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Django Query Optimization #1490

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daudln asked this question in Q&A
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Hello team,

I have designed my GraphQL DTO using graphene django like this

NOTE: eventTags and eventData are relationship model, other are only fields

class EventObjectType(DjangoObjectType):
 class Meta:
 model = Event
 fields = [
 "eventTime", "eventName", "eventSeverity", "eventPriority", "eventType", "eventLevel", "eventLogLevel",
 "eventAudience", "eventAudienceTeam", "eventFrequency", "eventSource", "eventTags", "eventData"
 ]
class EventResponseObject(graphene.ObjectType):
 response = graphene.Field(ResponseObject)
 page = graphene.Field(PageObject)
 data = graphene.List(EventObjectType)

When I query like this

query GetEvents($filtering: EventFilteringInputObject) {
 getEvents(filtering: $filtering) {
 response {
  id
  status
  code
  message
 }
 page {
  number
  hasNextPage
  hasPreviousPage
  nextPageNumber
  previousPageNumber
 }
 data {
  eventTime
 }
  
 }
 _debug {
 sql {
  rawSql
 }
 }
}

I though Graphene/ Graphene Django could be enough to select only field I have specified in query, However it queries all fields in database even of related models.

I have tried to improve it may be using graphene_django_optimizer.gql_optimizer package func but it does not

Here is how how I perform optimization

queryset = gql_optimizer.query(model.objects.filter(filters).only(lookup), info=info)
 paginated_data = Paginator(queryset, items_per_page)
 page_obj = paginated_data.page(page_number)
 data = [builder_function(getattr(obj, lookup)) for obj in page_obj]
 page = PageObject.get_page(paginated_data.page(page_number))
 return ResponseObject.get_response(id="1"), page, data

Any one have ever done optimization in Graphql to assist.

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