Request.GET 在自定义 HTML Django Rest Framework 渲染器模板中不可用

Posted 2023-02-24

【中文标题】Request.GET 在自定义 HTML Django Rest Framework 渲染器模板中不可用

【英文标题】：Request.GET not available in custom HTML Django Rest Framework renderer template

【发布时间】：2021-04-08 12:26:24

【问题描述】：

我有这个使用 Django Rest Framework 的自定义 html 渲染器：

from rest_framework.renderers import TemplateHTMLRenderer

class CustomHTMLRenderer(TemplateHTMLRenderer):
    def
        renderer_context = renderer_context or 
        view = renderer_context['view']
        request = renderer_context['request']
        response = renderer_context['response']

        if response.exception:
            template = self.get_exception_template(response)
        else:
            template_names = self.get_template_names(response, view)
            template = self.resolve_template(template_names)

        context = self.get_template_context('content': data, renderer_context)
        return template.render(context)

这是我对在我的 Solr 服务器上执行的搜索的看法：

import os
from django.conf import settings
from rest_framework.generics import GenericAPIView
from rest_framework.response import Response
from rest_framework.renderers import JSONRenderer
from rest_framework.pagination import LimitOffsetPagination
import collections
from collections import OrderedDict
from rest_framework.settings import api_settings
import scorched
from scorched.strings import DismaxString

from bassculture.renderers.custom_html_renderer import CustomHTMLRenderer

class SearchResultsPagination(LimitOffsetPagination):
    def get_paginated_response(self, data):
        
        self.solr_response = data['solr_response']
        self.offset = self.solr_response.result.start
        self.limit = len(data['records'])
        self.count = self.solr_response.result.numFound
        self.request = data['request']

        resp = Response(OrderedDict(
            'count': self.count,
            'next': self.get_next_link(),
            'previous': self.get_previous_link(),
            'results': data['records'],
            'facets': self.solr_response.facet_counts.facet_fields,
            'params': self.solr_response.params,
            'highlighting': self.solr_response.highlighting,
            'limit': self.limit,

        ))

        return resp


class SearchViewHTMLRenderer(CustomHTMLRenderer):
    template_name = "search/search.html"

class SearchView(GenericAPIView):
    renderer_classes = [JSONRenderer, SearchViewHTMLRenderer]
    pagination_class = SearchResultsPagination

    def get(self, request, *args, **kwargs):
        querydict = request.GET
        offset = querydict.get('offset', 0)

        fcq = 
        for f in settings.SEARCH_FACETS:
            if querydict.get(f, None):
                fcq[f] = querydict.get(f)

        fq = 
        if querydict.get('fq'):
            fq = querydict.get('fq')
        else:
            fq = '*'

        si = scorched.SolrInterface(settings.SOLR_SERVER)
        response = si.query(DismaxString(querydict.get('q'))).filter(**fcq).filter(fq).highlight('*', fragsize=10).paginate(start=int(offset), rows=api_settings.PAGE_SIZE).facet_by(fields=settings.SEARCH_FACETS, mincount=1).execute()

        for d in response:
            d['highlighted_string'] = response.highlighting[d['id']]
        results_list = response

        records = []
        for result in response:
            type = result['type']
            pk = result['id'].split('_')[1]
            result['url'] = request.build_absolute_uri(os.path.join('/fiddle/', type, pk))
            records.append(result)

        d = 
            'records': records,
            'solr_response': response,
            'request': request,
        
        resp = self.get_paginated_response(d)

        return resp

结果的 JSON 正在通过。实际上，如果我将 renderer_classes 更改为

renderer_classes = [JSONRenderer]

浏览器显示原始 JSON。所以，我想，我的 HTML 渲染器有问题。会是什么呢？ HTML 渲染器在我网站的其他页面中工作得很好（我不必处理 JSON 数据）。

Django==3.1.4 djangorestframework==3.12.2

更新

我发现问题在于我无法从我的模板访问我的请求参数。我有一个

% if request.GET.q %
Results....
% endif %

这使结果页面无效。

如何访问我的请求参数？我的设置中有'django.template.context_processors.request'。

【参考方案1】：

我忘记在我的回复template.render 调用中添加request=request：

return template.render(context, request=request)