Accessing nested fields via a function (M2M)

[yarnball]

Great work on this!

I'm having trouble with my nested data.

Due to my front end, my data has to stay in a this layout/=format. The data (what get_grouped_tags) returns will look like this:

    "tag" : {
      "1" : [ {
        "taglevel" : 1,
        "name" : "Foo"
      } ],
      "2" : [ {
        "taglevel" : 2,
        "name" : "Bazz"
      } ]
    },

I tried this, which tells me "illegal argument exceptions":

documents.py

from django_elasticsearch_dsl import DocType, Index, fields
from .models import Item

item = Index('items')

item.settings(
    number_of_shards=1,
    number_of_replicas=0
)

@item.doc_type
class ItemDocument(DocType):
    tag = fields.StringField(attr="get_grouped_tags")

    class Meta:
        model = Item
        fields = [
            'typetask',
            'title',
        ] 

models.py

class Tag(models.Model):
    name = models.CharField("Name", max_length=5000, blank=True)
    taglevel = models.IntegerField("Tag level", null=True, blank=True)

    def to_search(self):
        tags = self.id
        if tags:
            queryset = Item.objects.filter(tag=tags)
            for object in queryset:
                object.save()
        return queryset

class Item(models.Model):
    title = models.CharField("Title", max_length=10000, blank=True)
    tag = models.ManyToManyField('Tag', blank=True)

    def get_grouped_tags(self):
        tag = self.tag.order_by('taglevel')
        grouped_tags = {
            tag_level: [
                { 'name': tag_of_level.name, 'taglevel': tag_of_level.taglevel, }
                for tag_of_level in tags_of_level
            ] for tag_level, tags_of_level
            in groupby(tag, lambda tag: tag.taglevel)
        }
        return grouped_tags

• I tried tag = fields.NestedField(attr="get_grouped_tags"), but the tags field just comes up empty in the index.

• I tried:

    tag = fields.NestedField(properties={
        'name': fields.StringField(),
    })

But that returns this traceback gave be a keyError for manager (http://dpaste.com/35D46HP). Also, even if this did work, the data would still need to be presented as it looks in my function.

How do I properly access my nested data from an M2M field?

Thanks

PS:

Could be good to tell newbies how to install it pip install git+https://github.com/sabricot/django-elasticsearch-dsl.git

[yarnball]

Bump- if anyone can advise please let me know

[yarnball]

Please help me out- any user. I have tried so many ways without success

[yarnball]

Opened new thread, more clear error example #13