如何保存在数据库中的Django模型的数据? [英] how to save data in the db django model?
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问题描述
美好的一天,我真的不能明白我在做什么错在这里。我用这个功能基本视图存储与Django模型数据库废我的数据,但现在它不保存任何更多。我真的不能明白为什么。任何想法?
高清weather_fetch(要求):
上下文=无
corrected_rainChance =无
URL ='http://weather.news24.com/sa/cape-town
extracted_city = url.split('/')[ - 1]
城市= extracted_city.replace(' - ',)
打印(市)
url_request =的urlopen(URL)
汤= BeautifulSoup(url_request.read(),'html.parser')
city_list = soup.find(ID =ctl00_WeatherContentHolder_ddlCity)
city_as_on_website = city_list.find(文= re.compile(市,如re.I))。父
cityId = city_as_on_website ['值']
json_url =http://weather.news24.com/ajaxpro/TwentyFour.Weather.Web.Ajax,App_$c$c.ashx 标题= {
内容类型:text / plain的;字符集= UTF-8,
主机:weather.news24.com',
原产地:http://weather.news24.com',
引用站点:URL,
用户代理:Mozilla的/ 5.0(X11; Linux的i686的)为AppleWebKit / 537.36(KHTML,例如Gecko)Ubuntu的铬/ 48.0.2564.82铬/ Safari浏览器48.0.2564.82 / 537.36',
X-AjaxPro的法':'GetCurrentOne'} 有效载荷= {
cityId:cityId
}
request_post = requests.post(json_url,标题=标题,数据= json.dumps(负载))
数据=应用re.sub(R新日期\\(日期\\ .UTC \\((\\ d +),(\\ D +),(\\ D +),(\\ D +),(\\ D +),(\\ D +),(\\ D +)\\)\\),convert_date,request_post.text)
数据= data.strip(; / *)
数据= json.loads(数据)
预测数据= ['预测']
如果预测[降雨] =='*':
rainChance = 0
corrected_rainChance = rainChance
其他:
尝试:
OBJ = WeatherData.objects.get_or_create(
min_temp =预测[LowTemp],HIGH_TEMP =预测[HighTemp],
日期=预测[日] = WIND_SPEED预测[风速],雨= corrected_rainChance
)
除了WeatherData.DoesNotExist:
OBJ = WeatherData.objects.get_or_create(
min_temp =预测[LowTemp],HIGH_TEMP =预测[HighTemp],
日期=预测[日] = WIND_SPEED预测[风速],
雨= corrected_rainChance
)
obj.save()
上下文= {语境:OBJ}
打印(上下文)
返回渲染(请求,forecastApp /页/ fetch_weather.html',上下文)类WeatherData(models.Model):
日期= models.DateTimeField(默认值= timezone.now)
WIND_SPEED = models.DecimalField(max_digits = 3,decimal_places = 1)
HIGH_TEMP = models.DecimalField(max_digits = 3,decimal_places = 1)
min_temp = models.DecimalField(max_digits = 3,decimal_places = 1)
雨= models.IntegerField(默认值为0) 高清__str __(个体经营):
回报'。加入(STR([self.date.month,self.date.day,self.date.year]))
解决方案
有肯定是有问题,你的尝试/除
块。娱您code ++工程,直到创建对象,则应在该部分更改为:
如果预测[降雨] =='*':
rainChance = 0
corrected_rainChance = rainChance
其他:
OBJ = WeatherData.objects.get_or_create(
min_temp =预测[LowTemp],HIGH_TEMP =预测[HighTemp],
日期=预测[日] = WIND_SPEED预测[风速],雨= corrected_rainChance
)
#obj.save() - >你不需要再次保存obj的。
上下文= {语境:OBJ}
打印(上下文)
Good day, I can't really understand what I'm doing wrong in here. I was using this function base view to store my scrap data in the database with the django model, but now it's not saving any more. I can't really understand why. Any idea?
def weather_fetch(request):
context = None
corrected_rainChance = None
url = 'http://weather.news24.com/sa/cape-town'
extracted_city = url.split('/')[-1]
city = extracted_city.replace('-', " ")
print(city)
url_request = urlopen(url)
soup = BeautifulSoup(url_request.read(), 'html.parser')
city_list = soup.find(id="ctl00_WeatherContentHolder_ddlCity")
city_as_on_website = city_list.find(text=re.compile(city, re.I)).parent
cityId = city_as_on_website['value']
json_url = "http://weather.news24.com/ajaxpro/TwentyFour.Weather.Web.Ajax,App_Code.ashx"
headers = {
'Content-Type': 'text/plain; charset=UTF-8',
'Host': 'weather.news24.com',
'Origin': 'http://weather.news24.com',
'Referer': url,
'User-Agent': 'Mozilla/5.0 (X11; Linux i686) AppleWebKit/537.36 (KHTML, like Gecko) Ubuntu Chromium/48.0.2564.82 Chrome/48.0.2564.82 Safari/537.36',
'X-AjaxPro-Method': 'GetCurrentOne'}
payload = {
"cityId": cityId
}
request_post = requests.post(json_url, headers=headers, data=json.dumps(payload))
data = re.sub(r"new Date\(Date\.UTC\((\d+),(\d+),(\d+),(\d+),(\d+),(\d+),(\d+)\)\)", convert_date, request_post.text)
data = data.strip(";/*")
data = json.loads(data)
forecast = data['Forecast']
if forecast["Rainfall"] == '*':
rainChance = 0
corrected_rainChance = rainChance
else:
try:
obj = WeatherData.objects.get_or_create(
min_temp=forecast["LowTemp"], high_temp=forecast["HighTemp"],
date=forecast["Date"], wind_speed=forecast["WindSpeed"], rain=corrected_rainChance
)
except WeatherData.DoesNotExist:
obj = WeatherData.objects.get_or_create(
min_temp=forecast["LowTemp"], high_temp=forecast["HighTemp"],
date=forecast["Date"], wind_speed=forecast["WindSpeed"],
rain=corrected_rainChance
)
obj.save()
context = {'context': obj}
print(context)
return render(request, 'forecastApp/pages/fetch_weather.html', context)
class WeatherData(models.Model):
date = models.DateTimeField(default=timezone.now)
wind_speed = models.DecimalField(max_digits=3, decimal_places=1)
high_temp = models.DecimalField(max_digits=3, decimal_places=1)
min_temp = models.DecimalField(max_digits=3, decimal_places=1)
rain = models.IntegerField(default=0)
def __str__(self):
return ' '.join(str([self.date.month, self.date.day, self.date.year]))
解决方案
There is definitely a problem with your try/except
block. Amusing your code works until the object creation, you should change that part to:
if forecast["Rainfall"] == '*':
rainChance = 0
corrected_rainChance = rainChance
else:
obj = WeatherData.objects.get_or_create(
min_temp=forecast["LowTemp"], high_temp=forecast["HighTemp"],
date=forecast["Date"], wind_speed=forecast["WindSpeed"], rain=corrected_rainChance
)
# obj.save() --> you don't need to save the obj again.
context = {'context': obj}
print(context)
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