NotImplementedException当您定义一个带有您不想实现的方法的接口时,Golang 中是否有相当于在 Python 中引发 a 的方法?这是惯用的 Golang 吗?
例如:
type MyInterface interface {
Method1() bool
Method2() bool
}
// Implement this interface
type Thing struct {}
func (t *Thing) Method1() bool {
return true
}
func (t *Thing) Method2() bool {
// I don't want to implement this yet
}
Run Code Online (Sandbox Code Playgroud) 是否mysqldump也会转储索引信息,因此在加载转储时会自动创建索引?从文档中我看不到任何具体说明的内容.http://dev.mysql.com/doc/refman/5.1/en/mysqldump.html.谢谢.
我的应用程序允许您喜欢图片然后将您重定向到同一页面
当我尝试想要一张图片时我得到错误我可以用shell提示创建一个类似的对象,但为什么我会收到此错误?谢谢你的帮助
AttributeError at /like/3/
function' object has no attribute 'objects'Request Method: GET
Request URL: http://127.0.0.1:8000/like/3/
Exception Value: 'function' object has no attribute 'objects'
Traceback:
File "C:\Python26\Lib\site-packages\django\core\handlers\base.py" in get_response
111. response = callback(request, *callback_args, **callback_kwargs)
File "C:\o\mysite\pet\views.py" in Like
195. new_like, created = Like.objects.get_or_create(user=request.user, picture_id=picture_id)
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这是我的views.py的一部分
def Like(request,picture_id):
pid = picture_id
new_like, created = Like.objects.get_or_create(user=request.user, picture_id=picture_id)
p = Picture.objects.get(pk=pid)
if created:
HttpResponseRedirect(reverse('world:url_name'))
else:
HttpResponseRedirect(reverse('world:url_name'))
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我的URLconf:
url(
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我的模特的部分:r'^ like /(?P\d +)/ $','pet.views.Like',name ='Like'),我的boat.html
{% if picture %}
<ul>
{% for pet …Run Code Online (Sandbox Code Playgroud) 基本上,每个帖子都会出现同样的评论.我已经读过为什么会发生这种情况,但仍然无法弄清楚出了什么问题.
这是我在页面上看到的内容:

这是我的模板代码:
{% block content %}
<p> The post id is: {{ post_object.id}} </p>
<p> The post URL: {{ post_object.get_absolute_url }}
{# DISQUS #}
<div id="disqus_thread"></div>
<script type="text/javascript">
/* * * CONFIGURATION VARIABLES: EDIT BEFORE PASTING INTO YOUR WEBPAGE * * */
var disqus_shortname = 'MySiteName'; // required
var disqus_identifier = '{{ post_object.id }}';
var disqus_url = 'http://localhost:8000{{ post_object.get_absolute_url }}';
var disqus_title = '{{ post_object.title }}';
var disqus_developer = 1;
/* * * DON'T EDIT BELOW THIS LINE * …Run Code Online (Sandbox Code Playgroud) 经过长时间思考这个主题没有结果,我希望有人可以给我一个关于下载phpUnit-Test的提示.如何为此函数创建一个phpUnit测试,该测试执行zip-File的下载?或者是否有通常的做法来测试这样的逻辑?
public function createOutput($zipFolderName) {
$zipFolderName = $zipFolderName."/imageResizer.zip";
header('Content-Type: application/zip');
header('Content-disposition: attachment; filename=' . $zipFolderName);
header('Content-Length: ' . filesize($zipFolderName));
readfile($zipFolderName);
}
Run Code Online (Sandbox Code Playgroud) 当我在postgres中收到错误时,我根本无法检索错误代码.
在我的程序测试中,我知道我会收到以下错误"pq:重复键值违反了唯一约束"associations_pkey"".
查看postgres文档,这很可能是pq错误代码23505.
我需要在Go程序中获取该数字,以便我可以检查不同类型的错误并以有用的方式响应最终用户.
