小编use*_*539的帖子

我有一个简单的目录结构：

proj/
    src/
        __init__.py
        foo.py
        bar.py
    test/
        __init__.py
        test_foo.py

测试_foo.py

import unittest

import sys
sys.path.append('../src')

from src import foo

class TestFoo(unittest.TestCase):

  def test_foo(self):
    foo.start()


if __name__ == '__main__':
    unittest.main()

foo.py

import bar

def start():
  bar.do_stuff()

运行测试时（我使用 vscode），出现以下错误：

Failed to import test module: test_foo
Traceback (most recent call last):
  File "~/.pyenv/versions/3.8.6/lib/python3.8/unittest/loader.py", line 436, in _find_test_path
    module = self._get_module_from_name(name)
  File "~/.pyenv/versions/3.8.6/lib/python3.8/unittest/loader.py", line 377, in _get_module_from_name
    __import__(name)
  File "~/proj/test/test_foo.py", line 6, in <module>
    from src import foo
  File "~/proj/src/foo.py", line 1, in <module> …

我在这里使用AngularFire2版本的代码,我用它来从我的一个组件上的数据库中获取一些成员.

当我在同一个组件中调用此注销时,我遇到了问题.我取消订阅订阅但我仍然在控制台中收到错误说Exception was thrown by user callback. Error: permission_denied at /users/uid.我知道这是因为我不再登录,我的数据库规则不允许这种读取操作.如果我已经取消订阅,我不知道为什么它还在尝试读取数据.

    constructor(private afAuth: AngularFireAuth, private db: AngularFireDatabase) {
        this.user = afAuth.authState;

        this.userSub = this.user.subscribe(auth => {
            if (auth) {
                this.member = db.object('/users/' + auth.uid);
                this.dbSub = this.member.subscribe();
            }
        });
    }

    logout() {
        this.dbSub.unsubscribe();
        this.userSub.unsubscribe();

        this.afAuth.auth.signOut()
            .then(() => this.router.navigateByUrl('/login'));
    }

我正在使用模拟数据和 InMemoryDbService，如英雄之旅示例所示。当我不传递 HttpParams 时，加载数据工作正常。添加参数后，我会收到 500 响应，正文中包含以下错误：{error: "collection.filter is not a function"}我已使用 get 请求中的数据填充表，如下所示：

组件代码：

@Component({
  selector: 'app-adapter',
  templateUrl: './adapter.component.html',
  styleUrls: ['./adapter.component.css']
})
export class AdapterComponent implements OnInit {
  dataSource = new MatTableDataSource<Request>();
  @ViewChild(MatSort) sort: MatSort;
  @ViewChild(MatPaginator) paginator: MatPaginator;
  constructor(private api: BaseServiceApi) {}

  ngOnInit() {
    this.refresh(); // this works with no params and populates my table
  }

  refresh(params?) {
    this.getRequests(params)
      .subscribe(reply => {
          this.dataSource.data = reply.payload as Request[];
          this.dataSource.sort = this.sort;
          this.dataSource.paginator = this.paginator;
          this.pageSize = this.paginator.pageSize;
        }
      ); …

我正在尝试采用这样的对象数组

[
  {
    "id": "uniqueParentId1",
    "children": [
      {
        "childProp1": "test1",
        "childProp2": "test3"
      }
    ]
  },
  {
    "id": "uniqueParentId2",
    "children": [
      {
        "childProp1": "somevals",
        "childProp2": "other vals"
      },
      {
        "childProp1": "somevals 1",
        "childProp2": "other vals 1"
      }
    ]
  }
]

并返回所有子项组合而成的数组，每个子对象都有一个附加值，即父项的“ id”。

以上示例，结果。

[
  {
    "parentId": "uniqueParentId1",
    "childProp1": "test1",
    "childProp2": "test3"
  },
  {
    "parentId": "uniqueParentId2",
    "childProp1": "somevals",
    "childProp2": "other vals"
  }
  {
    "parentId": "uniqueParentId2",
    "childProp1": "somevals 1",
    "childProp2": "other vals 1"
  }
]

我只是不确定如何解决这个问题。我熟悉数组的展平和数组。但是我只能在不添加parentId的情况下将输出作为原始子项的数组获得