Need custom fields in the graphql response on the basis of db values

Hi , I have table which has totalCpuCount, diffCount, wisbCount, totalRequests etc etc (CapacityModel) per day basis for each application , I need to calculate the avg of the day and return the response in the custom fields. I cant store these custom field in the db

Basically in the response I get the list of node for each application (per date) but I want the average for the day.

schema.py

class CapacityNode(DjangoObjectType):
    deltas = generic.GenericScalar()
    class Meta:
        model = CapacityModel
        filter_fields = ['date', 'type', 'name', 'app']
        interfaces = (relay.Node,)


class Query(ObjectType):    
    capacity = relay.Node.Field(CapacityNode)
    all_capacity = DjangoFilterConnectionField(CapacityNode)

I need response something like

{
  "data": {
    "allCapacity": {
      "edges": [
        {
          "node": {
            "date": "2019-10-12",
            "avgTotalCpuCount": 11716,
            "avgDiffCount": -1375,
            "avgWisbCount": 2808,
            "avgTotalRequests": 247927
            "avgSkynetDefineInDnsCount": 1430,
            "avgCmsNonGenesisCount": 1547,
            "avgPoolCount": 10,}
		  }
		}
      ]
	}
  }
}

[monikadixit]

I was able to resolve this ,

`class avgCapacityNode(ObjectType): avgCpu=graphene.Float() avgWisb = graphene.Float()

class Query(ObjectType):

extra_field = graphene.Field(avgCapacityNode, date=graphene.String(), manager=graphene.String())

def resolve_extra_field(self, info, **kwargs):
    date = kwargs.get('date', None)
    manager =kwargs.get('manager', None)
    # manager =kwargs.get('manager', None)
    print(date)
    if date:
        avgCpu = CapacityModel.objects.filter(date = date).filter(manager = manager).aggregate(Avg('wisb') )
        avgWisb = CapacityModel.objects.filter(date = date).aggregate(Avg('total_requests') )
        avgCapacityNode.avgCpu = avgCpu['wisb__avg']
        avgCapacityNode.avgWisb = avgWisb['total_requests__avg']
        return avgCapacityNode
    else:
        avgCpu = CapacityModel.objects.filter(date = '2019-10-02').aggregate(Avg('wisb') )
        avgWisb = CapacityModel.objects.filter(date = '2019-10-02').aggregate(Avg('total_requests') )
        avgCapacityNode.avgCpu = avgCpu['wisb__avg']
        avgCapacityNode.avgWisb = avgWisb['total_requests__avg']
        return avgCapacityNode`

[team-jaitq]

Example:

Brand model

class Brand(models.Model):
    name = models.CharField(max_length=100, null=False)

    def __str__(self):
        return self.name

BrandNode

class BrandNode(DjangoObjectType):
    # extra field INT
    extra_field_real_id_plus_one = graphene.Int()

    def resolve_extra_field_real_id_plus_one(parent, info, **kwargs):
        value = parent.id + 1
        print(f'Real Id: {parent.id}')
        print(f'Id ++: {value}')
        return value

    class Meta:
        model = Brand
        filter_fields = {
            'name': ['icontains', 'exact']
        }
        interfaces = (relay.Node,)

extra_field_real_id_plus_one is the extra field. You can get any value from the original model, exactly from the parent parameter. You can calculate or format whatever you want and just you need to return the value. You can get the extra field calculated value in queries, mutations, etc.