Day4 --- flask blueprint and rest ful

The blueprint

There are three steps to use the blueprint :
1. Create a blueprint object
2. Operate on this blueprint object , Registered routing , Specify a static folder , Register template filters
3. Register the blueprint object on the application object

Start to create

The realization of the blueprint
Create a app.py File followed by a directory

app.py In the file

from flask import Flask
from views.user import user_bp # Import blueprint objects from blueprint files 
#  establish Flask example 
app=Flask(__name__)
app.register_blueprint(user_bp) # Registered blueprint 

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

In the created views Create under directory user.py file
Be similar to django Subapplications in

# 1 Create a blueprint  & 2 Add blueprint route 
from flask import Blueprint
# url_prefix #  Specify the prefix of all routes under the current blueprint 
user_bp=Blueprint('user_bp',__name__,url_prefix='/user')
#  Add blueprint route 
@user_bp.route('/hello')
def hello():
    return 'hello'

Return response

Flask-RESTful Matching blueprint

In the catalogue user.py In the file

from flask import Blueprint
# url_prefix #  Specify the prefix of all routes under the current blueprint 
user_bp=Blueprint('user_bp',__name__,url_prefix='/user')
# # First time to know Flask-RESTful
from flask_restful import Api,Resource # Import Api Follow Resource class 
# Instantiate a Api object  Api Object is used to collect routes 
api=Api(user_bp)
# Define a class , Inherited from Resource class , adopt Api To collect instantiated objects 
class Users(Resource):
    def get(self):
        return 'hello2'
## Users Is the defined class name , '/users' Is a custom route 
api.add_resource(Users,'/users')

Return response

Decorator of view class

The basic writing of ornaments
You can specify decorators for a single method
You can also use decorators

# The basic writing of ornaments 
def dec1(func):
    def warpper(*args,**kwargs):
        # The decorator content to be written 
        print('dec1')
        return func(*args,**kwargs)
    return warpper


class Users(Resource):
    ##  Only get Methods use the decorator   The first one is 
    method_decorators = {
    'get':[dec1]}
    ###  As long as this class is called   Just use the decorator   The second kind 
    ## method_decorators = [dec1]
    def get(self):
        return 'hello2'
## Users Is the defined class name , '/users' Is a custom route 
api.add_resource(Users,'/users')