我正在使用基本的android应用程序,我不知道在android studio中添加jar文件的位置.

我希望用户只能更新一个特定字段.例如:

models.py

class Snippet(models.Model):
    created = models.DateTimeField(auto_now_add=True)
    title = models.CharField(max_length=100, blank=True, default='')
    code = models.TextField()
    linenos = models.BooleanField(default=False)
    language = models.CharField(choices=LANGUAGE_CHOICES, default='python', max_length=100)
    style = models.CharField(choices=STYLE_CHOICES, default='friendly', max_length=100)

    class Meta:
        ordering = ('created',)

serializer.py

class SnippetSerializer(serializers.ModelSerializer):
    class Meta:
        model = Snippet
        fields = ('id', 'title', 'code', 'linenos', 'language', 'style')

views.py

class SnippetList(generics.ListCreateAPIView):
    queryset = Snippet.objects.all()
    serializer_class = SnippetSerializer


class SnippetDetail(generics.RetrieveUpdateDestroyAPIView):
    queryset = Snippet.objects.all()
    serializer_class = SnippetSerializer

一旦Snippet创建,用户应该只能更新title字段.

我知道我可以通过以下方式实现这一目标:

serializers.py

def update(self, instance, validated_data):
        """
        Update and …

我正在声明一个包含图像的界面.我需要给它什么类型.

export interface AdInterface {
    email: string;
    mobile: number;
    image?:   ??
}

我正在尝试使用factory_boy测试两个Django模型之间的多对多关系.factory_boy文档似乎没有讨论这个问题,我无法弄清楚我做错了什么.当我运行第一个测试时,我得到错误"AttributeError:'Pizza'对象没有属性'顶部'".第二次测试我得到了类似的错误.

当我在调试器中运行测试时,我可以看到"浇头"对象,但它不知道如何从中获取名称.我是否正确定义了PizzaFactory的_prepare方法？当你有多对多的关系时,如何从另一个表中访问一个表中的名称？

谢谢.

models.py:

from django.db import models

class Topping(models.Model):
    name = models.CharField(max_length=50)

    def __unicode__(self):
        return self.name

class Pizza(models.Model):
    name = models.CharField(max_length=100)
    toppings = models.ManyToManyField(Topping)

    def __unicode__(self):
        return self.name

factories.py:

import factory
from models import Topping, Pizza

class ToppingFactory(factory.Factory):
    name = 'mushrooms'

class PizzaFactory(factory.Factory):
    name = 'Vegetarian'

    @classmethod
    def _prepare(cls, create, **kwargs):
        topping = ToppingFactory()
        pizza = super(PizzaFactory, cls)._prepare(create, **kwargs)
        pizza.toppings.add(topping)
        return pizza

tests.py

from django.test import TestCase
import factory
from app.models import Topping, Pizza
from app.factories import ToppingFactory, PizzaFactory …

我Docker Image在Openshift. 我没有使用 nginx 来设置 [secure_scheme_headers]：https : //github.com/benoitc/gunicorn/issues/1766。

Gunicorn 配置

gunicorn --chdir /src/app wsgi:application --bind 0.0.0.0:8000 --workers 4 --timeout 180 -k gevent

错误

Traceback (most recent call last):
  File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base_async.py", line 66, in handle
    six.reraise(*sys.exc_info())
  File "/usr/local/lib/python3.7/site-packages/gunicorn/six.py", line 625, in reraise
    raise value
  File "/usr/local/lib/python3.7/site-packages/gunicorn/workers/base_async.py", line 49, in handle
    req = six.next(parser)
  File "/usr/local/lib/python3.7/site-packages/gunicorn/http/parser.py", line 41, in __next__
    self.mesg = self.mesg_class(self.cfg, self.unreader, self.req_count)
  File "/usr/local/lib/python3.7/site-packages/gunicorn/http/message.py", line 181, in __init__
    super(Request, self).__init__(cfg, unreader)
  File "/usr/local/lib/python3.7/site-packages/gunicorn/http/message.py", …

OutputError

{
 "item_image": [
    "The submitted data was not a file. Check the encoding type on the form."
],
"item_thumb": [
    "The submitted data was not a file. Check the encoding type on the form."
]
}

我发布的数据是

输入

{
    "item_name": "Lural",
    "item_image": "/home/prashant/Desktop/suede.png",
    "item_thumb": "/home/prashant/Desktop/suede.png",
    "item_description": "sd",
    "item_mass": 1,
    "item_category": "Make Up",
    "item_sub_category": "Sub-Feminine",
    "item_est_price": "123.12",
    "item_wst_price": "120.34"
}

