Python Django抛出ValueError:在不更改代码的情况下解包的值太多（预期为2个）

我在子文件夹中编写了一个新函数，我的django项目运行良好，现在抛出以下错误：

 File "C:\Users\me\PycharmProjects\IndicatorAnalyserWebapp\Analyser\Indicators\urls.py", line 4, in <module>
    from .views import (
  File "C:\Users\me\PycharmProjects\IndicatorAnalyserWebapp\Analyser\Indicators\views.py", line 15, in <module>
    from .forms import IndicatorForm, SearchForIndicatorMetaData
  File "C:\Users\me\PycharmProjects\IndicatorAnalyserWebapp\Analyser\Indicators\forms.py", line 24, in <module>
    class IndicatorForm(forms.ModelForm):
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\forms\models.py", line 252, in __new__
    opts.field_classes)
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\forms\models.py", line 166, in fields_for_model
    formfield = f.formfield(**kwargs)
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\db\models\fields\__init__.py", line 1873, in formfield
    return super(IntegerField, self).formfield(**defaults)
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\db\models\fields\__init__.py", line 872, in formfield
    defaults['choices'] = self.get_choices(include_blank=include_blank)
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\db\models\fields\__init__.py", line 802, in get_choices
    for choice, __ in choices:
ValueError: too many values to unpack (expected 2)

forms.py

调用模型

指示符

，但是这与上次提交时的情况没有改变。我选择的所有字段都是元组，因此不应抛出此错误。如有任何建议，将不胜感激

编辑-同时添加模型

class Indicator(models.Model):
    time_periods = (
        get_time_periods()
    )

    months = (
        get_months()
    )

    calculations = (
        get_calculations()
    )

    sex_ids = (
        get_all_sexes()
    )

    age_ids = (
        get_all_ages()
    )

    operands = (
       ('+', '+'),
       ('-', '-'),
       ('*', '*'),
       ('/', '/')
    )

    salt_options = get_salt_options_as_tuple()

    qof_data_choices = (
        ('qof-{}-prev-ach-exc-ms-prac.xlsx', 'Musculoskeletal group'),
        ('qof-{}-prev-ach-exc-neu-prac.xlsx', 'Mental health and neurology group'),
        ('qof-{}-prev-ach-exc-fer-obs-gyn-prac.xlsx', 'Fertility, obstetrics and gynaecology group'),
        ('qof-{}-prev-ach-exc-hd-prac.xlsx', 'High dependency and other long term conditions group'),
        ('qof-{}-prev-ach-exc-ls-prac.xlsx', 'Lifestyle group'),
        ('qof-{}-prev-ach-exc-resp-prac.xlsx', 'Respiratory group'),
        ('qof-{}-prev-ach-exc-cv-prac.xlsx', 'Cardiovascular group'),
        ('qof-{}-prac-dom-ach.xlsx', 'Achievement group'),
        ('qof-{}-prac-dom-exc.xlsx', 'Exclusion group'),
    )

