Create json file for many to many fields in django - django

Question

I need to create json to insert data using inside both models, for tags I have created the json but I don't get how to create json for Question model to insert data directly from it.
model.py
class Tag(models.Model):
id = models.AutoField(primary_key=True)
name = models.CharField(max_length=255)
class Question(models.Model):
name = models.CharField(max_length=255)
Tag_name = models.ManyToManyField(Tag)
Tag json look like:
[
{ "name": "a" },
{ "name": "b" }
]
Since Tag_name is many to many field it create 2 tables in sqlite but I want to add data using one json only.How to make a json so that data in both table get inserted ?

Answer 1

Let suppose you have read json file and now you want to store that data to db
json_data = get_json_data() # write code to read json here
tag_list = []
for tag in json_data:
tag_list.append(Tag(**tag))
added_tags = Tag.objects.bulk_create(tag_list)
added_tags = [t.id for t in added_tags]
question_object = # write code to get specific question object in which you want to add this
question_object.Tag_name.add(*added_tags)

Answer 2

You could opt for the builtin management command, ./manage.py loaddata. I think it's easier.
You only need a json fixture for the tag model... the fixture, tags.json, could look like:
[
{
"model":"yourapp.tag",
"pk":1,
"fields":{"name": "a" }
},
{
"model":"yourapp.tag",
"pk":2,
"fields":{"name": "b" }
}
]
Store your tags.json inside a folder called fixtures inside your app. Finally, run ./manage.py loaddata tags.json. It will prepopulate the Tag model. Hope it helps...