在Django中将视图从字典传递并查看到模板 [英] Pass and View Dictionary from view to template in django

问题描述

我正在将字典传递给视图，但是现在它显示在页面上. 在通过之前，我也已经将字典打印了，并且它在屏幕上完美地打印了整个字典.但是当我将其传递给html页面时，它根本不显示.

view.py

def show_log_messages(request):
    context = RequestContext(request)
    log_dictionary = {}
    count = 0
    e = log_messages.objects.filter(log_status='Queue').values('sent_to', 'unique_arguments')
    count = 0
    logs = {}
    for d in e:
        count +=1
        new_dict = {'email': d["sent_to"], 'log_id': d["unique_arguments"]}
        logs[count] = new_dict

    for keys in logs:
        print logs[keys]['log_id']
        print logs[keys]['email']


    return render_to_response('show_logs.html', logs, context)

show_logs.html

{% if logs %}
        <ul>
            {% for log in logs:  %}
                {% for keys in log  %}
            <li>{{ log[keys]['email'] }}</li>
            {% endfor %}
        </ul>
    {% else %}
        <strong>There are no logs present.</strong>
    {% endif %}

它仅显示标题，而不显示列表元素.

解决方案

您的代码非常不符合Python和undjango.您应该将列表而不是字典传递给模板.

shortcuts.render比render_to_response更易于使用.

def show_log_messages(request):
    messages = log_messages.objects.filter(log_status='Queue') \
                                   .values('sent_to', 'unique_arguments')
    logs = [{'email': msg['sent_to'], 'log_id': msg['unique_arguments']}
                       for msg in messages]    
    return render(request, 'show_logs.html', {'logs': logs})

模板:

{% if logs %}
    <ul>
        {% for log in logs %}
            <li>{{ log.email }} - {{ log.log_id }}</li>
        {% endfor %}
    </ul>
{% else %}
    <strong>There are no logs present.</strong>
{% endif %}

BTW，logs列表在这里是不必要的.您可以将messages查询集直接传递到模板中，并在<li>标记中显示{{ log.sent_to }}和{{ log.unique_arguments }}.

I am passing the dictionary to the view but it is now showing on the page. i also have print the dictionary on the before passing, and it prints the whole dictionary on the screen perfectly. but when i pass it to the html page, it does not show at all..

view.py

def show_log_messages(request):
    context = RequestContext(request)
    log_dictionary = {}
    count = 0
    e = log_messages.objects.filter(log_status='Queue').values('sent_to', 'unique_arguments')
    count = 0
    logs = {}
    for d in e:
        count +=1
        new_dict = {'email': d["sent_to"], 'log_id': d["unique_arguments"]}
        logs[count] = new_dict

    for keys in logs:
        print logs[keys]['log_id']
        print logs[keys]['email']


    return render_to_response('show_logs.html', logs, context)

show_logs.html

{% if logs %}
        <ul>
            {% for log in logs:  %}
                {% for keys in log  %}
            <li>{{ log[keys]['email'] }}</li>
            {% endfor %}
        </ul>
    {% else %}
        <strong>There are no logs present.</strong>
    {% endif %}

it only show the heading not the list element.

解决方案

Your code is very unpythonic and undjango. You should pass to template a list instead of dictionary.

Also shortcuts.render is much simpler to use than render_to_response.

def show_log_messages(request):
    messages = log_messages.objects.filter(log_status='Queue') \
                                   .values('sent_to', 'unique_arguments')
    logs = [{'email': msg['sent_to'], 'log_id': msg['unique_arguments']}
                       for msg in messages]    
    return render(request, 'show_logs.html', {'logs': logs})

Template:

{% if logs %}
    <ul>
        {% for log in logs %}
            <li>{{ log.email }} - {{ log.log_id }}</li>
        {% endfor %}
    </ul>
{% else %}
    <strong>There are no logs present.</strong>
{% endif %}

BTW, logs list is unnecessary here. You can pass messages queryset directly into template and show {{ log.sent_to }} and {{ log.unique_arguments }} in the <li> tag.

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