    id = models.IntegerField(unique=True, primary_key=True)
    source_data_family = models.ForeignKey(IndicatorFamily, on_delete=models.CASCADE, blank=True)
    qof_source_data = models.CharField(max_length=100, choices=qof_data_choices, blank=True)
    source_sheet = models.CharField(max_length=200, blank=True)
    year_range = models.CharField(max_length=2, blank=True)
    time_period = models.CharField(max_length=30, choices=time_periods, blank=True)
    ageId = models.IntegerField(choices=age_ids, blank=True)
    sexId = models.IntegerField(choices=sex_ids)
    calculation = models.CharField(max_length=30, choices=calculations, blank=True)
    rate = models.IntegerField(blank=True, null=True)
    value_declared_independently = models.BooleanField(default=False)
    value_column_name = models.CharField(max_length=200, blank=True)
    numerator_starts_with_financial_year = models.BooleanField(default=False)
    numerator = models.CharField(max_length=200, blank=True)
    salt_numerator = models.CharField(max_length=200, blank=True, choices=salt_options)
    salt_numerator_operand = models.CharField(max_length=2, choices=operands, blank=True)
    salt_numerator_2 = models.CharField(max_length=200, blank=True, choices=salt_options)
    numerator_minus_not_caseness = models.BooleanField(default=False)
    iapt_q_m_variable_type = models.CharField(max_length=200, blank=True)
    iapt_q_m_variable_a = models.CharField(max_length=200, blank=True)
    iapt_q_m_variable_b = models.CharField(max_length=200, blank=True)
    iapt_q_m_variable_type_denominator = models.CharField(max_length=200, blank=True)
    iapt_q_m_variable_a_denominator = models.CharField(max_length=200, blank=True)
    iapt_q_m_variable_b_denominator = models.CharField(max_length=200, blank=True)
    denominator_starts_with_financial_year = models.BooleanField(default=False)
    denominator = models.CharField(max_length=200, blank=True)
    denominator_minus_not_caseness = models.BooleanField(default=False)
    denominator_source_sheet = models.CharField(max_length=200, blank=True)
    salt_denominator = models.CharField(max_length=200, blank=True, choices=salt_options)
    salt_denominator_operand = models.CharField(max_length=2, choices=operands, blank=True)
    salt_denominator_2 = models.CharField(max_length=200, blank=True, choices=salt_options)
    add_denominator_column = models.CharField(max_length=200, blank=True)
    additional_denominator_column_starts_with_financial_year = models.BooleanField(default=False)
    adjust_denominator_for_person_years = models.BooleanField(default=False)
    ccg_over_18_population_as_denominator = models.BooleanField(default=False)
    ccg_total_population_as_denominator = models.BooleanField(default=False)
    is_count = models.BooleanField(default=False)
    is_percentage = models.BooleanField(default=False)
    ccg_to_stp = models.BooleanField(default=False)
    gp_to_upper_tier_la = models.BooleanField(default=False)
    ccg_lookup_required = models.BooleanField(default=False)
    drop_depression = models.BooleanField(default=False)
    count_non_nulls = models.BooleanField(default=False)
    non_null_columns = models.CharField(max_length=300, blank=True)
    drop_eng_row = models.BooleanField(default=False)
    months_to_quarter = models.BooleanField(default=False)
    snapshot = models.BooleanField(default=False)
    asterisk_as_two = models.BooleanField(default=False)
    creator = models.ForeignKey(settings.AUTH_USER_MODEL, default=1)
    denominator_2_equals_denominator = models.BooleanField(default=False)
    do_not_suppress_small_numbers = models.BooleanField(default=False)
    numerator_is_num_minus_denom = models.BooleanField(default=False)
    stp_is_average_not_sum = models.BooleanField(default=False)
    mental_health_trust_geographies = models.BooleanField(default=False)
    filter_by = models.CharField(max_length=200, blank=True)
#    ld_denominator_source_file = models.CharField(max_length=100, choices=qof_data_choices, blank=True)

    def __str__(self):
        return str(self.id)

编辑2-更新的回溯：

  File "C:\Users\me\PycharmProjects\IndicatorAnalyserWebapp\Analyser\Indicators\urls.py", line 4, in <module>
    from .views import (
  File "C:\Users\me\PycharmProjects\IndicatorAnalyserWebapp\Analyser\Indicators\views.py", line 15, in <module>
    from .forms import IndicatorForm, SearchForIndicatorMetaData
  File "C:\Users\me\PycharmProjects\IndicatorAnalyserWebapp\Analyser\Indicators\forms.py", line 19, in <module>
    class IndicatorForm(forms.ModelForm):
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\forms\models.py", line 252, in __new__
    opts.field_classes)
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\forms\models.py", line 166, in fields_for_model
    formfield = f.formfield(**kwargs)
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\db\models\fields\__init__.py", line 1873, in formfield
    return super(IntegerField, self).formfield(**defaults)
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\db\models\fields\__init__.py", line 872, in formfield
    defaults['choices'] = self.get_choices(include_blank=include_blank)
  File "C:\Users\me\AppData\Local\Continuum\anaconda37\envs\py34\lib\site-packages\django\db\models\fields\__init__.py", line 802, in get_choices
    for choice, __ in choices:
ValueError: too many values to unpack (expected 2)

---

选项

应采用以下格式：

[
    (value_1, label_1),
    (value_2, label_2),
    ...
]

您需要修改代码，以将项目以2元组格式附加到列表中：

ids.append((indicator.id, indicator.id))

上面，

indicator.id

也是选择的标签。标签是django在选择选项时向用户显示的内容。您可能应该提供对象的名称，而不是普通id

---

注意：威廉的另一个答案对你的情况来说是一个更好的解决方案

我选择的所有字段都是元组，因此不应抛出此错误

它抛出一个错误，因为您在此处向表单中添加了一个字段，其中包含：

... = forms.ChoiceField(choices=get_indicator_ids())

---

但是选择字段必须是元组的元组，才能在@Willem Van Onsem回复。我已经实现了这些更改，但仍然得到相同的错误。@RustyBrain:那么可能仍然有一个字段的选项使用平面列表，而不是2元组列表。@RustyBrain:您确实删除了

\uuu init\uuu

函数中

ChoiceField

的构造，对吗？是的，我确实对整个课堂进行了注释，并用你的建议替换了它。@RustyBrain:看起来仍然有一些

选项字段

s等，以平面列表/元组作为选项。错误是否仍然位于

类指示符表单（forms.ModelForm）：

（在回溯中）？谢谢您的回答。如上所述，我已经尝试过了，但仍然得到相同的错误

ids.append((indicator.id, indicator.id))

... = forms.ChoiceField(choices=get_indicator_ids())

class IndicatorDropDown(forms.Form):

    indicators = forms.ModelChoiceField(queryset=Indicator.objects.all())