change bug of permissions list

apps/product/models.py

@@ -1,5 +1,6 @@
 from django.db import models
 from apps.core.models import BaseModel
+from apps.authorization.models import UserRelations
 
 
 # Create your models here.
@@ -56,8 +57,13 @@ class Attribute(BaseModel):
         null=True
     )
     name = models.CharField(max_length=100, default='empty')
+    type_choices = (
+        ('K', 'Per Kilo'),
+        ('', ''),
+    )
     type = models.CharField(
-        max_length=255,
+        max_length=10,
+        choices=type_choices,
         default='empty',
         help_text='type of attribute like: calculate product by kilogram'
     )
@@ -83,7 +89,8 @@ class AttributeValue(BaseModel):
     attribute = models.ForeignKey(
         Attribute,
         on_delete=models.CASCADE,
-        related_name='attribute_value'
+        related_name='attribute_value',
+        null=True
     )
     value = models.IntegerField(default=0)
 
@@ -94,16 +101,56 @@ class AttributeValue(BaseModel):
         return super(AttributeValue, self).save(*args, **kwargs)
 
 
+class Broker(BaseModel):
+    """ Broker for product """
+
+    reference_product = models.ForeignKey(
+        ReferenceProduct,
+        on_delete=models.CASCADE,
+        related_name='product_broker',
+        null=True
+    )
+    organization_relations = models.ForeignKey(
+        UserRelations,
+        on_delete=models.CASCADE,
+        related_name='product_organization',
+        null=True
+    )
+    calculation_choices = (
+        ('K', 'Per Kilo'),
+        ('', ''),
+    )
+    calculation_strategy = models.CharField(
+        max_length=3,
+        choices=calculation_choices,
+        default='empty'
+    )
+    required = models.BooleanField(default=False)
+
+    def __str__(self):
+        return f'{self.organization_relations.organization.name} - {self.reference_product.name}'
+
+    def save(self, *args, **kwargs):
+        return super(Broker, self).save(*args, **kwargs)
+
+
 class SaleUnit(BaseModel):
-    product = models.ForeignKey(
+    """ Units of product for sale """
+
+    reference_product = models.ForeignKey(
         ReferenceProduct,
         on_delete=models.CASCADE,
         related_name='sale_unit',
         null=True
     )
-    unit = models.CharField(max_length=255, null=True)
-    variation_coefficient = models.CharField(max_length=255, null=True)
+    unit_choices = (
+        ('10P', '10KG Package'),
+        ('50P', '50KG Package'),
+        ('', ''),
+    )
+    unit = models.CharField(max_length=10, choices=unit_choices, null=True)
+    variation_coefficient = models.IntegerField(default=0)
     required = models.BooleanField(default=False)
 
     def __str__(self):
-        return f'{self.product} - {self.unit} - {self.variation_coefficient}'
+        return f'{self.reference_product} - {self.unit} - {self.variation_coefficient}'