Django 迁移：只有部分模型成功迁移到sql

Question

请看我的模型和表格。(Python 2.7)。运行 python manage.py迁移后，只有"company"和"region"成功出现在数据库中。

显示错误: 键入错误预期字符串或缓冲区

我曾经尝试手动添加数据库中的列，但是表单的数据无法保存到数据库中。

请帮助查明此迁移问题的原因。在此先感谢您的帮助。

models.py

from django import forms
from django.forms import ModelForm
from django.db import models
from dupont.models import Result
from datetime import date
from django.forms import widgets

class Input(models.Model):
    company=models.CharField(max_length=100)
    region=models.CharField(max_length=100)
    supply_chain=models.CharField(max_length=100)
    uom=models.CharField(max_length=100)
    start_date=models.DateField(auto_now=False, auto_now_add=False)
    end_date=models.DateField(auto_now=False, auto_now_add=False)

    def __unicode__(self):
        return self.company

forms.py

from django import forms
from django.forms import ModelForm
from .models import Input
from dupont.models import Result
from django.contrib.auth.models import User,Group
from datetimewidget.widgets import DateTimeWidget, DateWidget, TimeWidget
from django.forms import widgets
from functools import partial
from django.forms.util import ErrorList

DateInput = partial(forms.DateInput, {'class': 'datepicker'})

class InputForm(forms.ModelForm):
    company=forms.CharField(widget=forms.TextInput, label="Company",error_messages={'required': 'Please enter the company name'},required=True)
    regionlist = forms.ModelChoiceField(queryset=Result.objects.values('region').distinct())
    sc_list=forms.ModelChoiceField(queryset=Result.objects.values('supply_chain').distinct())
    uom=forms.CharField(required=True)
    start_date=forms.DateField(widget=DateInput())
    end_date = forms.DateField(widget=DateInput())
    error_css_class='error'
    required_css_class = 'required'


    class Meta:
        model = Input
        fields = ('company', 'region','supply_chain','uom','start_date','end_date')
        widgets = {
            'start_date': forms.DateInput(attrs={'class':'datepicker'}),
            'end_date': forms.DateInput(attrs={'class':'datepicker'}),
        }

错误

  File "manage.py", line 10, in <module>
    execute_from_command_line(sys.argv)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\core\managem
ent\__init__.py", line 338, in execute_from_command_line
    utility.execute()
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\core\managem
ent\__init__.py", line 330, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\core\managem
ent\base.py", line 393, in run_from_argv
    self.execute(*args, **cmd_options)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\core\managem
ent\base.py", line 444, in execute
    output = self.handle(*args, **options)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\core\managem
ent\commands\migrate.py", line 221, in handle
    executor.migrate(targets, plan, fake=fake, fake_initial=fake_initial)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\migration
s\executor.py", line 110, in migrate
    self.apply_migration(states[migration], migration, fake=fake, fake_initial=f
ake_initial)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\migration
s\executor.py", line 148, in apply_migration
    state = migration.apply(state, schema_editor)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\migration
s\migration.py", line 115, in apply
    operation.database_forwards(self.app_label, schema_editor, old_state, projec
t_state)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\migration
s\operations\fields.py", line 62, in database_forwards
    field,
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\backends\
mysql\schema.py", line 43, in add_field
    super(DatabaseSchemaEditor, self).add_field(model, field)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\backends\
base\schema.py", line 384, in add_field
    definition, params = self.column_sql(model, field, include_default=True)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\backends\
base\schema.py", line 146, in column_sql
    default_value = self.effective_default(field)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\backends\
base\schema.py", line 211, in effective_default
    default = field.get_db_prep_save(default, self.connection)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\models\fi
elds\__init__.py", line 710, in get_db_prep_save
    prepared=False)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\models\fi
elds\__init__.py", line 1322, in get_db_prep_value
    value = self.get_prep_value(value)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\models\fi
elds\__init__.py", line 1317, in get_prep_value
    return self.to_python(value)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\db\models\fi
elds\__init__.py", line 1274, in to_python
    parsed = parse_date(value)
  File "C:\Python27\lib\site-packages\django-1.8.3-py2.7.egg\django\utils\datepa
rse.py", line 60, in parse_date
    match = date_re.match(value)
TypeError: expected string or buffer

Answer 1

也许你应该检查你的form's data，看起来它们不是正确的日期数据。

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