sqlite

Django Rest framework 之 序列化

▼魔方 西西 提交于 2021-01-23 04:53:12
RESTful 规范 django rest framework 之 认证(一) django rest framework 之 权限(二) django rest framework 之 节流(三) django rest framework 之 版本(四) django rest framework 之 解析器(五) django rest framework 之 序列化(六) django rest framework 之 分页(七) django rest framework 之 视图(八) 一、前言 先建立数据库,并添加相应的数据,用来后面序列化使用 1、建立数据库模型 为数据建立相应的数据库模型,并且有一对一,多对多,外键关联。 from django.db import models class UserGroup(models.Model): title = models.CharField(max_length=32) class UserInfo(models.Model): user_type_choices = ( (1,'普通用户'), (2,'VIP'), (3,'SVIP'), ) user_type = models.IntegerField(choices=user_type_choices) username = models.CharField

Python爬虫之四仓库(数据库)

99封情书 提交于 2021-01-22 12:13:59
Sqlite数据库 第三方库名:sqlite3 import sqlite3 #创建数据库连接对象 conn = sqlite3 . connect ( "my_data.db" ) #创建数据库操控对象 control = conn . cursor ( ) #查询 #返回可迭代对象 info = control . execute ( "select * from novel" ) data = [ i for i in info ] ##增加 ##返回操控对象,插入值需要注意,字符串要用单引号括起来 control . execute ( "insert into novel(id,name,author) values('{}','{}','{}')" . format ( "1" , "虚之神" , "小書" ) ) conn . commit ( ) ##删除 ##返回操控对象,删除值需要注意,字符串要用单引号括起来 control . execute ( "delete from novel where name = '{}'" . format ( "虚之神" ) ) conn . commit ( ) #修改 #返回操控对象,修改值需要注意,字符串要用单引号括起来 control . execute ( "update novel set author = '{}

How to clear an Android ListView and populate it with new data?

99封情书 提交于 2021-01-21 07:37:35
问题 I have a spinner and a listview in the same Activity. The listview is loaded with a list of items. i want when user clicks on the item from spinner the listview will be clear and new listview will load according to item chooses in spinner setListAdapter(new ArrayAdapter<String>(this, R.layout.listviewxml, video)); ListView lv=getListView(); lv.setTextFilterEnabled(true); Please tell how to do this? i am not able to clear the listview 回答1: If you have passed a List or an Array to the Adapter ,

DLL hell with SQLite

冷暖自知 提交于 2021-01-21 06:22:55
问题 Some of our users are getting an issue with the version of sqlite.interop.dll that is being loaded at runtime, and it's a real head scratcher. Background: A WPF application built for AnyCPU, deployed with SQlite .NET and sqlite.interop.dll version 1.0.89. We deploy both x86 and x64 dlls and employ the delay loading included with SQLite. This has been fine until recently, when we started getting a few support issues from users that had - typically - recently purchased new Dell machines. It

DLL hell with SQLite

ⅰ亾dé卋堺 提交于 2021-01-21 06:22:22
问题 Some of our users are getting an issue with the version of sqlite.interop.dll that is being loaded at runtime, and it's a real head scratcher. Background: A WPF application built for AnyCPU, deployed with SQlite .NET and sqlite.interop.dll version 1.0.89. We deploy both x86 and x64 dlls and employ the delay loading included with SQLite. This has been fine until recently, when we started getting a few support issues from users that had - typically - recently purchased new Dell machines. It

SQL like query features in Google App Script to pull data from Google Sheets

帅比萌擦擦* 提交于 2021-01-21 05:59:04
问题 I am trying to build a Google Apps Script web app that will pull data from a Google sheet and display it in rows and columns in an HTML page in the browser. By following the samples etc I wrote this code that WORKS! function doGet(){ return HtmlService .createTemplateFromFile('Report3') .evaluate(); } function getData(){ var spreadsheetId = '1Z6G2PTJviFKbXg9lWfesFUrvc3NSIAC7jGvhKiDGdcY'; var rangeName = 'Payments!A:D'; var values = Sheets .Spreadsheets .Values .get(spreadsheetId,rangeName)

Sqlite lack of ALTER support, Alembic migration failing because of this. Solutions?

时光怂恿深爱的人放手 提交于 2021-01-20 17:46:46
问题 I am developing a small registration application for a friend zumba class, using Flask, SQLAlchemy and Flask-migrate(alembic) to deal with db update. I settled on SQlite because the application has to be self contained and runs locally on a laptop without internet access and SQLite requires no installation of a service or other, which is a must too. Dealing with SQLite lack of support of ALTER table wasn't a problem during the initial development as I simply destroyed, recreated the DB when

populating data from xml file to a sqlite database using python

你离开我真会死。 提交于 2021-01-20 16:58:02
问题 I have a question related to some guidances to solve a problem. I have with me an xml file, I have to populate it into a database system (whatever, it might be sqlite, mysql) using scripting language: Python. Does anyone have any idea on how to proceed? Which technologies I need to read further? Which environments I have to install? Any tutorials on the same topic? I already tried to parse xml using both by tree-based and sax method in other language, but to start with Python, I don't know

SQLite in ASP.NET Core with EntityFrameworkCore

谁都会走 提交于 2021-01-20 14:11:45
问题 How do you add and use an SQLite database in an ASP.NET Core web application, using EntityFramework 7 ? I dived into ASP.NET Core the moment I heard about it and created my first web application, I suddenly had a bunch of data that I wanted to store and SQLite seemed like the obvious choice. Since I wanted it to stay with my application, keep it lightweight, simple and avoid setting up a separate database. So how would one go about creating an SQLite database in ASP.NET Core? ASP.NET Core -

populate combobox editable username and line edit password from sqlite3

∥☆過路亽.° 提交于 2021-01-19 06:35:47
问题 I have 1 combobox editable username and 1 line edit password i want load user list from database sqlite3 to combobox. After load list i want action on itemlist combobox get password current selected user from database. pyqt5 application table columns table records ######Combo Box 2 - PM's self.groupBox_2 = QtWidgets.QGroupBox(self.tab) self.groupBox_2.setGeometry(QtCore.QRect(10, 140, 191, 51)) self.groupBox_2.setObjectName("groupBox_2") self.comboBox_3 = QtWidgets.QComboBox(self.groupBox_2)