天气 Api 正确/错误的城市过滤器不起作用（Django 项目 - 下面的 views.py 文件）

Question

weatherapi.com 给我两个不同的城市存在或城市不存在的答复

#当我尝试添加错误的城市时，我从 api 收到重播。 {'error': {'code': 1006, 'message': 'No matching location found.'}}

#when I am writing right city name I get this reply from api. {'location': {'name': 'Texas City', 'region': 'Texas', 'country': 'United States of America', 'lat': 29.38, 'lon': -94.9, 'tz_id': 'America/Chicago', 'localtime_epoch': 1670842210, 'localtime': '2022-12-12 4:50'}, 'current': { 'last_updated_epoch': 1670841900, 'last_updated': '2022-12-12 04:45', 'temp_c': 18.9, 'temp_f': 66.0, 'is_day': 0, 'condition': {'text': 'Overcast ', 'icon': '//cdn.weatherapi.com/weather/64x64/night/122.png', 'code': 1009}, 'wind_mph': 9.4, 'wind_kph': 15.1, 'wind_degree': 60 , 'wind_dir': 'ENE', 'pressure_mb': 1016.0, 'pressure_in': 30.01, 'precip_mm': 0.0, 'precip_in': 0.0, 'humidity': 93, 'cloud': 100, 'feelslike_c': 18.9 , 'feelslike_f': 66.0, 'vis_km': 11.0, 'vis_miles': 6.0, 'uv': 1.0, 'gust_mph': 10.1, 'gust_kph': 16.2, 'air_quality': {'co': 260.3999938964844, 'no2 ': 17.0, 'o3': 1.100000023841858, 'so2': 6.5, 'pm2_5': 4.0, 'pm10': 5.800000190734863, 'us-epa-index': 1, 'gb-defra-ind 例如'：1}}}

在将城市保存到数据库之前，如何使用“代码：1006”过滤该城市是否存在？

代码如果城市不存在则工作正常但如果添加正确的城市则显示关键错误

如果我添加存在的城市但如果我尝试添加一个不存在的城市，代码 B工作，显示 Eror 键错误条件

from django.shortcuts import render
import requests
from .models import City
from .forms import CityForm

# Create your views here.

def index (request):
    url = 'http://api.weatherapi.com/v1/current.json?key=403d3701b46c42a2bac104734221012&q={}&aqi=yes'
    if request.method == 'POST':
        form = CityForm(request.POST)
        if form.is_valid():
            new_city = form.cleaned_data['name']
            existing_city_count= City.objects.filter(name = new_city).count()
            if existing_city_count ==0:
                r=requests.get(url.format(new_city)).json()
                
                #Code A ___________
                #error_code = r['error']['code'] == 1006:
                #if error_code = 1006:
                    #print("City does not exist")
                #else:
                    #form.save()
                    
                #Code B _____________   
                #right_code = r['current']['condition']['code']
                #if right_code is not 1006:
                    #form.save()
                #else:
                    #print("city does not exist")
            else:
                err_msg = "City Already exist in the database"
    
    
    form = CityForm()
    cities = City.objects.all()
    wd = []
    for city in cities:
        r = requests.get(url.format(city)).json()
        cw ={
            'city' : r['location']['name'],
            'temp' : r['current']['temp_c'],
            'desc' : r['current']['condition']['text'],
            'icon' :r['current']['condition']['icon'],
            'code' : r['current']['condition']['code'],
            }
        wd.append(cw)
        #print(wd)
    
    context = { 'cw':wd, 'addform': form}
    
    return render(request, 'wa/index.html', context)

Answer 1

首先，您必须检查它是错误案例还是成功案例作为天气 API 的响应，然后您可以相应地处理这些案例。 我没有在下面的代码中使用 try catch，您可以进一步更新以使其更健壮，我也将数据库中的城市存在检查从计数更改为存在，因为这是更有效的方法。 请检查我在此处提到的详细信息的评论部分，并随时连接所需的任何进一步详细信息。 如果我的回答对您有帮助，请点赞谢谢，祝您编码愉快：！ :)

from django.shortcuts import render
from .forms import CityForm
import requests
from .models import City

# Create your views here.
def index(request):
    url = 'http://api.weatherapi.com/v1/current.json?key=403d3701b46c42a2bac104734221012&q={}&aqi=yes'
    if request.method == 'POST':
        code=''
        form = CityForm(request.POST)
        if form.is_valid():
            new_city = form.cleaned_data['city']
            # existing_city_count= City.objects.filter(city = new_city).count() remove count and used exist to check whether a city exist in database or not as exist is more efficient that count
            if not City.objects.filter(city = new_city).exists():
                r=requests.get(url.format(new_city)).json()
                #Code A ___________
                if 'error' in r:#checking the key error exist  in response from get  or not
                    code = r['error']['code']
                #Code B _____________   
                if 'current' in r: #checking the key current exist  in result  or not
                    code =  r['current']['condition']['code']

                if code != 1006: #checking if code is not 1006 save city to database
                    form.save()      
                else:
                    print("city does not exist")
            else:
                err_msg = "City Already exist in the database"
            return render(request,'index.html',{'form':CityForm()})
    else:
       return render(request,'index.html',{'form':CityForm()})