本站收集了一篇相关的编程文章，网友周浩思根据主题投稿了本篇教程内容，涉及到Flask数据库连接、Flask数据库使用、Flask数据库、Flask数据库相关内容，已被439网友关注，相关难点技巧可以阅读下方的电子资料。
Flask数据库
数据库连接配置
HOST = "XXXXXXXXXXXXX"
PORT = 3310
USERNAME = "root"
PASSWORD = "@XXXXXXXXXXX"
DATABASE = "mydb"
SQLALCHEMY_DATABASE_URI = f"mysql+pymysql://{USERNAME}:{quote(PASSWORD)}@{HOST}:{PORT}/{DATABASE}?charset=utf8mb4"
SQLALCHEMY_TRACK_MODIFICATIONS = False
SQLALCHEMY_ECHO = True
创建实体类
from exts.DBServer import db
from sqlalchemy import Column, Integer, String, Date, DateTime
class Article(db.Model):
__tablename__ = "article"
id = Column(Integer, primay_key=True, autoincrement=True)
title = Column(String(100), nullable=True)
pub_time = Column(DateTime, nullable=True)
author = Column(String(100), nullable=True)
content = Column(String(10000), nullable=True)
origin = Column(String(1000), nullable=True)
controller:
import json
from flask.blueprints import Blueprint
from exts.DBServer import db
from ..model.Article import Article
from flask_sqlalchemy.query import Query
from flask_restful import marshal
from flask_restful import fields
article_bp = Blueprint("article", __name__, url_prefix="/article")
article_fields = {
"id": fields.Integer,
"title": fields.String,
"pub_time": fields.DateTime,
"author": fields.String,
"content": fields.String,
"origin": fields.String
}
@article_bp.route("/queryAll")
def queryAll():
query: Query = Article.query
articles = query.all()
article = query.get(1)
article2 = query.filter_by(author="XXX")
return json.dumps(marshal(articles, fields=article_fields),ensure_ascii=False)
配置打印SQL语句
from exts.DBServer import db
from sqlalchemy import Column, Integer, String
class User(db.Model):
__tablename__ = "user"
id = Column(Integer, primary_key=True, autoincrement=True)
username = Column(String(100), nullable=True)
password = Column(String(100), nullable=True)
def __repr__(self):
return "User %r" % self.body
或、与、非和排序
@user_bp.route("/query")
def query_match():
query: Query = User.query
result = query.filter(or_(User.username.contains("祥"), User.id == 1))
return json.dumps(marshal(result.all(), fields=user_fields), ensure_ascii=False)
@user_bp.route("/in")
def in_sql():
query: Query = User.query
result = query.order_by(-User.password, -User.id)
return json.dumps(marshal(result.all(), fields=user_fields), ensure_ascii=False)到此这篇关于详解Flask数据库的连接与使用的文章就介绍到这了,更多相关Flask数据库内容请搜索码农之家以前的文章或继续浏览下面的相关文章希望大家以后多多支持码农之家！
