added dynamic field link to company, to display on admin if it has a shop_link

companies/admin.py

@@ -16,8 +16,5 @@ class CompanyAdmin(admin.ModelAdmin):
         PointField: {"widget": GooglePointFieldWidget}
     }
 
-    def link(self, company):
-        return company.shop_link is not None
-
 
 admin.site.register(models.Company, CompanyAdmin)

companies/models.py

@@ -57,3 +57,8 @@ class Company(models.Model):
     class Meta:
         verbose_name = "Compañía"
         verbose_name_plural = "Compañías"
+
+    def link(self):
+        return self.shop_link is not None
+
+    link.boolean = True