小编Usm*_*ool的帖子

我正在寻找一种从多个视图控制器调用自定义警报视图的方法。到目前为止，我已经进行了几次不同的尝试，但都没有成功。

• 我使用界面构建器创建了一个警报视图，该视图在一个视图控制器上运行良好，但在另一个视图控制器上运行良好。

• 然后我尝试以编程方式创建警报视图，认为它可能与其他视图控制器上未连接的插座有关。这个也适用于一个视图控制器而不是另一个。

• 我制作了一个单独的 swift 文件并制作了一个公共函数和相同的结果。使用最后一种方法，我能够在多个视图控制器上成功地重新使用常规 UIAlertController ，但这并不是我正在寻找的。

使用前两种方法，我没有遇到任何编译错误。该应用程序运行良好，然后当我从另一个视图控制器调用警报时崩溃。

提前感谢您的任何意见！

编辑：

当我把它放在另一个 swift 文件中时，这个例子有效。

public func showSimpleAlert(title: String, message: String?, presentingController: UIViewController) {

if IS_OS_8_OR_LATER() {
    let controller = UIAlertController(title: title, message: message, preferredStyle: .Alert)

    controller.addAction(UIAlertAction(title: "OK", style: .Cancel, handler: { (action) -> Void in

    }))

    presentingController.presentViewController(controller, animated: true, completion: nil)
} else {
    let alert = UIAlertView(title: title, message: message, delegate: nil, cancelButtonTitle: "OK")
    alert.show()
}
}

这是我想要的工作。

public func showAlert(oMsg: String, oTitle:String) {
    alertView.backgroundColor = UIColor.whiteColor()
    alertView.layer.cornerRadius = …

我是 Django 的新手。我的项目在 DjangoRestFramework

这个项目有一个用户：

模型.py：

class Users(models.Model):
    name = models.CharField(max_length=20, null=True)
    lastName = models.CharField(max_length=50, null=True)
    phone = models.IntegerField(unique=True, null=False, default='phone')
    password = models.CharField(max_length=25, null=True)
    natNum = models.IntegerField(unique=True, null=True)
    degImage = models.ImageField(upload_to='Images/degrees/', null=False, blank=False,default='Images/degrees/None/no-img.jpg')
    natImage = models.ImageField(upload_to='Images/nationalCards/', null=False, blank=False,default='Images/nationalCards/None/no-img.jpg')
    sex = models.CharField(null=True, max_length=1)
    province = models.CharField(null=True, max_length=20)
    city = models.CharField(null=True, max_length=40)
    job = models.CharField(null=True, max_length=20)
    code = models.CharField(max_length=4, null=True)
    last_seen = models.DateTimeField(default=django.utils.timezone.now)
    points = models.IntegerField(null=False, default=0)
    scorers = models.IntegerField(null=False, default=0)

在 views.py 中我做了一个注册函数，但是对于 degImage 和 natImage 有一个问题。

视图.py

@api_view(["POST"])
@parser_classes((MultiPartParser, …

这是我在长期运行应用程序时收到的错误日志。

Oct 22 11:41:18 uwsgi[4613]: OSError: write error
Oct 22 11:41:48 uwsgi[4613]: Tue Oct 22 11:41:48 2019 - uwsgi_response_write_body_do(): Broken pipe [core/writer.c line 341] during GET /api/events/system-alarms/ 
Nov 19 19:11:01 uwsgi[30627]: OSError: write error
Nov 19 19:11:02 uwsgi[30627]: Tue Nov 19 19:11:02 2019 - uwsgi_response_writev_headers_and_body_do(): Broken pipe [core/writer.c line 306] during GET /api/statistics/connected-clients/?type=auto&required_fields=0,11 

另外，我需要详细了解操作系统写入错误和管道损坏的原因。

我创建了一个Nuxt包含 Bulma的应用程序，并希望访问/覆盖我.vue文件中的 Bulma 变量。我已经按照此处的说明进行操作，这些说明似乎与我在其他几个位置找到的内容相匹配，但是在尝试访问文件中的$primary变量时仍然出现错误.vue。

这是我的assets/css/main.scss文件：

@import "~bulma/sass/utilities/_all.sass";
@import "~bulma/bulma";

我的nuxt.config.js模块部分：

modules: [
    ['nuxt-sass-resources-loader', './assets/css/main.scss']
],

还有我的.vue文件：

@import "~bulma/sass/utilities/_all.sass";
@import "~bulma/bulma";

这是终端中的错误消息：

Module build failed (from ./node_modules/sass-loader/lib/loader.js):                                                                                                                                                                                                                       friendly-errors 11:51:52

    color: $primary;
          ^
      Undefined variable: "$primary".
      in /Data/dev/GIT/Homepage/source/pages/about/index.vue (line 16, column 12)
                                                                                                                                                                                                                                                                                           friendly-errors 11:51:52
 @ ./node_modules/vue-style-loader??ref--9-oneOf-1-0!./node_modules/css-loader/dist/cjs.js??ref--9-oneOf-1-1!./node_modules/vue-loader/lib/loaders/stylePostLoader.js!./node_modules/postcss-loader/src??ref--9-oneOf-1-2!./node_modules/sass-loader/lib/loader.js??ref--9-oneOf-1-3!./node_modules/vue-loader/lib??vue-loader-options!./pages/about/index.vue?vue&type=style&index=0&lang=scss& 4:14-384 14:3-18:5 15:22-392
 @ ./pages/about/index.vue?vue&type=style&index=0&lang=scss&
 @ ./pages/about/index.vue
 @ ./.nuxt/router.js
 @ ./.nuxt/index.js
 @ ./.nuxt/client.js
 @ multi eventsource-polyfill webpack-hot-middleware/client?reload=true&timeout=30000&ansiColors=&overlayStyles=&name=client&path=/__webpack_hmr/client ./.nuxt/client.js …

