Gjort om Id til en klasse med en en-til-en-relasjon til book, og sørget for at id har funksjonen getid og setid.

python/web/library/admin.py

@@ -1,7 +1,7 @@
 from web.library.models import *
 from django.contrib import admin
 
-mod = [Category, BookSeries, ReferenceType, Reference, Book, AlternativeTitle, Copy, Person, Relation, BookPerson, Placement]
+mod = [Category, BookSeries, ReferenceType, Reference, Book, AlternativeTitle, Copy, Person, Relation, BookPerson, Placement, Id]
 
 for model in mod:
 	admin.site.register(model)

python/web/library/models.py

@@ -22,7 +22,7 @@ class Reference(models.Model):
 
 class Book(models.Model):
 	isbn = models.CharField(max_length=13, primary_key=True)
-	id = models.CharField(max_length=255)
+#	id = models.CharField(max_length=255)
 	title = models.CharField(max_length=511)
 	subtitle = models.CharField(max_length=511, null=True, blank=True)
 	category = models.ForeignKey(Category, null=True, blank=True)
@@ -43,11 +43,40 @@ class Book(models.Model):
 			except Category.DoesNotExist:
 				print '%-15s: %50s' % (field[1], 'Does not exist')
 
-	class Meta:
-		unique_together=(("isbn","id"),)
+	def getid(self):
+		try:
+			return self.id.id
+		except Id.DoesNotExist:
+			return None
+
+	def setid(self,newid):
+		try:
+			id = self.id
+			id.delete()
+			newid = Id(book=self,id=newid)
+			newid.save()
+
+		except Id.DoesNotExist:
+			id=Id(id=newid,book=self)
+			id.save()
+#		return Book.get(isbn=self.isbn)
+		
+
+	def __unicode__(self):
+		return self.title
+
+#	def print(self):
+#		print '%13s %5s %30s %'
+
+#	class Meta:
+#		unique_together=(("isbn","id"),)
+
+class Id(models.Model):
+	id = models.CharField(max_length=511, primary_key=True)
+	book = models.OneToOneField(Book)
 
 class AlternativeTitle(models.Model):
-	book = models.ForeignKey(Book)
+	book = models.ForeignKey(Book, related_name='alt_titles')
 	alt_title = models.CharField(max_length=511)
 
 class Copy(models.Model):
@@ -59,16 +88,25 @@ class Person(models.Model):
 	id = models.CharField(max_length=255, primary_key=True)
 	first_name = models.CharField(max_length=255)
 	last_name = models.CharField(max_length=255)
-	references = models.ManyToManyField(Reference, related_name='persons')
+	references = models.ManyToManyField(Reference, related_name='persons', null=True, blank=True)
+
+	def __unicode__(self):
+		return self.first_name + u' ' + self.last_name
 
 class Relation(models.Model):
 	name = models.CharField(max_length=31)
 
+	def __unicode__(self):
+		return self.name
+
 class BookPerson(models.Model):
-	book = models.ForeignKey(Book)
-	person = models.ForeignKey(Person)
+	book = models.ForeignKey(Book, related_name='person')
+	person = models.ForeignKey(Person, related_name='books')
 	relation = models.ForeignKey(Relation)
 
+	def __unicode__(self):
+		return self.person.first_name +u' '+ self.person.last_name+ u' '+ self.relation.name+ u' of '+self.book.title
+
 class Placement(models.Model):
 	category = models.ForeignKey(Category)
 	shelf = models.CharField(max_length=10)