[原文] PostgreSQL auto-generated UUID, sequence or identity column for primary key?

Sometimes clients ask me about the best option to automatically generate primary keys. In this article, I’ll explore these options and make recommendations. Why should the primary key be automatically generated? Every table needs a primary key. In a relational database, it is important to be able to identify individual table rows. If you want […]

SMS verification code, identity verification name, and mobile phone three-element real name in three steps, teach you how to call the API interface, examples can be used

SMS verification code, identity verification name, and mobile phone three-element real-name three-step process It is full of dry goods to share, and the code can be run after obtaining the corresponding AppKey; python3 environment As we all know, the biggest problems faced by information systems and website business are illegal system login, login password colliding […]

IDENTITY V (wlacm competition questions)

topic description Yuki has recently become obsessed with a game called IDENTITY V (Fifth Personality). The Children’s Day is approaching, and the game also launched an event. During the event, use different characters to participate in the battle. According to the player’s performance in the game, the corresponding deduction points will be given to the […]

Tens of millions of spike system-7. User microservice integration Identity+vue registration implementation

User Microservice Identity 1. Create table Introduce the Volo.Abp.Identity.Domain package in WBC.User.Domain first <PackageReference Include=”Volo.Abp.Identity.Domain” Version=”4.4.3″ /> <PackageReference Include=”Volo.Abp.IdentityServer.Domain” Version=”4.4.3″ /> Using integration modules in UserDomainModule typeof(AbpIdentityDomainModule)//integrated Identity domain module Because ef needs to be used to create a table, Identity also needs to be integrated in ef <PackageReference Include=”Volo.Abp.EntityFrameworkCore” Version=”4.4.3″ /> <PackageReference Include=”Volo.Abp.Identity.EntityFrameworkCore” Version=”4.4.3″ […]

Linux user identity switching (su, sudo)

Article directory Linux User Identity Switching su Use Cases sudo Use Cases visudo and /etc/sudoers A single user can use all root commands, with sudoers file syntax Use the function of the wheel user group to avoid passwords to process visudo Limited command operations Create visudo by alias sudo time interval problem How to use […]

Lesson 3, LInux directory structure and user identity

Lesson 3, LInux directory structure and user identity Everything is a file under LInux, everything starts from “/” (inverted tree structure) and uses a tree structure to store files according to the file system hierarchy standard (FHS), and defines the purpose of common directories. Linux is strictly case-sensitive. File names must not contain slashes / […]

Establishing SSL connection without server’s identity verification is not recommended

Wed Mar 29 22:25:52 CST 2023 WARN: Establishing SSL connection without server’s identity verification is not recommended. According to MySQL 5.5.45 + , 5.6.26 + and 5.7.6 + requirements SSL connection must be established by default if explicit option isn’t set. For compliance with existing applications not using SSL the verifyServerCertificate property is set to […]

The difference between HashMap and IdentityHashMap

1. Example comparison between HashMap and IdentityHashMap public static void main(String[] args) {<!– –> HashMap hashMap = new HashMap(); hashMap.put(“1”, “1”); hashMap.put(String.valueOf(1), “1”); hashMap.put(String.valueOf(‘1’), “1”); hashMap.put(new String(“1”), “1”); System.out.println(hashMap); IdentityHashMap identityHashMap = new IdentityHashMap(); identityHashMap.put(“1”, “1”); identityHashMap.put(String.valueOf(1), “1”); identityHashMap.put(String.valueOf(‘1’), “1”); identityHashMap.put(new String(“1”), “1”); System.out.println(identityHashMap); } Console prints: {1=1} {1=1, 1=1, 1=1, 1=1} The 4 keys […]