ValueError:没有足够的值可解包(预期2,得到1) [英] ValueError: not enough values to unpack (expected 2, got 1)
问题描述
以下是我的代码
views.py
from django.shortcuts import render
from .forms import MedicineForm
from .models import Medicine
def index(request):
all_medicine = Medicine.objects.order_by('id')
return render(request, 'medicine/index.html', {'all_medicine': all_medicine})
def add(request):
if request.method == 'POST':
form = MedicineForm(request.POST)
if form.is_valid():
new = Medicine()
new.name = form.cleaned_data['药品名称']
new.price = form.cleaned_data['药品价格']
new.number = form.cleaned_data['药品编号']
new.sort = form.cleaned_data['药品分类']
new.unit = form.cleaned_data['计价单位']
new.save()
return render(request, 'medicine/index.html')
else:
form = MedicineForm()
return render(request, 'medicine/add.html', {'form': form},)
forms.py
forms.py
from django import forms
class MedicineForm(forms.Form):
药品编号 = forms.IntegerField()
药品名称 = forms.CharField(max_length=100)
药品价格 = forms.IntegerField()
jj_choice = {
'瓶': '瓶',
'包': '包',
'盒': '盒',
}
计价单位 = forms.ChoiceField(
choices=jj_choice
)
药品分类 = forms.CharField(max_length=100)
add.html:
add.html:
{% extends 'polls/index.html' %}
{% block medicine_form %}
<form action="http://localhost:8000/medicine/add/" method="post">
{% csrf_token %}
{{ form }}
<input type="submit" value="添加药品" />
</form>
{% endblock %}
回溯:
traceback:
文件 E:\p\lib\site-packages\django\内部
39中的核心\处理程序\exception.py。response = get_response(request)
File "E:\p\lib\site-packages\django\core\handlers\exception.py" in inner 39. response = get_response(request)
文件 E:\p\lib _get_response
187中的 site-packages django core handlers base.py。response = self.process_exception_by_middleware(e,request)
File "E:\p\lib\site-packages\django\core\handlers\base.py" in _get_response 187. response = self.process_exception_by_middleware(e, request)
_get_response
185中的文件 E:\p\lib\site-packagesdjango\core\handlers\base.py。response = wrapd_callback(request,* callback_args, ** callback_kwargs)
File "E:\p\lib\site-packages\django\core\handlers\base.py" in _get_response 185. response = wrapped_callback(request, *callback_args, **callback_kwargs)
文件 F:\ddjj\x\mysite\medicine\views.py中添加
25。return render(request,'medicine / add.html',{'form':form},)
File "F:\ddjj\x\mysite\medicine\views.py" in add 25. return render(request, 'medicine/add.html', {'form': form},)
文件 E:\p\lib\site-包\django $ shortcuts.py在渲染
30中。content = loader.render_to_string(template_name,context,request,usin g = using)
File "E:\p\lib\site-packages\django\shortcuts.py" in render 30. content = loader.render_to_string(template_name, context, request, using=using)
render_to_string $ b中的文件 E:\p\lib\site-packages\django\template\loader.py $ b 68. return template.render(context,request)
File "E:\p\lib\site-packages\django\template\loader.py" in render_to_string 68. return template.render(context, request)
文件 E:\p\lib\site-packages\django\template\ renderbackendsbdjango.py渲染
66。return self.template.render(context)
File "E:\p\lib\site-packages\django\template\backends\django.py" in render 66. return self.template.render(context)
文件 E:\p\lib渲染
208中的站点包 django模板 base.py。返回self._render(context)
File "E:\p\lib\site-packages\django\template\base.py" in render 208. return self._render(context)
文件 E :_pender
199中的:\p\lib\site-packages\django\template\base.py。return self.nodelist.render(context)
File "E:\p\lib\site-packages\django\template\base.py" in _render 199. return self.nodelist.render(context)
渲染
994中的文件 E:\p\lib\site-packages\django\template\base.py。bit = node.render_annotated(context)
File "E:\p\lib\site-packages\django\template\base.py" in render 994. bit = node.render_annotated(context)
render_annotated
961中的文件 E:\p\lib\site-packages\django\template\base.py。return self.render(context)
File "E:\p\lib\site-packages\django\template\base.py" in render_annotated 961. return self.render(context)
文件 E:\p\lib\s渲染
174中的ite-packages\django rendertemplate\loader_tags.py。返回generate_parent._render(context)
File "E:\p\lib\site-packages\django\template\loader_tags.py" in render 174. return compiled_parent._render(context)
