First bookshelf implementation

ram/bookshelf/models.py

@@ -0,0 +1,80 @@
+from uuid import uuid4
+from django.db import models
+from django.conf import settings
+from django_countries.fields import CountryField
+
+from ckeditor_uploader.fields import RichTextUploadingField
+
+from metadata.models import (
+    Property,
+    Tag,
+)
+
+
+class Publisher(models.Model):
+    name = models.CharField(max_length=200)
+    country = CountryField(blank=True)
+    website = models.URLField(blank=True)
+
+    def __str__(self):
+        return self.name
+
+
+class Author(models.Model):
+    first_name = models.CharField(max_length=100)
+    last_name = models.CharField(max_length=100)
+
+    def __str__(self):
+        return f"{self.last_name}, {self.first_name}"
+
+    def short_name(self):
+        return f"{self.last_name} {self.first_name[0]}."
+
+
+class Book(models.Model):
+    uuid = models.UUIDField(primary_key=True, default=uuid4, editable=False)
+    title = models.CharField(max_length=200)
+    authors = models.ManyToManyField(Author)
+    publisher = models.ForeignKey(Publisher, on_delete=models.CASCADE)
+    ISBN = models.CharField(max_length=13, blank=True)
+    language = models.CharField(
+        max_length=7,
+        choices=settings.LANGUAGES,
+        default='en'
+    )
+    numbers_of_pages = models.SmallIntegerField(null=True, blank=True)
+    publication_year = models.SmallIntegerField(null=True, blank=True)
+    purchase_date = models.DateField(null=True, blank=True)
+    tags = models.ManyToManyField(
+        Tag, related_name="bookshelf", blank=True
+    )
+    notes = RichTextUploadingField(blank=True)
+    creation_time = models.DateTimeField(auto_now_add=True)
+    updated_time = models.DateTimeField(auto_now=True)
+
+    def __str__(self):
+        return self.title
+
+    def publisher_name(self):
+        return self.publisher.name
+
+    # def get_absolute_url(self):
+    #     return reverse("rolling_stock", kwargs={"uuid": self.uuid})
+
+
+class BookProperty(models.Model):
+    book = models.ForeignKey(
+        Book,
+        on_delete=models.CASCADE,
+        null=False,
+        blank=False,
+        related_name="property",
+    )
+    property = models.ForeignKey(Property, on_delete=models.CASCADE)
+    value = models.CharField(max_length=256)
+
+    def __str__(self):
+        return self.property.name
+
+    class Meta:
+        verbose_name_plural = "Properties"