Извините за беспорядочный код, я немного заблудился на этапе проб и ошибок (у меня закончился кофе).
Я пытаюсь создать приборную панель. для отслеживания моих заказов, доходов и т. д. c. для этого я создал базу данных, включающую все связанные данные. После этого я загрузил «шаблон панели управления flask» и начал его редактировать. Я могу собрать все данные о своих заказах и использовать их в индексе. html с помощью фигурных браслетов.
Когда я пытаюсь суммировать все строки доходов в IDLE;
from flask import Flask, render_template, request, jsonify
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import create_engine
from sqlalchemy.sql import text
from sqlalchemy import func
engine = create_engine('sqlite:///transactions.db', echo=True)
conn = engine.connect()
global b
a = text('SELECT * FROM mytable')
b = conn.execute(a).fetchall()
app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + 'transactions.db'
db = SQLAlchemy(app)
revenue = db.engine.execute('select sum(total) from mytable').scalar()
revenue = int(revenue)
print(revenue)
это работает без проблем, но когда я пытаюсь реализовать это в своем файле маршрута следующим образом:
# -*- encoding: utf-8 -*-
from app.home import blueprint
from flask import Flask, render_template, redirect, url_for
from flask_login import login_required, current_user
from app import login_manager
from jinja2 import TemplateNotFound
from flask_sqlalchemy import SQLAlchemy
from sqlalchemy import create_engine
from sqlalchemy.sql import text
# custom block
from sqlalchemy import create_engine
engine = create_engine('sqlite:///transactions.db', echo=True)
conn = engine.connect()
global b
global revenue
a = text('SELECT * FROM mytable')
b = conn.execute(a).fetchall()
app = Flask(__name__)
dborder = SQLAlchemy(app)
db = SQLAlchemy(app)
#revenue
engin = create_engine('sqlite:///transactions.db', echo=True)
coni = engine.connect()
db1 = SQLAlchemy(app)
revenue = db1.engine.execute('select sum(total) from mytable').scalar()
revenue = int(revenue)
#revenue
app.config['SQLALCHEMY_DATABASE_URI'] = 'sqlite:///' + 'transactions.db'
class mytable(dborder.Model):
name = dborder.Column(dborder.Integer, primary_key=True)
add = dborder.Column(dborder.String)
# end custom block
@blueprint.route('/index')
@login_required
def index():
#if not current_user.is_authenticated:
# return redirect(url_for('base_blueprint.login'))
global b
orderlist = b
return render_template('index.html', orderlist = orderlist, revenue = revenue)
@blueprint.route('/<template>')
def route_template(template):
if not current_user.is_authenticated:
return redirect(url_for('base_blueprint.login'))
try:
return render_template(template + '.html')
except TemplateNotFound:
return render_template('page-404.html'), 404
except:
return render_template('page-500.html'), 500
, я получаю сообщение об ошибке;
2020-05-29 00:41:13,977 INFO sqlalchemy.engine.base.Engine SELECT CAST('test plain returns' AS VARCHAR(60)) AS anon_1
2020-05-29 00:41:13,977 INFO sqlalchemy.engine.base.Engine ()
2020-05-29 00:41:13,978 INFO sqlalchemy.engine.base.Engine SELECT CAST('test unicode returns' AS VARCHAR(60)) AS anon_1
2020-05-29 00:41:13,978 INFO sqlalchemy.engine.base.Engine ()
2020-05-29 00:41:13,979 INFO sqlalchemy.engine.base.Engine SELECT * FROM mytable
2020-05-29 00:41:13,979 INFO sqlalchemy.engine.base.Engine ()
C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flask_sqlalchemy\__init__.py:808: UserWarning: Neither SQLALCHEMY_DATABASE_URI nor SQLALCHEMY_BINDS is set. Defaulting SQLALCHEMY_DATABASE_URI to "sqlite:///:memory:".
warnings.warn(
C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flask_sqlalchemy\__init__.py:829: FSADeprecationWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True or False to suppress this warning.
warnings.warn(FSADeprecationWarning(
C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flask_sqlalchemy\__init__.py:829: FSADeprecationWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True or False to suppress this warning.
warnings.warn(FSADeprecationWarning(
C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\flask_sqlalchemy\__init__.py:829: FSADeprecationWarning: SQLALCHEMY_TRACK_MODIFICATIONS adds significant overhead and will be disabled by default in the future. Set it to True or False to suppress this warning.
warnings.warn(FSADeprecationWarning(
Traceback (most recent call last):
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\base.py", line 1283, in _execute_context
self.dialect.do_execute(
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\default.py", line 590, in do_execute
cursor.execute(statement, parameters)
sqlite3.OperationalError: no such table: mytable
The above exception was the direct cause of the following exception:
Traceback (most recent call last):
File "run.py", line 21, in <module>
app = create_app(config_mode)
File "C:\Users\Ozgur\Documents\python-colleect\admin panel\flask-material-dashboard\app\__init__.py", line 81, in create_app
register_blueprints(app)
File "C:\Users\Ozgur\Documents\python-colleect\admin panel\flask-material-dashboard\app\__init__.py", line 24, in register_blueprints
module = import_module('app.{}.routes'.format(module_name))
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\importlib\__init__.py", line 127, in import_module
return _bootstrap._gcd_import(name[level:], package, level)
File "<frozen importlib._bootstrap>", line 1014, in _gcd_import
File "<frozen importlib._bootstrap>", line 991, in _find_and_load
File "<frozen importlib._bootstrap>", line 975, in _find_and_load_unlocked
File "<frozen importlib._bootstrap>", line 671, in _load_unlocked
File "<frozen importlib._bootstrap_external>", line 783, in exec_module
File "<frozen importlib._bootstrap>", line 219, in _call_with_frames_removed
File "C:\Users\Ozgur\Documents\python-colleect\admin panel\flask-material-dashboard\app\home\routes.py", line 44, in <module>
revenue = db1.engine.execute('select sum(total) from mytable').scalar()
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\base.py", line 2244, in execute
return connection.execute(statement, *multiparams, **params)
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\base.py", line 1012, in execute
return self._execute_text(object_, multiparams, params)
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\base.py", line 1181, in _execute_text
ret = self._execute_context(
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\base.py", line 1323, in _execute_context
self._handle_dbapi_exception(
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\base.py", line 1517, in _handle_dbapi_exception
util.raise_(
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\util\compat.py", line 178, in raise_
raise exception
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\base.py", line 1283, in _execute_context
self.dialect.do_execute(
File "C:\Users\Ozgur\AppData\Local\Programs\Python\Python38-32\lib\site-packages\sqlalchemy\engine\default.py", line 590, in do_execute
cursor.execute(statement, parameters)
sqlalchemy.exc.OperationalError: (sqlite3.OperationalError) no such table: mytable
[SQL: select sum(total) from mytable]
(Background on this error at: http://sqlalche.me/e/e3q8)