我在 Google App Engine 上使用 Django-nonrel。我正在尝试向数据库中添加一行，但在尝试使用 save() 时出现此错误:
invalid literal for int() with base 10
这是我的代码:
View .py
from django import forms
from django.contrib.auth.decorators import login_required
from django.contrib.auth.forms import UserCreationForm
from django.http import HttpResponseRedirect
from django.shortcuts import render_to_response
from forms import SayForm
from models import Saying, Category
import datetime
def say_something(request):
if request.method == 'POST':
form = SayForm(request.POST)
if form.is_valid():
cd = form.cleaned_data
content = cd['content']
category_temp = "Uncategorized"
category = Category.objects.get(name = category_temp)
added_date = datetime.datetime.now()
added_user = request.user
saying = Saying(content, category, added_date, added_user)
saying.save()
return HttpResponseRedirect('/contribute/success')
else:
form = SayForm()
return render_to_response('say_form.html', {'form' : form})
模型.py
from django.db import models
from django.contrib.auth.models import User
class Category(models.Model):
name = models.CharField(max_length = 50)
def __unicode__(self):
return self.name
class Saying(models.Model):
content = models.CharField(max_length = 160)
category = models.ForeignKey(Category)
added_date = models.DateField()
added_user = models.ForeignKey(User)
表单.py
from django import forms
class SayForm(forms.Form):
content = forms.CharField(widget = forms.Textarea)
def clean_message(self):
content = self.cleaned_data['content']
num_characters = len(content)
if num_characters > 160:
raise forms.ValidationError("Please limit your saying to 160 characters only.")
num_words = len(content.split())
if num_words < 4:
raise forms.ValidationError("This doesn't make sense. Say something longer.")
return content
编辑:这是回溯
Traceback: File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/core/handlers/base.py" in get_response 107. response = callback(request, *callback_args, **callback_kwargs)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/contrib/auth/decorators.py" in _wrapped_view 25. return view_func(request, *args, **kwargs)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/core/views.py" in say_something 36. saying.save()
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/db/models/base.py" in save 452. self.save_base(using=using, force_insert=force_insert, force_update=force_update)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/db/models/base.py" in save_base 550. for f in meta.local_fields]
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/db/models/fields/subclassing.py" in inner 28. return func(*args, **kwargs)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/db/models/fields/subclassing.py" in inner 28. return func(*args, **kwargs)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/db/models/fields/init.py" in get_db_prep_save 280. return self.get_db_prep_value(value, connection=connection, prepared=False)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/db/models/fields/subclassing.py" in inner 53. return func(*args, **kwargs)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/db/models/fields/init.py" in get_db_prep_value 492. return connection.ops.value_to_db_auto(value)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/djangotoolbox/db/base.py" in value_to_db_auto 68. return super(NonrelDatabaseOperations, self).value_to_db_auto(value)
File "/home/eeyorexd/workspace/Python/appengine/something-to-say/somethingtosay/django/db/backends/init.py" in value_to_db_auto 485. return int(value)
Exception Type: ValueError at /contribute/ Exception Value: invalid literal for int() with base 10: 'test'
我的直觉告诉我，问题在于我如何将对象保存到数据库。也许外键部分？由于我最近才开始学习 Django，所以我无法确定问题所在。这个问题与使用 GAE 后端的 Django-nonrel 有什么关系吗？谁能告诉我哪里出了问题？
请您参考如下方法:
问题出在这里:
saying = Saying(content, category, added_date, added_user)
您忘记了 Django 会自动将 id 字段添加到模型定义中。如果您在 shell 中执行此操作，然后打印 saying.__dict__，您会看到内容已分配给 id，类别分配给 content 等等。
相反，在实例化模型时始终使用关键字参数:
saying = Saying(content=content,
category=category,
added_date=added_date,
added_user=added_user)
