subclass ManyToManyField to update path after adding authors

text/admin.py

@@ -11,6 +11,8 @@ class TextAdmin(admin.ModelAdmin):
     search_fields = ['title', 'authors__name', 'languages__name']
     list_display = ('title', 'version', 'file')
     list_filter = ('authors', )
+    filter_horizontal = ('authors', )
+
 admin.site.register(models.Text, TextAdmin)
 
 

text/models.py

@@ -36,6 +36,12 @@ class Author(models.Model):
         for text in self.texts.all():
             text.save()
 
+class AuthorField(models.ManyToManyField):
+    def save_form_data(self, instance, data):
+        super(AuthorField, self).save_form_data(instance, data)
+        #save instance after adding authors, file gets updated here
+        instance.save()
+
 class Language(models.Model):
     name = models.CharField(blank=True, max_length=1000)
     class Meta:
@@ -49,8 +55,8 @@ class Text(models.Model):
     title = models.CharField(blank=True, max_length=1000)
     version = models.CharField(blank=True, max_length=1000)
 
-    file = models.FileField(upload_to='Incoming', blank=True, max_length=2000)
-    authors = models.ManyToManyField(Author, related_name='texts', blank=True)
+    file = models.FileField(upload_to='tmp', blank=True, max_length=2000)
+    authors = AuthorField(Author, related_name='texts', blank=True)
     languages = models.ManyToManyField(Language, related_name='texts', blank=True)
     compilation = models.BooleanField(default=False)
 
@@ -117,6 +123,7 @@ class Text(models.Model):
         super(Text, self).save(*args, **kwargs)
         if rename and self.file:
             path = self.getComputedPath()
+            print path
             if path != self.file.path:
                 #FIXME: make sure path is not used by other test in system
                 if not os.path.exists(os.path.dirname(path)):
@@ -125,10 +132,8 @@ class Text(models.Model):
                 #print 'old', self.file.path
                 #print 'new', path
                 os.rename(self.file.path, path)
-                #FIXME: remove old dir if its empy
                 if not glob('%s/*' % old_dir):
                     os.rmdir(old_dir)
                 self.file.name = path[len(settings.MEDIA_ROOT) + 1:]
-                #this could be recursive!
-                self.save()
+                self.save(rename=False)