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Summary This article is a relatively low and simple point of knowledge 1, Delayed Loading (Lazy Loading) Postpone loading until data usage;Only when accessing methods such as ToList/ToArray/First/FirstOrDefault(), delayed loading of navigation properties, etc.Only load data Example of delayed loading of navigation attributes using a proxy a ...

Implement Paging 1> Business logic for paging implementation 1->N data are displayed on each page. For the total number of data records M, the number of pages M%N==0?M/N:M/N+1; 2->Page Rendering Paging html Part 3>Switch pages, input parameters, background processing, and retrieve new eligible data 4>Paging method, js paging, and ...

It is relatively simple for Linux to back up the database regularly. crontab can be used for scheduled backup. If windows is used, it may be troublesome. 1.Linux: Step 1: configure the backup directory code on the server: mkdir /var/lib/mysqlbackup cd /var/lib/mysqlbackup Step 2: write backup script code: vi dbbackup.shPaste the f ...

The first step is to introduce jquery files, either online or offline, to add to your own staticfiles What's demonstrated here is adding offline <script src={% static 'js/jquery-2.1.1.min.js' %}></script> Note that this sentence is added before the ajax jquery script you write. Then the HTML form is as follows: ...

Scenario reproduction: The timer task is working, but when the timer function executes regularly, the error message access_is printed in the logToken fails (or cannot be obtained, etc.), access_in the test tableToken is 0; access_is available when you directly access a link to a timer function yourselfToken. Reason: When I execute by myself, ...

Necessary knowledge points of MySQL log file development Reference source: juejin.im/post/5b7c0aabf265da438415b9eb preface Log files record all kinds of activities that affect MySQL database. Common log files in MySQL database include error log, binary log, slow query log and query log. They are i ...

preface Recently, when the company used ABP to reconstruct the old project, the database was also switched from SQL SERVER to MySql. Tucao, the products used before make complaints about Windows Server 2008, SqlServer 2008R2,.Net Framework 4.5, and now embrace.net core. Back to the point. At present, there are 10w + and 100w + data in a single ...

Global error handling server Microsoft has implemented it Interceptors They are similar to Filter or Middlewares stay ASP.NET MVC core or web API, they can be used for global exception handling, logging, validation, etc. This is the server-side Interceptor's own implementation. Continuation is a Task that must wait. Then, if any exception is ...

The news data of several websites have been crawled before. Now we need to organize and display these data. The specific requirements are as follows The first step is to install the dependency package in npm install under the final project folder Here, I met a problem during the installation process. Th ...

catalog User login case requirements Development steps: 1. Create project, configuration file and import jar package. 2. Write logged in login.html Page. 3. Create the database userlogin and the table user. 4. Create a package com.qgl . 'domain'. Create an entity class user. The entity class user c ...