Django迁移：只有部分模型成功迁移到sql

Question

请参阅我的模型和表单（Python 2.7）。运行python manage.py迁移后，只有“公司”和“区域”成功出现在数据库中。

显示错误：错误类型预期字符串或缓冲区

我曾经尝试手动添加到数据库中的列，但随后的表单数据无法保存到数据库中。

请帮助查明此迁移问题的原因。预先感谢您的帮助。

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，看起来他们不是正确的日期数据。