Django - Linking Models - django

Question

I am using django and I want to link two models. The first model is comment and the second model is image. I want to have multiple images for one comment and an image should be linked with only one comment.
Comment model has its fields and image model looks like this:
class Image(models.Model):
image = models.ImageField(upload_to=f'{hash(id)}/', null=True, blank=True)
def __str__(self):
return self.image.name
And this is the model that I used to link comment and image:
class CommentImage(models.Model):
comment = models.OneToOneField(Comment, models.CASCADE, null=True)
image = models.ForeignKey(Image, models.CASCADE, null=True)
class Meta:
ordering = ["-id"]
verbose_name = _("Image")
verbose_name_plural = _("Images")
def __str__(self):
return self.image.image.name
Here is the admin panel of django:
enter image description here
As you can see I could be able add only one image and there is no button as well to add multiple image. What should I change to be able to add multiple images?
I have tried using ManytoManyField and removing comment field from CommentImage but it did not work.

Answer 1

I think you are overcomplicating things. Why not just add a text field to your ImageComment:
class Image(models.Model):
def upload_to(self, filename):
return f'{hash(self)}/{filename}'
image = models.ImageField(upload_to=upload_to, null=True, blank=True)
comment = models.ForeignKey(
'ImageComment', on_delete=models.SET_NULL, null=True
)
def __str__(self):
return self.image.name
class CommentImage(models.Model):
comment = models.TextField()
Or in case an Image can have multiple ImageComments as well, use a ManyToManyField:
class Image(models.Model):
def upload_to(self, filename):
return f'{hash(self)}/{filename}'
image = models.ImageField(upload_to=upload_to, null=True, blank=True)
comments = models.ManyToManyField(
'ImageComment'
)
def __str__(self):
return self.image.name
class CommentImage(models.Model):
comment = models.TextField()
You can even add an InlineModelAdmin to make editing comments at the same location as the image possible:
from django.contrib import admin
class ImageCommentInline(admin.TabularInline):
model = ImageComment
#admin.site.register(Image)
class ImageAdmin(admin.ModelAdmin):
inlines = [
ImageCommentInline,
]

Answer 2

You can try using this via manytomanyfields:
class CommentImage(models.Model):
comment = models.ForeignKey(Comment, models.CASCADE)
image = models.ForeignKey(Image, models.CASCADE)
class Comment(models.Model):
# other fields here
images = models.ManyToManyField(Image, through='CommentImage', related_name='comments')