Question

从mongodb atlas获取图像数据（二进制）到我的Django项目期间，我面临两种问题。

第一种情况

每当搜索http://127.0.0.1:8000/时，数据就会根据需要填充到html模板中，并显示长的跟踪信息，如here所示。

第二种情况

无论何时发送GET请求，浏览器都会通过在cmd或浏览器中不显示任何内容来保持无限加载。

在此处发布之前，我先搜索了错误并访问了github的django helpdesk，从中我无法找出问题的根源。

此处是要检查的代码 views.py

from django import template
from django.shortcuts import render
import gridfs 
import pymongo
import random
register = template.Library()
client = pymongo.MongoClient('mongodb+srv://danial:1234@wearit-qyueb.mongodb.net/test?retryWrites=true&w=majority')
db=client.scraped_data.all_brands
fs = gridfs.GridFS(client.scraped_data)



# Create your views here.
def index(request):
    template='products/products.html'
    return render(request,template,{'documents': get_random()[:20], 'categories':categories(), 'brands': brands()})


def categories():
    raw_data=get_random()
    all_categories=[]
    for doc in raw_data:
        if doc.get('cat_name') not in all_categories:
            all_categories.append(doc.get('cat_name'))

    return all_categories

def query_form(request):
     if request.method == 'GET':
        query_dict=request.GET
        select_category= query_dict.__getitem__('category-selected')
        min_price=query_dict.__getitem__('min-price')
        max_price=query_dict.__getitem__('max-price')
        listOfDocumets=[]
        if min_price!='' or max_price!='':
            listOfDocumets=range(min_price,max_price, db.find({'cat_name': select_category}))

        else:
            listOfDocumets=list(db.find({'cat_name': select_category}))
        random.shuffle(listOfDocumets)
        return render(request, 'products/products.html',{"documents": listOfDocumets, 'categories':categories(), 'brands': brands()})

def search_query(request):
    if request.method == 'GET':
        query_dict=request.GET
        select_brands= query_dict.__getitem__('search')
        if select_brands!='':
            listOfDocumets=list(db.find({'Brand': select_brands}))
            if len(listOfDocumets)>0:
                return render(request, 'products/products.html',{"documents": listOfDocumets, 'categories':categories()})
            else:
                return render(request,'products/errorpage.html')

        else:
            return(index(request))

def get_random():
    rand_doc = db.aggregate([{ '$sample': { 'size': db.count() } }])
    li=list(rand_doc)
    return li

def range(min_price,max_price, cat):
    listOfDocumets=list(cat)
    if min_price!=None:
        listOfDocumets=list(filter(lambda item:item.get('Price') >= int(min_price),listOfDocumets))
    if max_price!=None:
        listOfDocumets=list(filter(lambda item:item.get('Price') <= int(max_price),listOfDocumets))
    return listOfDocumets


def brands():
    raw_data=get_random()
    all_brands=[]
    for doc in raw_data:
        if doc.get('Brand') not in all_brands:
            all_brands.append(doc.get('Brand'))

    return all_brands

这是template_filter.py

from django import template
from products.views import fs
import codecs
register = template.Library()

@register.filter
def get_item(dictionary, key):
    if key=='data_chunk_id':
        return get_file_object(dictionary.get(key))
    else:
        return dictionary.get(key)

@register.filter
def get_file_object(file_id):
    out = fs.get(file_id[0]).read()
    base64_data = codecs.encode(out, 'base64')
    image = base64_data.decode('utf-8')
    return image

Django在“ ... \ python36-32 \ Lib \ wsgiref \ handlers.py”处终止了连接错误

0 个答案: