Programmer Think

Catalog 1.ORM introduction 2. Single Form Operation 2.1 create table 2.2 Add Table Records 2.3 Query Table Records 2.4 Delete table records 2.5 modification form record 1.ORM introduction An important part of MVC or MVC framework is ORM, which realizes the decoupl ...

cache What is caching? Caching is a kind of media that can read data faster. It also refers to other storage methods that can speed up data reading. Usually used to store temporary data, the common medium is fast memory. Why use caching? View r ...

Supplementary Knowledge Points for the Content of this Chapter Good order for importing libraries: 1. System libraries 2.django libraries 3. Self-defined libraries (third-party libraries)   redis caches database data call fast, but it is not conducive to long-term storage. mysql is used for long-term storage, but calls are slow. The sessi ...

Preface Recently, I have successfully migrated my personal website from Flask to Django. It was about four years ago that I first contacted Django. I remember that routing configuration in Django was done using regularity at that time, but I was particularly tired of it, so I decided to drop the hole.Then at the beginning of this year, I wrote ...

This article serves as a record of some of the tricks encountered in the use of python, some of which are written by myself, some of which are built-in functions of python, and some of which are taken from the Internet. In this record, only for backu ...

The routing system is to match the received requests according to the website address and specify the functions or classes to process the requests. Routing system classification: Web framework routing system is generally divided into two categories, FBV, CBV, Django both support, but some frameworks only support one. FBV (Function Base View): ...

Write spiders crawler files to cycle through the contents Request() method, which adds the specified url address to the downloader download page with two required parameters,Parameters:　　url='url'callback=page handleryield Request() is required for use The parse.urljoin() method, which is under the urllib library, is an automatic url splicin ...

Middleware and Context Processor Django Middleware It is a lightweight, low-level "plug-in" system that can intervene in Django's request and response processing and modify Django's input or output. Activating Middleware It needs to b ...

1. Django form request: The default when opening is a GET request to get the contents of the form. Point submission occurs when a POST request submits the contents of the form. Write the Get Form Content based on the above differences: from django.shortcuts import HttpResponse from django.shortcuts import render, redirect def login(request): ...

First: Preface In django, how to download csv files of website data to users? We have learned httpResponse before and used it together. Case 1 - Small File Export 1. Case descriptionWe provide the information in the database directly to the client to download. Add database model and insert data; New view, using HttpResponse, csv module to ret ...