小编gad*_*dss的帖子

我在尝试向模型添加/发布数据时遇到了问题.这是我在我的python manage.py shell中所做的:

>>> from booking.models import *
>>> qa = Product.objects.get(id=5)
>>> sd = Booking.objects.create(
... date_select = '2011-11-29',
... product_name = qa.name,
... quantity = 1,
... price = qa.price,
... totalcost = 20,
... first_name = 'lalala',
... last_name = 'sadsd',
... contact = '2321321',
... product = qa.id)
Traceback (most recent call last):
  File "<console>", line 10, in <module>
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/manager.py", line 138, in create
    return self.get_query_set().create(**kwargs)
  File "/usr/local/lib/python2.7/dist-packages/django/db/models/query.py", line 358, in create
    obj = self.model(**kwargs) …

如何检查这两个维度数组是否为空？

这是我的代码：

      String[][] user = new String[5][3];

        System.out.print(user.length);

            if (user.length == 5 ){
                System.out.print("\n empty");
            }

        for (int j=0; j<3; j++) {
            System.out.print(" " + user[0][j]+ "\n");
        }

输出是：

5
 empty null null null

有没有人知道我的情况？

我的django休息框架出错,我在Windows 10操作系统上运行它.这是整个错误:

Traceback (most recent call last):
  File "manage.py", line 15, in <module>
    execute_from_command_line(sys.argv)
  File "c:\django\django\django\core\management\__init__.py", line 371, in execute_from_command_line
    utility.execute()
  File "c:\django\django\django\core\management\__init__.py", line 365, in execute
    self.fetch_command(subcommand).run_from_argv(self.argv)
  File "c:\django\django\django\core\management\base.py", line 288, in run_from_argv
    self.execute(*args, **cmd_options)
  File "c:\django\django\django\core\management\base.py", line 332, in execute
    self.check()
  File "c:\django\django\django\core\management\base.py", line 364, in check
    include_deployment_checks=include_deployment_checks,
  File "c:\django\django\django\core\management\commands\migrate.py", line 58, in _run_checks
    issues.extend(super()._run_checks(**kwargs))
  File "c:\django\django\django\core\management\base.py", line 351, in _run_checks
    return checks.run_checks(**kwargs)
  File "c:\django\django\django\core\checks\registry.py", line 73, in run_checks
    new_errors = check(app_configs=app_configs)
  File "c:\django\django\django\core\checks\urls.py", line 13, in check_url_config …

我是 python 新手，我正在制作一个处理 request.GET 方法的系统......当我将日期传递给系统时，如果它存在，那么它将查找数据库并根据该日期和其他显示数据日期，否则它会显示一个带有其他日期的日期......这是我的代码：

from django.utils.xmlutils import SimplerXMLGenerator
from piston.handler import BaseHandler
from booking.models import *
from django.db.models import *
from piston.utils import rc, require_mime, require_extended, validate
import datetime

class BookingHandler(BaseHandler):
    allowed_method = ('GET', 'POST', 'PUT', 'DELETE')
    fields = ('id', 'date_select', 'product_name', 'quantity', 'price','totalcost', 'first_name', 'last_name', 'contact', 'product')
    model = Booking
    #for product availability
    def read(self, request, id, date_select):
        if not self.has_model():
            return rc.NOT_IMPLEMENTED
        try:   
            prod = Product.objects.get(id=id)
            merge = []
            checkDateExist = Booking.objects.filter(date_select=date_select)
            if checkDateExist.exists():
                entered_date = Booking.objects.values('date_select').distinct('date_select').filter(date_select=date_select)[0]['date_select'] …

我正在使用 django 开发一个网络，它处理 wsdl。我有一个处理它的示例代码，但它是用 PHP 编写的，我想将它转换为 python 用于我的 django。这是PHP文件...

<?php
  ini_set("soap.wsdl_cache_enabled", "0");

  $WSDL                  = "DirectConnect.test.WSDL";

  $MerchantCode          = "HELLO";
  $MerchantReference     = "" . time();
  $TransactionType       = 20;
  $Amount                = 100;
  $CurrencyCode          = "PHP";
  $CardHolderName        = "RAUL O REVECHE";
  $CardNumber            = "4005550000000001";
  $ExpiryMonth           = 5;
  $ExpiryYear            = 2013;
  $CardID                = 0;
  $CardSecurityCode      = "400";
  $CustomerAccountNumber = "";
  $BillNumber            = 0;
  $CardHolderEmail       = "development@yespayments.com.ph";
  $ClientIPAddress       = $_SERVER["REMOTE_ADDR"];
  $Notes                 = "This is a test.";

  $SoapClient = new SoapClient($WSDL,array(
    "soap_version" => SOAP_1_2,
    "features"     => SOAP_SINGLE_ELEMENT_ARRAYS, …

我如何从一个值传递a.lua给b.lua？

让我们说在我的a.luai中有这个变量代码.

local value = "Hello WOrld!"
director:changeScene ("b")

我的问题是,如何我通过value从a.lua到b.lua？

提前致谢....

我有这个代码

local strs = "my dog"
print (string.gsub( strs , " ","%20"))

我只是想输出将是这样my%20dog但我得到了这个错误

Runtime error
        ... invalid capture index
stack traceback:
        [C]: ?
        [C]: in function 'gsub'

我读过%Lua的逃脱.

我的问题是,我如何申请%我替换的新字符串(strs)？

我有一个与 postgreSQL 数据库连接的 java 代码。

现在，我希望当它连接到数据库时，我还将创建数据库表。

但我的问题是，它不会创建数据库，我不知道问题是什么。

这是我的代码：

Statement st = null;
        ResultSet rs = null;
        try{
            Class.forName("org.postgresql.Driver");
            System.out.println("connect");
            } catch (ClassNotFoundException cnfe){
              System.out.println("Could not find the JDBC driver!");
              System.exit(1);
            }
        Connection conn = null;
        try {
            //database location, database user, database password
            conn = DriverManager.getConnection
                           ("jdbc:postgresql:"POS_DB","postgres", "123456");
            st = conn.createStatement();
            String qs = "CREATE TABLE IF NOT EXISTS user(user_id SERIAL NOT NULL PRIMARY KEY,username varchar(225) NOT NULL UNIQUE,password varchar(225),islogged varchar(10))";
            String qs1 = "SELECT * FROM test";
        rs = …

我对改变感到困惑。

我有一个现有的表，register我想添加一个this_date具有当前日期默认值的列。通过改变可以吗？嗯，它已经有数据了。

我在php中创建插入过程但我的代码中有问题.当refresh我的页面,它也将submit和insert数据.

这是我的代码:

<form action="/drupal/node/1" method="post">
Name: <input type="text" name="name" />
Price: <input type="text" name="price" />
Minutes: <input type="text" name="minutes" />
<input type="submit" />
</form>
<?php
$con = mysql_connect("localhost","root","");
if (!$con)
  {
  die('Could not connect: ' . mysql_error());
  }

// some code
mysql_select_db("zain", $con);
if (isset($_POST['name']) && isset($_POST['price']) && isset($_POST['minutes']))
{
 $val_name = $_POST['name'];
 $val_price = $_POST['price'];
 $val_min = $_POST['minutes'];
 $max_id_sql = mysql_query("SELECT MAX(id) FROM card_category");
 $data = mysql_fetch_array($max_id_sql);
 if ($data[0]==0)
 {
    $val_id = 1; …