小编Tom*_*ers的帖子

我想使用RavenDb 4.0.0-beta-40018查询包含动态属性的实体,但我不确定如何操作.

class Foo {
    public int Id { get; set; }
    public DateTime CreatedAt { get; set; }
    public string Name { get; set; }
    public dynamic Attributes { get; set; }
}

{
    "Attributes": {
        "IsFeatured": true
    },
    "CreatedAt": "2017-08-30T15:53:21.1881668Z",
    "Name": "Featured Foo"    
}

这是我试图使用的查询.

const string propertyName = "IsFeatured";

var results = session.Query<Foo>()
        .Where(x => x.Attributes != null)
        .Where(x => x.Attributes[propertyName] != null)
        .Where(x => x.Attributes[propertyName] == true);

遗憾的是,我甚至无法编译此代码,因为我收到编译错误(Error: An expression tree may not contain a …

正如您在下面的图片中看到的那样,它对我不起作用.模板html出现在表格上方,而不是我预期的标题下方.

我要做的是创建一个可用于表数据的可选过滤器组件.添加组件时,它应在标题列下方显示一个额外的行,其中包含输入/按钮,允许您将过滤器放在特定列上.

所以显然我做错了什么,或者做了一些我不应该做的事情.如果是这样,我该如何正确地注入filter-table组件的模板？

我的app.html.

   <table class="table table-bordered table-striped">
        <thead>
            <tr>
                <th></th>
                <th>Name</th>
                <th>City</th>
                <th>Username</th>
                <th>Email</th>
                <th>Nationality</th>
            </tr>
            <table-filter containerless></table-filter>
        </thead>
        <tbody>
            <tr>
                <td>??</td>
                <td>Name</td>
                <td>City</td>
                <td>Username</td>
                <td>Email</td>
                <td>Nationality</td>
            </tr>
        </tbody>
    <table>

我的table-filter组件.

// Viewmodel
@customElement('table-filter')
export class TableFilterComponent {
    // Nothing here    
}

// Template
<template>
    <tr>
        <th>Filter header 1</th>
        <th>Filter header 2</th>
        <th>Filter header 3</th>
        <th>Filter header 4</th>
        <th>Filter header 5</th>
        <th>Filter header 6</th>
    </tr>
</template>

我试图通过运行以下命令在我的Windows Server(2012 R2)上运行dotnet核心api(2.1.0):dotnet Api.dll但我不断收到以下消息.

The specified framework 'Microsoft.AspNetCore.App', version '2.1.0' was not found.
  - Check application dependencies and target a framework version installed at:
      C:\Program Files\dotnet\
  - Installing .NET Core prerequisites might help resolve this problem:
      http://go.microsoft.com/fwlink/?LinkID=798306&clcid=0x409
  - The .NET Core framework and SDK can be installed from:
      https://aka.ms/dotnet-download

当我使用相同的命令(dotnet Api.dll)时,api在我的mac上正常运行.当我使用时,dotnet --info我得到以下内容,并说它安装了最新的Runtime和SDK.

Runtime Environment:
 OS Name:     Windows
 OS Version:  6.3.9600
 OS Platform: Windows
 RID:         win81-x64
 Base Path:   C:\Program Files\dotnet\sdk\2.1.300\

Host (useful for support):
  Version: …

我正在尝试运行我的sphinx服务器的索引器.

这是我使用的命令(通过root访问)来启动索引:

indexer --all

当我使用命令时,这是我得到的反应:

Sphinx 2.1.9-id64-release (rel21-r4761)
Copyright (c) 2001-2014, Andrew Aksyonoff
Copyright (c) 2008-2014, Sphinx Technologies Inc (http://sphinxsearch.com)

using config file '/etc/sphinxsearch/sphinx.conf'...
FATAL: no indexes found in config file '/etc/sphinxsearch/sphinx.conf'

这是位于的sphinx.conf文件 /etc/sphinxsearch/

#############################################################################
## indexer settings
#############################################################################

indexer
{
    # memory limit, in bytes, kiloytes (16384K) or megabytes (256M)
    # optional, default is 32M, max is 2047M, recommended is 256M to 1024M
    mem_limit       = 1024M
}

#############################################################################
## searchd settings
#############################################################################

searchd
{
    listen          = 127.0.0.1:9312
    listen          = …

我试图从dotnet核心web api操作下载一个zip文件,但我无法使其工作.我尝试通过POSTMAN和我的Aurelia Http Fetch Client调用该操作.

我能够像我想要的那样创建ZipFile并将其存储在系统上,但无法修复它,因此它通过api返回zip文件.

用例:用户选择几个图片集并单击下载按钮.图片集的ID被发送到api并创建一个zipfile,其中包含用于保存图片的每个图片集的目录.该zipfile返回给用户,以便他/她可以将其存储在他们的系统上.

任何帮助,将不胜感激.

我的控制器动作

      /// <summary>
      /// Downloads a collection of picture collections and their pictures
      /// </summary>
      /// <param name="ids">The ids of the collections to download</param>
      /// <returns></returns>
      [HttpPost("download")]
      [ProducesResponseType(typeof(void), (int) HttpStatusCode.OK)]
      public async Task<IActionResult> Download([FromBody] IEnumerable<int> ids)
      {
           // Create new zipfile
           var zipFile = $"{_ApiSettings.Pictures.AbsolutePath}/collections_download_{Guid.NewGuid().ToString("N").Substring(0,5)}.zip";

           using (var repo = new PictureCollectionsRepository())
           using (var picturesRepo = new PicturesRepository())
           using (var archive = ZipFile.Open(zipFile, ZipArchiveMode.Create))
           {
                foreach (var id in ids)
                {
                     // Fetch …

我有一个 dotnet 核心 api，它返回一个 FileContentResult ..

return new FileContentResult(bytes, contentType)
{
    FileDownloadName = Path.GetFileName(request.Filename)
};

通过邮递员，我可以完美地读出图像。现在我想通过 aurelia fetch 客户端读取图像，并将其显示在我的 html 视图中。这是我从api检索图像的功能。

public image(filename: string) {
    return this.http.fetch(AppConfiguration.base_url + 'assets/image',
        {
            method: 'post',
            body: json({
                filename: filename
            })
        });
}

我尝试使用此值转换器转换响应中的 blob。但我不能让它工作

转换器：

export class BlobToUrlValueConverter {
    public toView(blob) {
        return URL.createObjectURL(blob);
    }
}

视图模型：

export class Dashboard {

    public blob: any;

    constructor(
        public assets_service: AssetsService
    ) { }

    async attached() {
        let response = await this.assets_service.image('test.png');
        this.blob = response.blob();
    } …