from django.views.generic.list import BaseListView
from blog.models import Blog
from django.http import HttpResponse


class BlogListView(BaseListView):
    model = Blog
    # 每页条数
    paginate_by = 20

    def get_paginate_by(self, queryset):
        return self.request.GET.get('page_size') or self.paginate_by

    def render_to_response(self, context):
        paginator = context['paginator'] # 分页
        current_page = context['page_obj'] # 页号
        blogs = current_page.object_list

        data = {
            'blog_list': [
                {
                    'id': blog.id,
                    'title': blog.title,
                } for blog in blogs
            ],
            'paginator': {
                'total_count': paginator.count,
                'num_pages': paginator.num_pages,
                'page_size': paginator.per_page,
                'page_number': current_page.number,
            }
        }
        return HttpResponse(data.values())