我正在使用Python(3.6)和Django(2.1)开发一个项目,在其中需要实现搜索功能。我有两个搜索字段what
和where
。
用户可以为这两个字段输入多个值,并用,
分隔它们,然后在用,
分割后,我需要检查两个字段的长度。当字段为空时,其长度应为0
,但就我而言,即使字段为空,也表明其长度为1
。
这是我的代码: 从forms.py:
class FetchDataForm(forms.Form):
what = forms.CharField(max_length=256, required=True)
where = forms.CharField(max_length=256, required=False)
class Meta:
fields = ('what', 'where')
来自templates / search.html:
<form method="POST" action="{% url 'udata:fetch-data' %}">
{% csrf_token %}
<div class="form-row">
<div class="form-group col-md-5">
<label for="inputEmail4" style="font-size: x-large">What:</label>
<br><span class="help"
style="font-size: smaller; padding-top: 0%;"> keywords, or company</span>
{% if dd.what %}
<input type="text" name="what" value="{{ dd.what }}" class="form-control" id="inputEmail4">
{% else %}
<input type="text" name="what" class="form-control" id="inputEmail4">
{% endif %}
</div>
<div class="form-group col-md-5">
<label for="inputEmail4" style="font-size: x-large">Where:</label>
<br><span class="help"
style="font-size: smaller; padding-top: 0%;">City, State or Zip code</span>
{% if dd.where %}
<input type="text" name="where" value="{{ dd.where }}" class="form-control"
id="inputPassword4">
{% else %}
<input type="text" name="where" value="" class="form-control" id="inputPassword4">
{% endif %}
</div>
<label for="inputPassword4"> </label>
<br><span class="help" style="font-size: smaller;"> </span>
<div class="form-group col-md-2">
<button type="submit" class="btn btn-primary btn-lg" style="margin-top:10%">Search</button>
</div>
</div>
</form>
然后 来自views.py:
what = form.cleaned_data['what']
where = form.cleaned_data['where']
get_len_what = len(what.split(','))
get_len_where = len(where.split(','))
print('What len is {}'.format(get_len_what))
print('where len is {}'.format(get_len_where))
即使字段为空,它也会将长度打印为1
。
这里有什么问题吗?
答案 0 :(得分:0)
这是一个可行的解决方案:
what = form.cleaned_data['what']
if ',' not in what and len(what) > 0:
get_len_what = len(what.split(','))
elif ',' in what and len(what) > 0:
get_len_what = len(what.split(','))
else:
get_len_what = len(what.split(',')) - 1
而且,我们可以为另一个where
实现相同的功能。