小编You*_*wad的帖子

我试图通过对另一个类属性执行操作来动态设置类属性.我的代码是这样的

class LastActionModel(BaseModel):
    """
    Provides created_by updated_by fields if you have an instance of user,
    you can get all the items, with Item being the model name, created or updated
    by user using user.created_items() or user.updated_items()
    """
    created_by = models.ForeignKey(
        settings.AUTH_USER_MODEL, blank=True, null=True,
        related_name = lambda self:'%s_%s' %('created', \
            self._meta.verbose_name_plural.title().lower())
    )
    updated_by = models.ForeignKey(
        settings.AUTH_USER_MODEL, blank=True, null=True,
        related_name = lambda self:'%s_%s' %('updated', \
            self._meta.verbose_name_plural.title().lower())
    )

    class Meta:
        abstract = True

这是为了动态设置相关名称,以便对于类Item和用户'user',我可以轻松调用user.created_items.all().

这给了我错误

super(ForeignObject, self).contribute_to_class(cls, name, virtual_only=virtual_only)
    File "/home/pywebapp/venv/local/lib/python2.7/site-packages/django/db/models/fields/related.py", line 113, …

我正在使用python 2.7.10构建一个新的amazon实例作为默认值.在我运行了我的机器配置脚本并且真相到来之后,芹菜给了我一个导入,所以我调试了问题给billard.

包看起来是正确的路径,即

sudo find -name "billiard"
./srv/ia-live/lib64/python2.7/dist-packages/billiard

其中ia-live是我的virtualenv的道路.检查via python virtualenv可执行文件中的路径

import sys
sys.path

['',
 '/srv/ia-live/bin',
 '/srv/ia-live/src/django-devserver-redux-master',
 '/usr/lib/python2.7',
 '/srv/ia-live/local/lib64/python2.7/site-packages',
 '/srv/ia-live/local/lib/python2.7/site-packages',
 '/srv/ia-live/lib64/python2.7',
 '/srv/ia-live/lib/python2.7',
 '/srv/ia-live/lib64/python2.7/site-packages',
 '/srv/ia-live/lib/python2.7/site-packages',
 '/srv/ia-live/lib64/python2.7/lib-dynload',
 '/srv/ia-live/local/lib/python2.7/dist-packages',
 '/srv/ia-live/local/lib/python2.7/dist-packages',
 '/srv/ia-live/lib/python2.7/dist-packages',
 '/usr/lib64/python2.7',
 '/usr/lib/python2.7',
 '/srv/ia-live/local/lib/python2.7/dist-packages/IPython/extensions',
 '/home/ec2-user/.ipython']

这似乎是正确的,但当我这样做

import billiard
ImportError: No module named billiard

我不明白为什么会有问题

目前的行为是什么？

我正在尝试获得自定义类型的观察值

export interface ConfigurationState {
  outlet_id: number;
  api_key: string;
}

在我的组件中

@Component({
  selector: 'retail-root',
  templateUrl: './root.component.html',
  styleUrls: ['./root.component.scss']
})
export class RootComponent implements OnInit {
  public config$: Observable<ConfigurationState>;

  constructor(private store: Store<fromRoot.State>) {
    this.config$ = this.store.select(fromRoot.getConfigState);
    this.config$.subscribe(data => console.log(data));
   }

  ngOnInit() {
    console.log(this.config$);
    this.store.dispatch(new configActions.GetConfig());
  }

}

当我使用如下

{{ config$ | async }}

它给了我，[object Object]但是如果订阅了，this.config$.subscribe(data => console.log(data));我可以在控制台中得到正确的对象。

谁能帮忙？

我想用django使用gulp-useref.我的所有注入脚本都工作正常,注入后进行手动路径更新,但现在我想连接我注入的脚本.这是我的HTML

  <!-- build:css({compile/serve,src}) styles/vendor.css -->
  <!-- bower:css -->
  <link rel="stylesheet" href="{{ STATIC_URL }}dash/bower_components/angular-material/angular-material.css" />
  <link rel="stylesheet" href="{{ STATIC_URL }}dash/bower_components/nvd3/src/nv.d3.css" />
  <!-- endbower -->
  <!-- endbuild -->

  <!-- build:css({compile/serve,src}) styles/app.css -->
  <!-- inject:css -->
  <link rel="stylesheet" href="{{ STATIC_URL }}dash/compile/serve/styles/main.css">
  <!-- endinject -->
  <!-- endbuild -->

和

  <!-- build:js(src) scripts/vendor.js -->
  <!-- bower:js -->
  <script src="{{ STATIC_URL }}dash/bower_components/angular/angular.js"></script>
  <script src="{{ STATIC_URL }}dash/bower_components/angular-animate/angular-animate.js"></script>
  <script src="{{ STATIC_URL }}dash/bower_components/angular-cookies/angular-cookies.js"></script>
  <script src="{{ STATIC_URL }}dash/bower_components/angular-touch/angular-touch.js"></script>
  <script src="{{ STATIC_URL }}dash/bower_components/angular-sanitize/angular-sanitize.js"></script>
  <script src="{{ STATIC_URL }}dash/bower_components/angular-resource/angular-resource.js"></script>
  <script src="{{ STATIC_URL }}dash/bower_components/angular-route/angular-route.js"></script> …