我製作了一個網頁,向api提交請求,該API根據用戶在窗體中提供的參數返回關於Concert之旅信息的JSON對象。我能夠成功獲取JSON並解析它。數據的結構是一組Concert對象,其中包含有關場地,日期,地點等信息,我將其解析並保存到列表(正在工作)中。然後,我需要能夠在視圖對應的模板中將這些列表顯示爲列表(格式化爲Stubhub或Ticketmaster中的音樂會)。在Django模板上下文中保存變量時出錯
爲此,我想我可以將每個列表作爲變量存儲在模板的上下文字典中,因爲我已經使用字面字符串進行了操作。出於某種原因,當我嘗試這個我得到Exception Value: local variable 'form_artistSelect' referenced before assignment
以下代碼:
def search(request):
form = SearchForm(request.POST or None)
if form.is_valid():
form_artistSelect = urllib2.quote(form.cleaned_data.get("artist_select"))
form_city = urllib2.quote(form.cleaned_data.get("city"))
form_state = urllib2.quote(form.cleaned_data.get("state"))
mile_radius = urllib2.quote(form.cleaned_data.get("radius"))
#print "testing"
url = "http://api.bandsintown.com/events/search?artists[]=" + form_artistSelect + "&location=" +form_city+","+ form_state+"&radius="+ mile_radius + "&format=json&app_id=YOUR_APP_ID"
data = json.load(urllib2.urlopen(url))
#titles = [ i.get("title") for i in data]
raw_dts = [str(i.get("datetime")) for i in data]
#formatted_dts = [i.get("formatted_datetime") for i in data]
ticket_urls = [str(i.get("ticket_url")) for i in data]
ticket_statuses = [str(i.get("ticket_status")) for i in data]
venue_names = [str(i.get("venue").get("name")) for i in data]
venue_cities = [str(i.get("venue").get("city")) for i in data]
venue_region = [str(i.get("venue").get("region")) for i in data]
context = {
"form_artistSelect" : form_artistSelect,
"raw_dts" : raw_dts,
"ticket_urls" : ticket_urls,
"ticket_statuses" : ticket_statuses,
"venue_names" : venue_names,
"venue_cities" : venue_cities,
"venue_region" : venue_region,
"form" : form
}
return render(request,"searchform.html" , context)
爲什麼會造成這種方法有問題?如果這不是將解析數據從響應傳遞到模板的正確方法,那麼我應該如何去做呢?