refactor product models. fix translation. add product image entity

products/models.py

@@ -3,11 +3,15 @@ from django.urls import reverse_lazy
 from django.contrib.postgres.fields import HStoreField
 from django.utils.translation import ugettext_lazy as _
 
-import mptt
+from mptt import (
+    models as mptt_models,
+    managers as mptt_managers,
+    register
+)
 from mptt.models import MPTTModel, TreeForeignKey
 from autoslug import AutoSlugField
 
-from core.models import AbstractStatusModel, AbstractDateTimeModel
+from core.models import AbstractStatusModel, AbstractDateTimeModel, STATUS_ACTIVE, STATUS_DELETED
 
 
 class ProductAttribute(AbstractStatusModel):
@@ -20,8 +24,9 @@ class ProductAttribute(AbstractStatusModel):
 
     class Meta:
         ordering = ('slug',)
-        verbose_name = _('Product attribute')
-        verbose_name_plural = _('Product attributes')
+        verbose_name = _('Аттрибут продукта')
+        verbose_name_plural = _('Аттрибуты продукта')
+
 
 class Manufacturer(AbstractStatusModel):
     name = models.CharField(max_length=64, blank=True, null=True, default=None)
@@ -34,31 +39,39 @@ class Manufacturer(AbstractStatusModel):
     def get_absolute_url(self):
         return reverse_lazy('products:manufacturer', kwargs={'producer_slug': self.slug, 'path': ''})
 
-    #@TODO: tranlsate into english and use traslation
+    # @TODO: tranlsate into english and use traslation
     class Meta:
         verbose_name = _('Производитель')
         verbose_name_plural = _('Производители')
 
 
+class ProductCategoryManager(mptt_managers.TreeManager):
+    def get_root_categories(self):
+        return self.get_queryset().all()
+
+
 class ProductCategory(MPTTModel, AbstractDateTimeModel):
     name = models.CharField(db_index=True, unique=True, max_length=64, blank=True, null=True, default=None)
     slug = AutoSlugField(populate_from='name')
     parent = TreeForeignKey('self', on_delete=models.CASCADE, null=True, blank=True, related_name='children')
     image = models.ImageField(upload_to='categories', blank=True, verbose_name="image of category")
 
+    objects = ProductCategoryManager()
+
     def __str__(self):
         return self.name
 
+    # @TODO: tranlsate into english and use traslation
     class Meta:
-        verbose_name = 'Product\'s category'
-        verbose_name_plural = 'Product\'s categories'
+        verbose_name = _("Категория")
+        verbose_name_plural = _("Категории")
         ordering = ('tree_id', 'level')
 
     class MPTTMeta:
         order_insertion_by = ['name']
 
 
-mptt.register(ProductCategory, order_insertion_py=['name'])
+register(ProductCategory, order_insertion_py=['name'])
 
 
 class Product(AbstractStatusModel):
@@ -67,7 +80,6 @@ class Product(AbstractStatusModel):
     price = models.DecimalField(max_digits=10, decimal_places=2, default=0.00)
     description = models.TextField(db_index=True, blank=True, null=True, default=None)
     manufacturer = models.ForeignKey(Manufacturer, on_delete=models.PROTECT)
-    image = models.ImageField(upload_to='products', blank=True, verbose_name="image of products")
     category = models.ForeignKey(ProductCategory, on_delete=models.SET_NULL, blank=True, null=True, default=None)
     attributes = models.ManyToManyField(ProductAttribute, blank=True)
     discount_policy = HStoreField(blank=True, null=True, default={})
@@ -83,8 +95,8 @@ class Product(AbstractStatusModel):
         indexes = [
             models.Index(fields=['id', 'slug'])
         ]
-        verbose_name = _('Product')
-        verbose_name_plural = _('Products')
+        verbose_name = _('Продукт')
+        verbose_name_plural = _('Продукты')
 
 
 
@@ -114,6 +126,40 @@ class ProductAttributeValue(AbstractDateTimeModel):
         verbose_name = 'Product attribute value'
         verbose_name_plural = 'Product attribute values'
 
+
+# ----------------- PRODUCT IMAGE STATUS LIST ------------------
+
+PRODUCT_IMAGE_STATUS_CHOICES = (
+    (STATUS_ACTIVE, _('Активный')),
+    (STATUS_DELETED, _('Удален')),
+)
+
+PRODUCT_IMAGE_DEFAULT_STATUS = STATUS_ACTIVE
+
+
+class ProductImage(AbstractStatusModel):
+    def get_file_path(self, filename):
+        return "products/attachments/{product}/{filename}".format(**{
+            'product': self.product.id,
+            'filename': filename
+        })
+
+    product = models.ForeignKey(Product, on_delete=models.CASCADE)
+    status = models.SmallIntegerField(_('Статус'), default=PRODUCT_IMAGE_DEFAULT_STATUS,
+                                      choices=PRODUCT_IMAGE_STATUS_CHOICES)
+    filename = models.CharField(_('Имя файла'), max_length=255)
+    image = models.FileField(_('Изображение'), upload_to=get_file_path, max_length=500)
+    is_default = models.BooleanField(_('По умолчанию'), default=False)
+
+    @classmethod
+    def create(cls, request, file):
+        product_image = cls(request=request, file=file, filename=file.name)
+        return product_image
+
+    class Meta:
+        verbose_name = _('Изображение продукта')
+        verbose_name_plural = _('Изображения продуктов')
+
 # class Offer(models.Model):
 #     name = models.CharField(max_length=64, blank=True, null=True, default=None)
 #     slug = AutoSlugField(populate_from='name')