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python - How to get random data every time django calls a tag

The code for views is like this kwargs["random paragraph"] = Content.objects.order_by("?")[0].content is to randomly extract a paragraph each time and then the index is like this {code...} My purpose Every time it is called, random paragraph 1, random paragraph 2, random paragrap...

大家讲道理 2017-05-18 10:52:56

How to return information in the middle of PHP chain calls

How to get the error message when there is an error in the PHP chain call. The error message here is not a simple string. For example, during the chain call process, a certain function may need to return an array and report an error directly when it does not meet a certain condition. , saying that t...

学习ing 2017-07-05 10:46:11

java - abstract inner class + generics

Simple inner class usage: {code...} Add generics to the above example {code...} Call the inner class in the test method and compile correctly. An error is reported in the main method, which cannot be referenced from a static context. If you call an internal class in another newly created class, no e...

给我你的怀抱 2017-05-17 10:00:28

Calling plugins from outside WordPress: a step-by-step guide

So, I need to call the plugin from outside my woocommerce website. I have my own database connected to Woocommerce via REST API when it comes to products, orders, etc. My problem is that now I need to call the plugin on admin.php?page=pluginName&action=action&orderid=123456. The communicatio...

P粉226642568 2023-09-03 00:00:08

AWS Aurora MySQL database cannot be queried by Node Lambda function

I'm trying to use a Lambda function to write data to an AWS AuroraMySQL database. Code For some reason it doesn't seem to work. My code so far is very simple but it doesn't execute correctly. This is a simple Lambda function that is called when a user registers to Cognito and should create a new ent...

P粉184747536 2023-08-25 21:31:48

javascript - vue label has no effect if it contains a component

The vue project uses the label label for an input (file upload). There is a component in the label. Clicking on the component does not call the input upload. I wrote another label and typed a few words in it. After clicking, the input can be called. What is the problem? The following cannot call {co...

伊谢尔伦 2017-06-15 09:21:56

After updating the package or changing yarn.lock, NextJS API calls work normally in the development environment, but fail in the production environment.

For some reason, the API calls for my NextJS (hosted on Vercel) fail in production after updating packages or re-tuning yarn.lock. Every API call (even a simple helloworld) returns HTML similar to the index file. The package causing this issue is updating Mantine, which is a client UI library. Howev...

P粉128563140 2024-03-28 11:50:32

php - How to implement the QR code shared by WeChat and Alipay

A QR code used in some stores can be scanned and paid by WeChat and Alipay. What is the principle? Is the QR code a simple web page? If it is a web page, how can two third parties be called at the same time? What about the interface?

欧阳克 2017-06-29 10:08:10

When using Firebase in React, should getAuth getStorage getFirestore etc. be called once and passed or can they be called in every component?

If I need the result of using constdb=getFirestore() or constauth=getAuth(app) etc. in multiple components I should: rewrite these lines in each component whenever I need constdb=getFirestore() or constauth =getAuth(app) etc. or just call them at the top level of the App component and pass them as p...

P粉788571316 2024-01-16 22:40:06

Cypress test to get element attributes

I've just started developing a new testing project to add Cypress tests to an ExtJS application. ExtJS uses dynamic IDs, so we use different selectors to identify elements. Now, if I use simple Javascript, I can get the poperties and call the method of the selected element like this: ele=document.ge...

P粉988025835 2024-03-30 18:13:55

javascript - HTML <input type="file"> cannot pop up file selector when clicked

The code is as follows: {Code...} The simplest and most basic HTML code. When running on the company computer, after clicking to select a file, the button will be clicked, but the file selector will not be called out. There should be nothing special about the company computer except that it is not c...

仅有的幸福 2017-06-05 11:09:11

python3.x - Java calls python, and the python code stops automatically, and the reason cannot be found

{Code...} Calling the python code takes a long time to execute. It is estimated to take several hours, about five or six hours. If you execute the Python command directly in the shell alone, there will be no problem; however, if you use java to call python in this way, there will be a problem: after...

習慣沉默 2017-06-28 09:23:50

java - How does Spring create different instances of a specific type of bean based on the parameters passed in at startup and call these instances in subsequent business?

Note that instead of simply configuring the bean scope into multiple instances, you need to create different instances according to different parameters at startup, and these created instances need to be called in subsequent business. My current idea is to use factoryBean to proxy the abstracted par...

学习ing 2017-06-23 09:12:52

javascript - Discussion on the design plan of a project

Recently, I have been working on a configurable project for the company's event page. Let's call it cms. The function is to configure the corresponding module in the management backend every time a promotional event is held, such as Double 11. The final generated page interface has a structure simil...

迷茫 2017-05-19 10:41:26

Python: Pymysql hangs silently with no response?

The first application using Python. My application hangs on pymysql calls, is this library stable? Just trying to connect to a MySQL database here but every Python package seems to be difficult to use? In any other language it's very simple and has no weird problems. migrateFresh.py: importpymysql.c...

P粉600845163 2024-04-01 10:55:37

PHP: Call MySQL stored procedure with input and output parameters (not "INOUT")

I want to call a stored procedure in MySQL from PHP. The procedure takes input and output parameters - not "INOUT" parameters. To give a simple example, suppose I have the following stored procedure in MySQL: DELIMITER$$DROPPROCEDUREIFEXISTS`test_proc`$$CREATEPROCEDURE`test_proc`(ininput_p...

P粉502608799 2023-10-19 16:56:30

Can two functions in a js file call each other?

I would like to ask my seniors, I wrote two functions in a js file. Both work fine when used alone, but when I call one within the other, The called function doesn't work, why? The code is as follows: function aa() { some code; bb(); }function bb(){some code;}

享耳 2019-05-04 21:38:14

javascript - A problem with js call, very simple code, how to interpret the output result?

foo2() uses an arrow function. According to the understanding of call, foo.call({id:23}) should output 23, not 0. So, can anyone explain this? The code is as follows: <script type="text/javascript"> {code...} </script> Execution result: 02

phpcn_u1582 2017-06-26 10:50:10

Laravel Sanctum & NuxtJS SPA cannot create csrf cookie in browser

I have a backend API with Sanctum in Laravel and separate repository SPA in NuxtJS I'm trying to validate my SPA with Sanctum. I'm trying to follow the Sanctum documentation to get the CSRF cookie in the browser. The problem is that when I call the CSRF token endpoint provided by Sanctum, I get the ...

P粉512363233 2023-12-13 13:49:38

System interaction - Does nginx have a module that can call system commands?

Recently, I want to use Nginx to make a simple system management interface, which is to call system commands through RPC. Then return the system output (both error and standard output). If you use PHP or Perl, I know you can use their system interactive interface, but I don't want to introduce scrip...

伊谢尔伦 2017-05-16 17:30:12