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Before, ID was implemented with auto increment. Now I want to use Snowflake algorithm to generate primary key. What changes should I make? catalog Background Implementation plan Scenario 1 - add primary key manually Scenario 2 - override save() method Scenario 3 - using pre in Django Signals_ save() ...

In flask, many people prefer to operate the database through SQLAlchemy. In this case, it is recommended to use package instead of module to split the data model into a separate module. Such an approach is not necessary, but more reasonable. Flask-SQLAlchemy Extension Because SQLAlchemy is a general database abstracti ...

1, Implementation method 1. Pure template language implementation 2. Implementation of custom simpletag (in essence, it simplifies the judgment of pure template language) 2, Fundamentals The principle is to match the url filter conditions through django routing system, take the filter conditions as the database query results, and return the ...

1. Creating Django projects with pycharms Remember to install mysqlclient (1) Database configuration We found the DATABASES configuration item in the settings.py file of the project, and changed its information to: DATABASES = { 'default': { 'ENGINE': 'django.db.backends.mysql', # Or use mysql.connector.django 'NAME': 'u ...

Lu Feixue city deploying vue+django   Deployment of Luffy Learning City One day, Ritian sent me two mysterious codes. It's said that they are the crystallization of mjj   I put these two codes on a website. You can download them by yourself Lu Fei Xue Cheng django Code https://files.cnblogs.com/files/tiger666/luffy_boy.zip vu ...

Add throttling Custom throttling method Limit access to 3 times within 60s (1) Create a new throttle.py under the API folder. The code is as follows: # utils/throttle.py from rest_framework.throttling import BaseThrottle import time VISIT_RECORD = {} #Save access records class VisitThrottle(BaseThrottle): '''60s Can only ...

"login success!" will be returned after the last article is successfully logged in String is just a temporary solution, just for the convenience of verifying the processing logic of login. After verification, it needs to be replaced by html page. 1. Think about what will happen after the successful login? The pre ...

Conditional filtering Common filtration Example Interface usage Multilevel list get find default non ID Different api versions are not used Browse times Filter current user Multi parameter use Conditional filtering Common filtration _exact equals like 'aaa' __iexact is exactly the same as ig ...

Article directory INFO Install cookie cutter Run the specified project template and create the project as prompted Execution process Project structure Complete project structure and configuration Cookie cutter option reference INFO Cookiecutter is a command-line tool for creating projects throu ...

Model ORM (relationship object mapping) 1. field AutoField(Field) # int Auto increment column, parameter must be filled primary_key=True BigAutoField(AutoField) # bigint Auto increment column, parameter must be filled primary_key=True //If there is no auto increment column in the model, a column named id will b ...