django自定義模板過濾器變量作爲參數

我正在使用Django自定義模板過濾器描述here來訪問我的模板中的3D數組中的條目。我將3D數組swipeData從views.py傳遞給index.html。django自定義模板過濾器變量作爲參數

的index.html：

function getNearestHalfHourTimeString() { 
    var now = new Date(); 
    var hour = now.getHours(); 
    var minutes = now.getMinutes(); 
    var ampm = "AM"; 
    if (minutes < 15) { 
     minutes = "00"; 
    } else if (minutes < 45){ 
     minutes = "30"; 
    } else { 
     minutes = "00"; 
     ++hour; 
    } 
    return("T" + hour + minutes); 
}  

var currentDay = (new Date()).getDay(); 
var currentTimeRounded = getNearestHalfHourTimeString(); 

{% block content %} 
{% load hello_extras %} 
    var atrium = {{swipeData|bldIndex:'ATRIUMCAFE'|dayIndex:currentDay|timeIndex:currentTimeRounded }}; 
{% endblock %}

hello_extras.py：

from django import template 

register = template.Library() 

@register.filter 
def bldIndex(List, strIndex): 
    dctBuild = {'ATRIUMCAFE':0, 'BUTLERCOLLEGE':1, 'CAFEVIVIAN':2, 'CENTERFORJEWISHLIFE':3, 'CHANCELLORGREEN':4, 'CHEMISTRYCAFE':5, 'CONCESSIONS_12':6, 'FORBESCOLLEGE':7, 'FRISTCSTORE':8, 'FRISTGALLERY1':9, 'FRISTGALLERY2':10, 'FRISTGALLERY3':11, 'FRISTGALLERY4':12, 'FRISTWITHERSPOONS':13, 'GRADUATECOLLEGE':14, 'LIBRARY_CART':15, 'MATHEYCOLLEGE':16, 'ROCKEFELLERCOLLEGE':17, 'STUDIO34BUTLEREMPORIUM':18, 'WHITMANCOLLEGE':19, 'WILSONCOLLEGE':20, 'WOODROWWILSONCAFE':21, 'FIRESTONELIBRARY':22} 
    i = int(dctBuild.get(strIndex)) 
    return List[i] 

@register.filter 
def dayIndex(List, strIndex): 
    return List[int(strIndex)] 

@register.filter 
def timeIndex(List, strIndex): 
    dctTime = { "T0000":0, "T0030":1, "T0100":2, "T0130":3, "T0200":4, "T0230":5, "T0300":6, "T0330":7, "T0400":8, "T0430":9, "T0500":10, "T0530":11, "T0600":12, "T0630":13, "T0700":14, "T0730":15, "T0800":16, "T0830":17, "T0900":18, "T0930":19, "T1000":20, "T1030":21, "T1100":22, "T1130":23, "T1200":24, "T1230":25, "T1300":26, "T1330":27, "T1400":28, "T1430":29, "T1500":30, "T1530":31, "T1600":32, "T1630":33, "T1700":34, "T1730":35, "T1800":36, "T1830":37, "T1900":38, "T1930":39, "T2000":40, "T2030":41, "T2100":42, "T2130":43, "T2200":44, "T2230":45, "T2300":46, "T2330":47} 
    i = int(dctTime.get(strIndex)) 
    return List[i]

我得到的錯誤

VariableDoesNotExist at/
Failed lookup for key [currentDay] in u"[{

我如何使用一個變量作爲參數傳遞給我的自定義模板過濾？我已經嘗試過使用塊。

來源

2017-05-04 ech19

你的問題是，你正在嘗試一個JS變種傳遞給Django的過濾器，這是錯誤的

CURRENTDAY和currentTimeRounded是JS瓦爾而不是Python乏，爲此過濾器失敗

記住你能得到您的視圖中的所有必要的信息，然後在你的模板

渲染，我建議你，你的格式在您的視圖和模板數據將其分配到各自的JS變種

有的跟隨

def some_view(request): 
    # here you can calculate, convert, create all values to your chart as you need 
    # if you need time or date can use datetime module ie 

    values_to_chart = "" 

    render(request, template_name, locals())

且模板中

var atrium = {{values_to_chart}}

來源

2017-05-05 03:12:02

django自定義模板過濾器變量作爲參數

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