pagination.py

## utils.py
from django.core.paginator import EmptyPage, PageNotAnInteger, Paginator

def get_paginator(qs, page_size, page, count, paginated_type, **kwargs):
    """
    Method to paginate with some basics parameters in the query.
    @page: get current page
    @pages: show total of pages
    @count: show the total of items in the query
    @page_size: the page size param
    @has_next: says if have a next page
    @has_prev: says if have a prev page
    @results: the objects for this pagination
    """
    paginator = Paginator(qs, page_size)
    try:
        page = paginator.page(page)

    except PageNotAnInteger:
        page = paginator.page(1)

    except EmptyPage:
        page = paginator.page(paginator.num_pages)

    return paginated_type(
        page=page.number,
        pages=paginator.num_pages,
        count=paginator.count,
        page_size=paginator.per_page,
        has_next=page.has_next(),
        has_prev=page.has_previous(),
        results=page.object_list,
        **kwargs
    )

  
  ## schema.py
  class PostType(DjangoObjectType):
    class Meta:
        model = Post
        interfaces = (graphene.Node, )
        
  class PostPaginatedType(graphene.ObjectType):
    page = graphene.Int()
    pages = graphene.Int()
    count = graphene.Int()
    page_size = graphene.Int()
    has_next = graphene.Boolean()
    has_prev = graphene.Boolean()
    results = graphene.List(PostType)
    
  class Query(object):
    posts = graphene.Field(
        PostPaginatedType,
        page=graphene.Int(),
        page_size=graphene.Int()
    )
    
    def resolve_post(self, info, page=None, page_size=20, count=0, **kws):
       qs = Post.objects.all()

       return get_paginator(
           qs,page_size,page, count, PostPaginatedType)