适用于媒体类型应用/ json

views.py

@api_view(['GET', 'POST'])
def product_list(request):
    if request.method == 'POST':
        serializer = ProductSerializer( data=request.data)
        # data.encode("base64")
        if serializer.is_valid():
            serializer.save() …

我更新了django-dynamic-model存储库以支持Django 1.9.我收到了这个错误:

CommandError: 

Conflicting migrations detected; multiple leaf nodes in the migration
graph: (0001_initial, 0002_auto__add_field_dynamicschemafield_extra in
dynamicmodel).
To fix them run 'python manage.py makemigrations --merge'

运行后python manage.py makemigrations --merge,我又出现了一个错误:

 File "/local/lib/python2.7/sitepackages/django/core/management/__init__.py",  
line 353, in execute_from_command_line
utility.execute()

 File "/local/lib/python2.7/sitepackages/django/core/management/__init__.py", line 345, in execute
self.fetch_command(subcommand).run_from_argv(self.argv)

 File 
"/local/lib/python2.7/site-packages/django/core/management/base.py", line 348, in run_from_argv
self.execute(*args, **cmd_options)

File 
"/local/lib/python2.7/site-packages/django/core/management/base.py", line 399, in execute
output = self.handle(*args, **options)

File 
"/local/lib/python2.7/site-packages/django/core/management/commands/makemigrations.py", line 97, in handle
return self.handle_merge(loader, conflicts)

File 
   "/local/lib/python2.7/site-packages/django/core/management/commands/makemigrations.py", line 216, in handle_merge …

如何使用django_autcomplete_light将自动填充添加到表单中的一个字段.我有一个基于模型的表单,我想在firstname字段中添加自动完成功能.

到目前为止我做了以下事情:

安装django_autocomplete_light

更改了INSTALLED_APPS:

INSTALLED_APPS = (
  'autocomplete_light',
  'django.contrib.admin',
   ...

将它添加到urls.py,这是我的urls.py:

来自django.conf.urls的import include,来自django.contrib的url导入管理员

urlpatterns = [
    url(r"^admin/", include(admin.site.urls)),
    url(r"^app/", include("app.urls")),
    url(r"^autocomplete/", include("autocomplete_light.urls")),
    url(r"^.*$", include("app.urls")),
]

创建了一个名为autocomplete_light_registry.py的文件,并添加了以下内容:

import autocomplete_light as al
from .models import *

al.register(Person,
    search_fields = ["^firstname"],
    attrs={
        "placeholder":"First name",
        "data-autocomplete-minimum-characters":1,
    },
    widget_attrs={
        "data-widget-maximum-values":4,
        "class":"modern-style",
    },
)

改变了我的PersonForm:

class PersonForm(forms.ModelForm)

至:

class PersonForm(autocomplete_light.ModelForm)

    class Meta:
        model = Person
        autocomplete_fields = ("firstname")

我还将以下行添加到表单的html页面:

{% include 'autocomplete_light/static.html' %}

我导入了所有必要的jquery文件

但是自动完成功能不会出现.我没有得到任何错误.我按照文档教程.

我正在使用python manage.py runserver运行该应用程序.

编辑:

我将urlpatterns更改为(首先制作了django-autocomplete-light url):

urlpatterns = [ …

我想从不同的文本或 json 或 csv 文件中读取数据。我应该遵循哪种方法？

我已经阅读了这些博客File read，read 2GB text file with small RAM for the different approach of file reading 。

不同的做法：

* Reading a file in chunks
* Reading file chunks concurrently
* Reading the entire file into memory
* Splitting a long string into words
* Scanning word by word

无法找到使用小 RAM 读取文件的最快方法。

我无法从 django-taggit 序列化标签。我遵循了here的说明，但它已经过时了。

这是我所做的：

视图.py

class TagsSerializer(serializers.WritableField):

    def from_native(self, data):
        if type(data) is not list:
            raise ParseError("expected a list of data")
        return data

    def to_native(self, obj):
        if type(obj) is not list:
            return [tag.name for tag in obj.all()]
        return obj

我收到此错误：

'module' 对象没有属性 'WritableField

显然 WritableField 已被弃用。

我正在使用 django 1.8、DRF 3.2 和 django-taggit-0.17。