小编Asu*_*sur的帖子

我按照快速入门指南安装了Clojurescript .

我把git repo拉到了~/clojurescript. CLOJURESCRIPT_HOME已设置~/clojurescript并clojurescript/bin添加到系统路径.

当我尝试使用命令时,cljsc我得到以下错误

Could not find or load main class clojure.main

我该如何解决？

我希望border radius从Bootstrap中的所有元素中删除.所以我创建custom-mixins.less并在其中放置了以下行,跳跃它将覆盖原始.border-radiusmixin但没有.

// Border Radius
.border-radius(@radius) {      
}

所以我尝试使用以下行作为实际工作的替代方案.

// Border Radius
.border-radius(@radius) {
  @radius : 0px;
  -webkit-border-radius: @radius;
     -moz-border-radius: @radius;
          border-radius: @radius;
}

我试过一些mixins http://less2css.org.似乎较少而不是覆盖mixins,将所有属性从后来的mixin追加到原始属性.有没有更清洁,更容易的解决方案????

我正在尝试从贝宝的授权 api 获取访问令牌。当我向 api 发出 post 请求时，我得到UNSUPPORTED_MEDIA_TYPE415 响应。

下面是我使用的片段。

const auth = await fetch(PAYPAL_OAUTH_API, {
    method: 'post',
    headers: {
        'Content-Type': 'application/json',
        'Authorization': `Basic ${ basicAuth }`
    },
    body: JSON.stringify({"grant_type": "client_credentials"})
});

我正在测试 step 函数的重试逻辑。理论上，如果失败，应该重试以下 step 函数以执行 lambda 3 次。

{
  "StartAt": "Bazinga",
  "States": {
    "Bazinga": {
      "Type": "Task",
      "Resource": "arn:aws:states:::lambda:invoke",
      "Parameters": {
        "FunctionName": "arn:aws:lambda:ap-southeast-2:518815385770:function:errorTest:$LATEST",
        "Payload": {
          "Input.$": "$"
        }
      },
      "Retry" : [
        {
          "ErrorEquals": [ "States.All", "States.Timeout" ],
          "IntervalSeconds": 1,
          "MaxAttempts": 3,
          "BackoffRate": 1.0
        }
      ],
       "Next": "Fail"
    },
    "Fail": {
      "Type": "Fail"
    }
  }
}

它调用的 lambda 设置为 3 秒后超时。lambda 冻结了 4 秒。这意味着 lambda 超时并抛出 States.Timeout错误。代码如下：

{
  "StartAt": "Bazinga",
  "States": {
    "Bazinga": {
      "Type": "Task",
      "Resource": "arn:aws:states:::lambda:invoke",
      "Parameters": …

ServerA 和 ServerB 是 Web 服务器。ServerA 希望与 ServerB 通信。ServerA 可以在相互身份验证期间使用其服务器证书作为客户端证书吗？

我想在 Github Actions 中运行数据库迁移。数据库位于堡垒后面。

我的解决方案是通过堡垒将 Postgres 端口 5432 转发到数据库主机。

我尝试了下面的脚本，但似乎不起作用。

mkdir ~/.ssh
ssh-keyscan -H <bastion_ip>  >> ~/.ssh/known_hosts
echo "${{secrets.BASTION_SSH_KEY}}" >> key
chmod 600 ./key
ssh -T -i ./key -L 5432:<db_host_url>:5432 user@<bastion_ip> &
make migrate
rm ./key

make migrate针对 运行迁移localhost:5432。

当我运行管道时出现以下错误

Error:  AssertionError [ERR_ASSERTION]: ifError got unwanted exception: connect ECONNREFUSED 127.0.0.1:5432

无论如何要修复它吗？我对其他方式持开放态度。

如何在不使用Function.prototype.bind的情况下将多个参数与事件对象一起传递给事件处理程序？

事件处理程序中有一个闭包.

以下基本代码不起作用,

Function.prototype.bind

function eventHandler(eventObj + arguments) {
  return function(){}; //a closure
}

我不知道如何将事件对象和其他参数同时传递给事件处理程序.

更新:

我甚至尝试在addEventListener中使用匿名函数.这样做,似乎控件从未到达回调函数内的闭包.

element.addEventListener("click", function(e){
    var data = {'event':e, 'args':arguments};
    eventHandler(data);
  }, false);

function eventHandler(data) {
  return function(){  //this function is never executed
    console.log(JSON.stringify(data));
  };
}

我正在访问这个奇怪的问题ManyToManyField.

我有以下型号.

class Link(models.Model):
    title = models.CharField(max_length = 200)
    url = models.URLField(unique = True)
    tags = models.ManyToManyField(Tag)
    creation_date = models.DateTimeField(auto_now_add = True)
    user = models.ForeignKey(User)
    likes = models.ManyToManyField(User, related_name = "%(app_label)s_%(class)s_user_likes")
    dis_likes = models.ManyToManyField(User, related_name = "%(app_label)s_%(class)s_user_dis_likes")

    class Meta:
        abstract = True

class URL(Link):
    preview_image = models.URLField()
    preview_heading = models.CharField(max_length = 100)
    preview_content = models.CharField(max_length = 100)

当我尝试访问时URL.objects.get(pk=1).likes.all(),我收到Cannot resolve keyword '' into field. Choices are:...错误.

URL.objects.get(pk=1).tags.all(), URL.objects.get(pk=1).user和URL.objects.filter(likes=auser, pk=1)做工精细.

更新:

1. 字段likes …

我正在尝试通过 Terraform 配置 Aurora Serverless 数据库。我有以下设置。

resource "aws_rds_cluster" "auth-db-cluster" {
  cluster_identifier        = "auth-db-cluster"
  engine                    = "aurora-postgresql"
  engine_mode               = "serverless"
  engine_version            = "10.7"
  database_name             = "${var.auth_db_name}"
  master_username           = "${var.auth_db_user}"
  master_password           = "${var.auth_db_password}"
  db_subnet_group_name      = "${aws_db_subnet_group.rds-subnet-group.id}"
  vpc_security_group_ids    = ["${aws_security_group.rds-security-group.id}"]
  skip_final_snapshot       = true
  final_snapshot_identifier = "Ignore"
}

resource "aws_rds_cluster_instance" "cluster_instances" {
  count              = 1
  identifier         = "auth-db-cluster-instance"
  cluster_identifier = "${aws_rds_cluster.auth-db-cluster.id}"
  instance_class     = "db.t3.micro"
}

Terraform 失败将出现以下错误：

• aws_rds_cluster.auth-db-cluster：创建 RDS 集群时出错：InvalidParameterValue：您请求的引擎模式无服务器当前不可用。状态代码：400，请求 ID：7d8bcb5b-0c41-4498-853d-5c6cfd491dd8

I have two iframes from the same domain, which are hosted in document from another domain. The problem is these iframes cannot communicate with each other through postMessage. I cant even access the DOM of iframe1 from iframe2 even though they belong to same domain. Is there any solution ????

I used following options to refer the required iframe.

parent.frame[x]

I tried following lines to access DOM of iframes

parent.frame[x].contentWindow returns null,

parent.frame[x].document.getElementsByTagName("body") returns null

Update:

I guess my question …