小编Vic*_*ema的帖子

我正在使用Ruby on Rails 3.1预发行版.我喜欢使用PostgreSQL,但问题是安装pggem.它给了我以下错误:

$ gem install pg
Building native extensions.  This could take a while...
ERROR:  Error installing pg:
    ERROR: Failed to build gem native extension.

        /home/u/.rvm/rubies/ruby-1.9.2-p0/bin/ruby extconf.rb
checking for pg_config... no
No pg_config... trying anyway. If building fails, please try again with
 --with-pg-config=/path/to/pg_config
checking for libpq-fe.h... no
Can't find the 'libpq-fe.h header
*** extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for …

我想WHILE在SQL Server 2005中使用无限循环,并BREAK在某些条件下使用关键字退出.

while true不起作用,所以我必须使用while 1=1.有没有更好的方法来组织无限循环？

我知道我可以使用goto,但在while 1=1 begin ... end结构上看起来更好.

我正在将原始JSON插入到集合中,并发现存储在数据库中的内容缺少值.例如,我的集合是BsonDocuments的集合:

_products = database.GetCollection<BsonDocument>("products");

将JSON插入集合的代码:

public int AddProductDetails(JObject json)
{
    var doc = json.ToBsonDocument(DictionarySerializationOptions.Document);
    _products.Insert(doc);
}

传入的JSON如下所示:

{"Id":1,"Tags":["book","database"],"Name":"Book Name","Price":12.12}

但是,集合中持久存在的只是没有值的属性.

{
  "Id": 1,
  "Tags": [
    "book",
    "database"
  ],
  "Name": "Book Name",
  "Price": 12.12
}

为什么值被删除？

突然,当我p4 info在终端中运行时,我注意到客户端root没有设置(不确定为什么它突然被取消设置.以下是输出显示"客户端未知"代替客户端root.通过什么命令通过我可以设置相同吗？我尝试过p4 client,p4 set但可能是错误的语法.

BANL121b92746:Applications bagarwal2$ p4 info
User name: bagarwal2
Client name: BANL121b92746
Client host: BANL121b92746.local
Client unknown.
Current directory: /Applications

此客户端根目录的值与我在连接 - >编辑工作区下的P4V客户端中设置的"工作空间根"相同.我的P4V客户端工作正常.p4 info当我的Intellij IDEA开始在P4中显示连接问题时,我发现了这个问题.在IDEA中测试连接时,下面是错误屏幕截图,与我p4 info在终端中的操作相同.

关于我的p4settings.txt配置,下面是几个月来一直工作的配置:

P4HOST=<hidden hostname>:2500
P4CLIENT=bagarwal2_BANL121b92746_trunk
P4USER=bagarwal2
P4POST=<hidden hostname>:2500

我的P4V连接(工作正常),使用上面提到的相同的细节/配置,我仍然在终端找到这个问题,因此在Intellij IDEA中.

我试图更新json结构中的"image_id"值.使用下面的命令,我怎么改ami-d8cf5cab到ami-a4df7gah现在为止,我已经试过这

cat cog.test.tfstate | jq -r '.modules[].resources[] | select(.type == "aws_launch_configuration") | select(.primary.attributes.name_prefix == "pmsadmin-lc-")'

JSON数据是

{
  "type": "aws_launch_configuration",
  "primary": {
    "id": "pmsadmin-lc-v47thk6rcrdgza6dujfzjatmju",
    "attributes": {
      "associate_public_ip_address": "false",
      "ebs_block_device.#": "0",
      "ebs_optimized": "false",
      "enable_monitoring": "true",
      "ephemeral_block_device.#": "0",
      "iam_instance_profile": "cog-test-pmsadmin",
      "id": "pmsadmin-lc-v47thk6rcrdgza6dujfzjatmju",
      "image_id": "ami-d8cf5cab",
      "instance_type": "t2.small",
      "key_name": "cog-test-internal",
      "name": "pmsadmin-lc-v47thk6rcrdgza6dujfzjatmju",
      "name_prefix": "pmsadmin-lc-",
      "root_block_device.#": "0",
      "security_groups.#": "4",
      "security_groups.1893851868": "sg-7ee7bf1a",
      "security_groups.2774384192": "sg-e2e7bf86",
      "security_groups.2825850029": "sg-86e6bee2",
      "security_groups.3095009517": "sg-f4e7bf90",
      "spot_price": "",
      "user_data": "ed03ac6642af8c97562b065c0b37f211b58ad0a2"
    }
  }
}