CODEWITHSUNDEEP
pythondjango
mike braa
mike braa

Reputation: 637

how to use manytomany field with self?

I'm trying to use manytomany field but I'm so confused. what i'm trying to achive is; inside food category i want to show links for fries, steak,potato category pages. I'm trying to do it like this; 

class Category(models.Model): 
    name = models.CharField(max_length=128, unique=True)
    related_cat = models.ManyToManyField('self')



{% if category.related_cat %}

{{category.related_cat.name}}

{% endif %}

But this shows none... I'm so confused with this...can someone please clarify and direct me what I should do?

Upvotes: 0

Views: 45

Answers (1)

monkut
monkut

Reputation: 43870

Since your field, related_cat, is a ManyToManyField, it's reference can contain more than 1 object.

To access the objects in a ManyToManyField try:

{% if category.related_cat %}

    {% for related_category in category.related_cat.all %}
        {{related_category.name}}
    {% endfor %}

{% endif %}

For other examples:

https://docs.djangoproject.com/en/1.9/topics/db/examples/many_to_many/#many-to-many-relationships

Upvotes: 3

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