@GetMapping(value = "/result")
    public int addition(
                    @ApiParam(value = "FirstValue", required = true, type = "string", defaultValue = "0") @RequestParam(value = "firstValue", required = true) Integer x,
                    @ApiParam(value = "SecondValue", required = true, type = "string", defaultValue = "0") @RequestParam(value = "secondValue", required = true) Integer y) {

        return x + y;
    }

在刷新 swagger UI 页面时，我们收到以下错误

2019-06-26 15:44:11.484  WARN 16667 --- [nio-7854-exec-3] i.s.m.p.AbstractSerializableParameter    : Illegal DefaultValue 0 for parameter type integer

java.lang.NumberFormatException: For input string: ""
    at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) ~[na:1.8.0_144]
    at …

views.py

def addbook(request): 
    if request.POST:
        book_form = BookForm(request.POST)
    author_form = AuthorForm(request.POST)
        if (book_form.is_valid() and author_form.is_valid()):
        log.debug("test....")
            book=book_form.save()
            author=author_form.save()
        author.book=book
        author.save()

        return redirect('/index/')
    else:
    book_form=BookForm()
        author_form=AuthorForm()
        return render_to_response('addbook.html',{'form':book_form,'form':author_form},context_instance=RequestContext(request))

forms.py

from django import forms
from django.forms import ModelForm
from myapp.models import Book,Author


class AuthorForm(ModelForm):

    class Meta:
        model = Author

        fields=['author_id','first_name','last_name','email','age']        


class BookForm(ModelForm):

    class Meta:
        model = Book

        fields=['book_id','book_name','publisher_name','author']        

models.py

from django.db import models

class Author(models.Model):
    author_id = models.AutoField(primary_key=True)
    first_name = models.CharField(max_length=30)
    last_name = models.CharField(max_length=40)
    email = models.EmailField()
    age=models.IntegerField()

    class Meta:
    db_table=u'Author'

    def …

我假设它用于引用openerp中其他模块中的字段,但我不确定.

在这里,他们以某种方式从一个产品模块到销售模块获得价格.

price = self.pool.get('product.pricelist').price_get(cr, uid, [pricelist], product, qty or 1.0, partner_id, ctx)[pricelist]
    if price is False:
        warn_msg = _("Cannot find a pricelist line matching this product and quantity.\n"
                "You have to change either the product, the quantity or the pricelist.")

        warning_msgs += _("No valid pricelist line found ! :") + warn_msg +"\n\n"
    else:
        result.update({'price_unit': price})
        if context.get('uom_qty_change', False):
            return {'value': {'price_unit': price}, 'domain': {}, 'warning': False}

我有一个模型Foo，用作我的普通 DRF 序列化器的模型。

模型.py

class Foo(models.Model):
    name = models.CharField(max_length=20)
    description = models.TextField()
    is_public = models.BooleanField(default=False)

序列化器.py

class FooSerializer(serializers.ModelSerializer):
    class Meta:
        model = Foo

视图.py

class FooRetrieveAPIView(RetrieveAPIView):
    queryset = Foo.objects.all()
    serializer_class = FooSerializer

现在，前端代码正在使用此端点的结果，这是如何识别下一页要显示的基础。200无论如何，我需要更改状态（现有记录）和404（不存在记录）返回的结果的结构。

实际结果（来自普通 DRF）：

$ curl localhost:8000/foo/1/  # existing record
{"id": 1, "name": "foo", "description": "foo description", is_public=false}

$ curl localhost:8000/foo/2/  # non-existent record
{"detail": "Not found."}

我想要的结果是：

$ curl localhost:8000/foo/1/
{"error": "", "foo": {"id": 1, "name": "foo", "description": "foo description", is_public=false}}

$ …

试图从网络调用中获取返回回复对象。会话是一个使用明星尖叫 API 的类。我似乎无法让它发挥作用。它只打印出一组结果，这是第一个 id 的结果。我在这里缺少什么？

let myGroup = DispatchGroup()

for i in 0 ..< marketIds.count {
    myGroup.enter()
    self.session.retrieve(withMethod: MarketKeys.key, withParameters: [MarketKeys.id: marketIds[i]], completion: { (results, error) in
        print("results \n")
        print(results!)
        myGroup.leave()
        })
    }
myGroup.notify(queue:.main) {
print("Done")
}

我已经python-django在皮查姆建立了这个项目。

对python manage.py runserver在运行模式下的命令，它工作正常，但是当我在调试模式下的项目中，我得到以下异常：

Traceback (most recent call last):
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 2060, in <module>
    main()
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 2054, in main
    globals = debugger.run(setup['file'], None, None, is_module)
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 1405, in run
    return self._exec(is_module, entry_point_fn, module_name, file, globals, locals)
  File "/home/usmanmaqbool/Downloads/pycharm-community-2018.3/helpers/pydev/pydevd.py", line 1412, in _exec
    pydev_imports.execfile(file, globals, locals)  # execute the script
  File "/home/usmanmaqbool/Desktop/proj/manage.py", line 22, in <module>
    execute_from_command_line(sys.argv)
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 367, in execute_from_command_line
    utility.execute()
  File "/home/usmanmaqbool/Envs/proj/local/lib/python2.7/site-packages/django/core/management/__init__.py", line 359, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File …