小编Joh*_*ohn的帖子

我有一个名为aaa的应用程序,在aaa的models.py中,我喜欢:

from django.db import models
from django.contrib.auth.models import User

class BBB(models.Model):
    user = models.OneToOneField(User)
    newsletter=models.BooleanField(default=False)

我添加到我的setting.py

AUTH_PROFILE_MODULE = 'aaa.BBB'

然后我去django shell并输入

>>> from django.contrib.auth.models import User
>>> a=User.objects.get(id=1)
>>> a.get_profile()
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/local/lib/python2.6/dist-packages/Django-1.2.5-py2.6.egg/django/contrib/auth/models.py", line 373, in get_profile
    self._profile_cache = model._default_manager.using(self._state.db).get(user__id__exact=self.id)
  File "/usr/local/lib/python2.6/dist-packages/Django-1.2.5-py2.6.egg/django/db/models/query.py", line 347, in get
    % self.model._meta.object_name)
DoesNotExist: BBB matching query does not exist.

有些人有想法有什么不对吗？编辑:我做manage.py syncdb

我的插件中有以下代码:

    @Override
    void apply(Project project) {

        project.extensions.create(EXTENSION,TestExtension)

        project.task("task1") << {
            println "Task 1"
            println(project.mmm.test)
            def extension = project.extensions.findByName(EXTENSION)
            println(extension.test)
        }

        project.task("task2",type: TestTask) {
            println "Task 2 "
            def extension = project.extensions.findByName(EXTENSION)
//            conventionMapping.test = {extension.test}
//            println(project.extensions.findByName(EXTENSION).test)
//            test = "test"

        }
    }

在任务1中,extension.test返回正确的值.但是在task2 extension.test中总是返回null.我做错了什么？有没有更好的方法将一些扩展值作为任务的输入传递？我在Mac上使用gradle 1.12和jdk 1.8.最好的祝福

编辑:正确的版本:

   project.task("task2", type: TestTask) {
        project.afterEvaluate {
            def extension = project.extensions.findByName(EXTENSION)
            println(project.extensions.findByName(EXTENSION).test)
            test = project.extensions.findByName(EXTENSION).test
        }
    }

我刚开始使用Spring 3 MVC,我目前正在使用3.2.4.RELEASE.我用Spring工具套件创建了基本项目,并添加了Hibernate和mysql的配置.这是我添加到servelet-context的代码:

<!-- Resolves views selected for rendering by @Controllers to .jsp resources in the /WEB-INF/views directory -->
<beans:bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <beans:property name="prefix" value="/WEB-INF/views/" />
    <beans:property name="suffix" value=".jsp" />
</beans:bean>

<!-- package where to search for components -->
<context:component-scan base-package="xxx.xxx.xxx" />


<beans:bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
    <beans:property name="dataSource" ref="dataSource"/>
    <beans:property name="packagesToScan" value="xxx.xxx.xxx"/>
    <beans:property name="hibernateProperties">
        <beans:props>
            <beans:prop key="hibernate.hbm2ddl.auto">update</beans:prop>
            <beans:prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</beans:prop>
            <beans:prop key="hibernate.show_sql">true</beans:prop>
        </beans:props>
    </beans:property>
</beans:bean>

<!-- default data source for application -->
<beans:bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <beans:property name="driverClassName" value="com.mysql.jdbc.Driver"/>
    <beans:property name="url" value="jdbc:mysql://localhost/test"/>
    <beans:property name="username" …

我尝试迭代列表中的每个项目.但迭代器不会遍历所有对象.这是我的功能代码(dirs和root来自os.walk)

def remove_hidden_dirs(dirs,root):
    """
    Function remove hidden directories . .. in unix
    """
    logging.debug("\n\n remove hidden" )
    logging.debug('Start removing hidden dirs for %s',root)
    logging.debug("Length of dirs %s",len(dirs))
    logging.debug('File list before removing')
    dirs.sort()
    for d in dirs:
        logging.debug(d)
    i=0
    for d in dirs:
        i=i+1
        logging.debug("Iterating over %s",d)
        if d[0:1] == '.' or d[0:2] =='..':
            dirs.remove(d)
            logging.debug("Dir %s is being removed because of being hidden dir",d)
        else:
            logging.debug("Dir %s is NOT being removed because of being hidden dir",d)
    logging.debug("Iterate on %s", i) …

我有一个问题是为我的模型添加自定义方法.我在django书中找到了解决方案,但它不起作用.这是我的模型代码

class NewsManager(models.Manager):
    def getLastNews(self):
        return self.objects.order_by('-id')[:3]

class News(models.Model):
    title=models.SlugField()
    shortBody=models.CharField(max_length=250)
    fullBody=models.TextField()
    author=models.ForeignKey(User)

现在我跑去python manage.py shell打字

from news.models import *
News.objects.getLastNews()
...
Attribute error Manager object have no attribute getLastNews

我在哪里犯了错误？
顺便说一句,这是从模型获取信息并将其传递给视图的好方法吗？