  from crm.models import *
  
  admin.site.register(Group)
  admin.site.register(Company)
  admin.site.register(Customer)
  admin.site.register(Supplier)
  admin.site.register(Department)
  admin.site.register(Quotation)
  admin.site.register(QuotationItem)
  
new_contents: from django.contrib import admin
  
  from crm.models import *
  
  admin.site.register(Group)
  admin.site.register(Company)
  admin.site.register(Customer)
  admin.site.register(Supplier)
  admin.site.register(Department)
  admin.site.register(Quotation)
  admin.site.register(QuotationItem)
  admin.site.register(Contract)
  admin.site.register(ContractItem)
  
subject: add contracts to admin