但是,我似乎无法抓住Go中的错误代码,只显示错误消息.我的代码如下:
stmt, _ := DB.Prepare("INSERT INTO table (column_1) VALUES ($1)")
_, err = stmt.Exec("12324354")
if err != nil {
log.Println("Failed to stmt .Exec while trying to insert new association")
log.Println(err.Error())
fmt.Println(err.Code())
} else {
Render.JSON(w, 200, "New row was created succesfully")
}
Run Code Online (Sandbox Code Playgroud) 当我go test对整个包执行时,测试失败并显示:
$ go test github.com/dm03514/go-edu-db/...
# github.com/dm03514/go-edu-db/backends
go1: internal compiler error: in read_type, at go/gofrontend/import.cc:669
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gccgo-4.9/README.Bugs> for instructions.
FAIL github.com/dm03514/go-edu-db/backends [build failed]
? github.com/dm03514/go-edu-db/cmd [no test files]
# github.com/dm03514/go-edu-db/httpd
go1: internal compiler error: in read_type, at go/gofrontend/import.cc:669
Please submit a full bug report,
with preprocessed source if appropriate.
See <file:///usr/share/doc/gccgo-4.9/README.Bugs> for instructions.
FAIL github.com/dm03514/go-edu-db/httpd [build failed]
? github.com/dm03514/go-edu-db/logging [no test files]
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虽然上述测试无法go install正确构建,但我可以正确运行每个单独的测试: …
我的请求对象包含一个唯一的ID,我的应用程序中的每个日志都必须具有该ID。该ID还必须传播到我从后端调用的任何API上,现在,我正在将请求对象传递到任何地方。这显然不是理想的解决方案,有什么建议吗?
代码流
客户端------->服务器(生成请求ID,将其用于所有日志)----->将请求ID传递给任何api调用
码:
app.use(function(req,res,next) {
logger.info("My message",req);
});
Run Code Online (Sandbox Code Playgroud) 我是python框架内省的新手,我正在尝试设置分析器或跟踪器以跟踪str函数调用.我已经以各种方式设置了跟踪器,但我认为我缺少关于帧内省的一些关键理解以及如何获得内置函数名称(即str)
def test_trace():
sys.setprofile(trace_calls)
hi = str('hellllo')
stuff = []
for i in range(10):
stuff.append(str(random.randrange(0, 10000000000)))
print(hi)
os._exit(0)
def trace_calls(frame, event, arg):
'''
if event not in ('call', 'c_call'):
return
'''
stack = collections.deque()
stack.appendleft(_expand_arg(arg) + _expand_frame(frame))
while frame.f_back is not None:
stack.appendleft(_expand_arg(arg) + _expand_frame(frame))
frame = frame.f_back
print('-' * 100)
for frame in stack:
print(frame)
def _expand_arg(arg):
if arg is None:
return ()
return (
# arg.__name__,
)
def _expand_frame(frame):
code = frame.f_code
c_class = …Run Code Online (Sandbox Code Playgroud) 我需要帮助来了解Bull Queue(bull.js)如何处理并发作业。
假设我有10个Node.js实例,每个实例都实例化连接到同一Redis实例的Bull Queue:
const bullQueue = require('bull');
const queue = new bullQueue('taskqueue', {...})
const concurrency = 5;
queue.process('jobTypeA', concurrency, job => {...do something...});
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这是否意味着在所有10个节点实例中全局最多有5个(并发)类型的并发运行作业jobTypeA?还是我误会了,并发设置是每个节点的实例?
如果一个Node实例指定不同的并发值会怎样?
我可以确定作业不会被多个Node实例处理吗?
python ×4
go ×3
django ×2
javascript ×2
node.js ×2
unit-testing ×2
bull.js ×1
concurrency ×1
disqus ×1
express ×1
idioms ×1
mysql ×1
mysqldump ×1
oop ×1
php ×1
phpunit ×1
postgresql ×1
python-3.x ×1