old_contents: from django import forms
  
  from . import models
  from pola.forms import (CommitDescriptionMixin,
                          FormHorizontalMixin, SaveButtonMixin,
                          ReadOnlyFieldsMixin)
  
  
  class CompanyForm(ReadOnlyFieldsMixin, SaveButtonMixin, FormHorizontalMixin,
                    CommitDescriptionMixin, forms.ModelForm):
      readonly_fields = [
          'name'
          ]
  
      class Meta:
          model = models.Company
          fields = [
              'nip',
              'name',
              'official_name',
              'address',
              'plCapital',
              'plCapital_notes',
              'plTaxes',
              'plTaxes_notes',
              'plRnD',
              'plRnD_notes',
              'plWorkers',
              'plWorkers_notes',
              'plBrand',
              'plBrand_notes',
              'verified',
          ]
  
new_contents: from django import forms
  
  from . import models
  from pola.forms import (CommitDescriptionMixin,
                          FormHorizontalMixin, SaveButtonMixin,
                          ReadOnlyFieldsMixin)
  
  
  class CompanyForm(ReadOnlyFieldsMixin, SaveButtonMixin, FormHorizontalMixin,
                    CommitDescriptionMixin, forms.ModelForm):
      readonly_fields = [
          'name'
          ]
  
      class Meta:
          model = models.Company
          fields = [
              'nip',
              'name',
              'official_name',
              'common_name',
              'address',
              'plCapital',
              'plCapital_notes',
              'plTaxes',
              'plTaxes_notes',
              'plRnD',
              'plRnD_notes',
              'plWorkers',
              'plWorkers_notes',
              'plBrand',
              'plBrand_notes',
              'verified',
          ]
  
subject: Add 'common_name' to company's form