Flask project configuration

1. Create project files , Configure virtual environment

python Virtual environment construction

2. establish app.py file

from create_app import create_app
from settings.config import DevConfig 

app=create_app(DevConfig) #  Here is the flask The core object 

function

function

3. establish create_app.py file

from flask import Flask
from flask_cors import CORS

#  Factory function 
def create_app(config): # config by config.py Configuration items in 
	# flask The core object 
    flask_app = Flask(__name__)  #  Instantiation flask object 
    
	#  Cross domain 
    CORS(flask_app)   

    #  Load configuration items 
 


    #  Registered blueprint 


    #  binding db  Database 


    return flask_app

4. Configuration item

4.1 establish settings Folder , establish config.py file

#  Custom base class , You can reuse 
class DefaultConfig:
    SECRET_KEY='fskfjkdgdshljgdfdsfs' #  Custom key 
    SQLALCHEMY_DATABASE_URI=""
    SQLALCHEMY_TRACK_MODIFICATIONS=False
    SQLALCHEMY_ECHO=True
    JSON_AS_ASCII = False

#  Inherit the base class above , Change the database configuration items 
class DevConfig(DefaultConfig):
 #  user name ： password @host：port： database 
# root:[email protected]:3306/p7_day05
    SQLALCHEMY_DATABASE_URI = 'mysql+pymysql://root:[email protected]:3306/p7_day05'
    

4.2 Mount to create_app.py In file

from flask import Flask
from flask_cors import CORS

#  Factory function 
def create_app(config): # config by config.py Configuration items in 
	# flask The core object 
    flask_app = Flask(__name__)  #  Instantiation flask object 
    
	#  Cross domain 
	CORS(flask_app)   

    #  Load configuration items 
    flask_app.config.from_object(config)
 
    

    #  Registered blueprint 


    #  binding db  Database 


    return flask_app

5. The blueprint

5.1 establish views Folders are used to create blueprints

establish orders.py file

from flask import Blueprint
from flask_restful import Api, Resource


# url_prefix='/orders'  Prefix all routes for the current blueprint 
order_bp = Blueprint("order_bp", __name__, url_prefix='/orders')  #  Instantiate blueprint objects 

api = Api(order_bp)  #  Instantiate route collector 

#  We will increase, delete, and change inspections 


#  Create class view 
class OrderView(Resource):
    def post(self):
		return "111"

#  Add route  
api.add_resource(KindView, '/order') #  The full address is  /orders/order

5.2 After creating the blueprint, you need to go to create_app.py Registration blueprint in file

from flask import Flask
from flask_cors import CORS
from views.orders import *



def create_app(config):
    flask_app = Flask(__name__)  #  Instantiation flask object 
    
	#  Cross domain 
	CORS(flask_app)   
	
    #  Load configuration items 
    flask_app.config.from_object(config)
    CORS(flask_app)

    #  Registered blueprint 
    flask_app.register_blueprint(order_bp) # order_bp Is the instantiated blueprint object 

    #  binding db  Database 



    return flask_app

6. Model

6.1 establish models The folder is used to put the model , Create... In the folder model.py file

from flask_sqlalchemy import SQLAlchemy

db = SQLAlchemy()  #  Instantiate database connection object 

#  Create model classes 
class OrdersModel(db.Model):
    id = db.Column(db.Integer, primary_key=True, autoincrement=True, comment="ID")
    name = db.Column(db.String(32), comment=" name ")

6.2 To create_app.py Binding model classes in

from flask import Flask
from models.model import db
from views.orders import *



def create_app(config):
    flask_app = Flask(__name__)  #  Instantiation flask object 

	#  Cross domain 
	CORS(flask_app)   

    #  Load configuration items 
    flask_app.config.from_object(config)
    CORS(flask_app)

    #  Registered blueprint 
    flask_app.register_blueprint(order_bp) # order_bp Is the instantiated blueprint object 
	
	#  First, there should be the database in the configuration item , In the binding db
    #  binding db  Database 
    db.init_app(flask_app)

    return flask_app

7. Create in project root manage.py Used to migrate

from app import app
 #  Import migration classes and migration command classes 
from flask_migrate import MigrateCommand, Migrate
#  Import management class 
from flask_script import Manager
from models.model import db

manage = Manager(app)  #  Instantiate the command line management object 

migrate = Migrate(app, db)  #  Instantiate the migration execution class 

manage.add_command("db", MigrateCommand)  #  Add a set of commands to the command line management object 

if __name__ == '__main__':
    manage.run()

00 Execute the migration command

python run.py db init initialization , It only needs to be initialized once
python run.py db migrate Generate migration file
python run.py db upgrade transfer