文件 E:\ _render
199中的 p\lib\site-packages\django\template\base.py。return self.nodelist.render(context)
File "E:\p\lib\site-packages\django\template\base.py" in _render 199. return self.nodelist.render(context)
文件 E:
994中。bit = node.render_annotated(context)File "E:\p\lib\site-packages\django\template\base.py" in render 994. bit = node.render_annotated(context)
render_annotated
961中的文件 E:\p\lib\site-packages\django\template\base.py。返回自身。 render(context)
File "E:\p\lib\site-packages\django\template\base.py" in render_annotated 961. return self.render(context)
渲染$ b中的文件 E:\p\lib\site-packages\django\template\loader_tags.py $ b70。结果= block.nodelist.render(上下文)
File "E:\p\lib\site-packages\django\template\loader_tags.py" in render 70. result = block.nodelist.render(context)
文件 E:\p\lib\site-packages\django\template渲染
994中的 base.py。bit = node.render_annotated(context)
File "E:\p\lib\site-packages\django\template\base.py" in render 994. bit = node.render_annotated(context)
文件 E:\p\lib\site -packages\django\template\base.py ender_annotated
961。return self.render(context)
File "E:\p\lib\site-packages\django\template\base.py" in render_annotated 961. return self.render(context)
File E:\p\lib\site-packages\django\template渲染
1050中的 base.py。返回render_value_in_context(输出,上下文)
File "E:\p\lib\site-packages\django\template\base.py" in render 1050. return render_value_in_context(output, context)
文件 E:\p\lib\site-在render_value_in_context
1028中打包django\template\base.py。value = force_text(value)
File "E:\p\lib\site-packages\django\template\base.py" in render_value_in_context 1028. value = force_text(value)
文件 E:\p\ \lib\site-packages\django\utils\encoding.py in force_text
76。s = six.text_type(s)
File "E:\p\lib\site-packages\django\utils\encoding.py" in force_text 76. s = six.text_type(s)
391中的文件 E:\p\lib\site-packages\django\utils\html.py。klass。 str = lambda self:mark_safe( klass_str(self))
File "E:\p\lib\site-packages\django\utils\html.py" in 391. klass.str = lambda self: mark_safe(klass_str(self))
文件 E:\p\lib\site-packages\django\forms\forms.py > str
123.返回self.as_table()
File "E:\p\lib\site-packages\django\forms\forms.py" in str 123. return self.as_table()
文件 E:\p\lib\site-packages\ django\forms\forms.py在as_table
271中。errors_on_separate_ro w = False)
File "E:\p\lib\site-packages\django\forms\forms.py" in as_table 271. errors_on_separate_row=False)
_html_output $ b中的文件 E:\p\lib\site-packages\django\forms\forms.py $ b226。字段:six.text_type(bf),
File "E:\p\lib\site-packages\django\forms\forms.py" in _html_output 226. 'field': six.text_type(bf),
文件 E:\p\lib\site-packages\django\ utils\html.py in
391。klass。 str = lambda self:mark_safe(klass_str(self))
File "E:\p\lib\site-packages\django\utils\html.py" in 391. klass.str = lambda self: mark_safe(klass_str(self))
str
43中的文件 E:\p\lib\site-packages\django\forms\boundfield.py。return self.as_widget()
File "E:\p\lib\site-packages\django\forms\boundfield.py" in str 43. return self.as_widget()
as_widget
101中的文件 E:\p\lib\site-packages\django\forms\boundfield.py。return force_text (widget.render(name,self.value(),attrs = attrs))
File "E:\p\lib\site-packages\django\forms\boundfield.py" in as_widget 101. return force_text(widget.render(name, self.value(), attrs=attrs))
文件 E:\p\lib\site-packages\ django\forms\widgets.py在渲染
537中。options = self.render_options([value])
File "E:\p\lib\site-packages\django\forms\widgets.py" in render 537. options = self.render_options([value])
文件 E:\p render_options
560中的 libsitesitepackagesdjangoformswidgets.py,用于self.choic中的option_value,option_label es:
File "E:\p\lib\site-packages\django\forms\widgets.py" in render_options 560. for option_value, option_label in self.choices:
异常类型:/ medicine / add /
的ValueError异常值:没有足够的值可以解包(预期2,得到1)
Exception Type: ValueError at /medicine/add/ Exception Value: not enough values to unpack (expected 2, got 1)
推荐答案
jj_choice = {
'瓶': '瓶',
'包': '包',
'盒': '盒',
}
应写为
jj_choice = (
('瓶', '瓶'),
('包', '包'),
('盒', '盒'),
)
键,文本元组。
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