Python django表单处理和执行行为跳过执行

Question

我在 python django 中处理表单时遇到一些问题。处理表单时出现一些异常行为。下面是我的表单和在视图中处理表单的部分函数。我对 python 和 django 相当陌生，所以任何帮助将不胜感激。

class SearchForm(forms.Form):
     pr_name = forms.CharField(label="Pr Name", max_length=64, required=False)
     org = forms.ModelChoiceField(queryset=Org.objects.all(), required=False)
     group_name = forms.CharField(label="Unique Submission Name", max_length=64, required=False)
     group_ref = forms.CharField(label="Ref", max_length=12, required=False)
     group_url = forms.URLField(label="URL", required=False)

def search(request):
    if request.method == 'POST':
        form = SearchForm(request.POST)
        if form.is_valid():
            p_ids = []
            g_ids = []
            f_ids = []

        logging.debug('hello1')
        # Filter first
        firstQuery = 'SELECT * FROM pr where '
        pr_name = form.cleaned_data['pr_name']
        if pr_name:
            logging.debug('hello2')
            firstQuery += '(name like \'%' + pr_name + '%\')'
        else:
            pass

        logging.debug('hello3')
        org = form.cleaned_data['org']
        if org:
            org = Org.objects.get(name = org)
            org_id = org.id
            firstQuery += '(org_id = ' + str(org_id) + ')'
        else:
            pass

        firstQuery = firstQuery.replace(')(', ') AND (')
        logging.debug('First query: %s' % firstQuery)
        p_search_results = P.objects.raw(firstQuery)
        logging.debug('First query: %s' % p_search_results)
        for x in p_search_results:
            p_ids.append(x.id)
        logging.debug('p_ids: %s' % p_ids)


        # Filter Group
        secondQuery = 'SELECT * FROM group where '
                group_name = form.cleaned_data['group_name']
        if group_name:
            secondQuery += '(name like \'%' + group_name + '%\')'
        else:
            pass

        group_ref = form.cleaned_data['group_ref']
        if group_ref:
            secondQuery += '(ref like \'%' + group_ref + '%\')'
        else:
            pass

        group_url = form.cleaned_data['group_url']
        if group_url:
            secondQuery += '(method_url like \'%' + group_url + '%\')'
        else:
            pass

        secondQuery = secondQuery.replace(')(', ') AND (')
        logging.debug('Second query: %s' % secondQuery)
        group_search_results = PredictionGroup.objects.raw(secondQuery)
        logging.debug('Second query: %s' % group_search_results)
        for x in group_search_results:
            g_ids.append(x.id)
        logging.debug('g_ids: %s' % g_ids)

...
...
...

当我在表单中输入 pr_name 并提交时，视图会输入第一个 if 语句，在控制台中打印出“hello1”和“hello2”，但会跳过“hello3”并跳过第二个 if 语句并向前跳至 secondaryQuery = secondaryQuery.replace(')(', ') AND (')

调试输出为：

DEBUG hello1
DEBUG hello2

错误为：

UnboundLocalError at /search/
local variable 'secondQuery' referenced before assignment

Traceback:
File "/Library/Python/2.7/site-packages/django/core/handlers/base.py" in get_response
  111.                         response = callback(request, *callback_args, **callback_kwargs)
File ".../views.py" in search
  209.          secondQuery = secondQuery.replace(')(', ') AND (')

Exception Type: UnboundLocalError at /search/
Exception Value: local variable 'secondQuery' referenced before assignment

预期输出：

DEBUG hello1
DEBUG hello2
DEBUG hello3
DEBUG First query: SELECT * FROM pr where .... (firstQuery)
DEBUG First query: .....  (p_search_results)

Answer 1

难道在你的源代码中混合了空格和制表符，并且你认为应该执行的代码块实际上没有执行，因为它位于“if”语句内？