Question

我有一个django 1.6.11表格（views.py）：

def posneg_nlp(request):
sys_project_name = request.GET.get('project', 'graph') # here oll is ok, it can get correct project value
success = False
monitoring_words = ''
pos_features = ''
neg_features = ''
date_saved = datetime(2015, 7, 29)

print('posneg_nlp form')
print("posneg_nlp request.GET.get('sys_project_name', 'graph')", request.GET.get('project', 'graph'))

if request.method == 'POST':
    posnegnlp_form = PosnegnlpForm(request.POST)
    if posnegnlp_form.is_valid():
        print('posneg_nlp form is_valid')
        success = True
        sys_project_name = sys_project_name
        # here it cannot get project value, it replaced with default:
        print("posneg_nlp form is_valid request.GET.get('sys_project_name', 'graph')", request.GET.get('project', 'graph')) 
        print("sys_project_name ", sys_project_name)
        monitoring_words = posnegnlp_form.cleaned_data['monitoring_words']
        pos_features = posnegnlp_form.cleaned_data['pos_features']
        neg_features = posnegnlp_form.cleaned_data['neg_features']
        print('pos_features:', pos_features, 'neg_features:', neg_features)

        posneg_nlp_filter(sys_project_name, pos_features, neg_features, db_collection=Vkwallpost)
        #get_likes_wallposts_by_owner_id(typeobject='post', owner_id=None, item_id=None, filter_posts='likes')


else:
    posnegnlp_form = PosnegnlpForm()
    success = False

ctx = {'posnegnlp_form': posnegnlp_form, 'sys_project_name': sys_project_name, 'monitoring_words': monitoring_words,
       'pos_features': pos_features, 'neg_features': neg_features, 'success': success}
return render_to_response('choose_nlp_filter.html', ctx, context_instance = RequestContext(request))

这是两个中的第二种形式。从第一个表单开始，我通过模板将变量 sys_project_name 传递给此表单：

                                <div class="rowSubmit">
                                <a style="outline: medium none;" hidefocus="true" href="{{ DOMAIN_URL }}/post/choose_nlp_filter/?project={{ sys_project_name }}" class="btn btn-right"><span class="gradient">К шагу 2. Выбор фильтров&nbsp;</span></a>

                            </div>

当我在表单函数 posneg_nlp（请求）上打印 sys_project_name 的当前值时，它显示正确的值 request.GET.get（＆＃39; project＆＃39;，＆＃39; graph＆＃39;）等于graph2（在表单呈现时发生）。但之后 if posnegnlp_form.is_valid（）：后停止查看它并 request.GET.get（＆＃39; project＆＃39;，＆＃39; graph＆＃39; ）显示未找到的值，等于＆＃34; graph＆＃34;。

那么，如何传递变量而不允许重写呢？

Answer 1

在第一种情况下，视图正在响应http GET请求，因此request.GET包含您的项目参数。提交表单时，现在视图响应了http POST请求，request.POST包含表单数据。在后一种情况下，如果您希望request.GET仍然包含'project'参数，那么您可以通过表单标记中的form action参数传递它：

form action =“/ some / url /？project = {{sys_project_name}}”

Django：如何在表单提交上传递变量

1 个答案: