flask-sqlalchemy

问题 I'm sure this is such an easy error to fix, if I could only find where it is. This is the error from the Flask app: 11:58:18 web.1 | ERROR:xxxxxx.core:Exception on / [GET] 11:58:18 web.1 | Traceback (most recent call last): 11:58:18 web.1 | File "/Library/Python/2.7/site-packages/flask/app.py", line 1817, in wsgi_app 11:58:18 web.1 | response = self.full_dispatch_request() 11:58:18 web.1 | File "/Library/Python/2.7/site-packages/flask/app.py", line 1477, in full_dispatch_request 11:58:18 web

问题 I have a RadioField form item that uses values for its field from the database. If the database is not created I cannot start the Flask Webserver even though it should only access the database when I go to that page and load that form. If I update the database while the Webserver is running I don't see the form with the new database information. Until I restart the Flask webserver. How can I get it so that it forces the form to reload its values from the database when you visit the page. Also

问题 I want to get all the columns of a table with max(timestamp) and group by name. What i have tried so far is: normal_query ="Select max(timestamp) as time from table" event_list = normal_query \ .distinct(Table.name)\ .filter_by(**filter_by_query) \ .filter(*queries) \ .group_by(*group_by_fields) \ .order_by('').all() the query i get : SELECT DISTINCT ON (schema.table.name) , max(timestamp).... this query basically returns two columns with name and timestamp. whereas, the query i want : SELECT

问题 I want to get all the columns of a table with max(timestamp) and group by name. What i have tried so far is: normal_query ="Select max(timestamp) as time from table" event_list = normal_query \ .distinct(Table.name)\ .filter_by(**filter_by_query) \ .filter(*queries) \ .group_by(*group_by_fields) \ .order_by('').all() the query i get : SELECT DISTINCT ON (schema.table.name) , max(timestamp).... this query basically returns two columns with name and timestamp. whereas, the query i want : SELECT

问题 I have a Flask web app that used to run on a standalone server using the following: Flask/SQLAlchemy MariaDB uwsgi nginx On the stand alone server this application ran fine. I have since "dockerized" this application across two containers: uwsgi-nginx-flask MariaDB Every since dockerizing I occasionally get this error (entire traceback posted at the end): Lost connection to MySQL server during query The MariaDB log shows the following errors with verbose logging: 2020-05-10 18:35:32 130

问题 I already tried a solution from this question and this but failed (on of these solutions are present here), I don't know what to say additionally, logically both FK (sender and recipient) must be present in users, technically all looks are correct here class User(Base): __tablename__ = "users" # # # META # # # id = Column(Integer, primary_key=True, index=True) email = Column(String, unique=True, index=True, nullable=False) # # # RELATIONSHIPS # # # messages = relationship("Message", back

问题 I am building a simple CMS that includes a profile management page. On this profile page, along with other fields, there exists a dropdown list, which I generate from a table 'parks' using the wtforms extension's QuerySelectField: from wtforms.ext.sqlalchemy.fields import QuerySelectField The rest of the fields on the profile page are populated by the 'user' table. Let assume that a user has logged in, and that their record in the 'user' table is already populated. Among the fields in the

问题 I am create a simple app which can performance basic operations. SQLite is used as database. I want to perform wildcard search but I know that it has poor performance. I want to try out full text search but I cannot full a example on how to do it. I confirmed that SQLite has full text search support. Here is my sample code. from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy() class Person(db.Model): id = db.Column(db.Integer, primary_key=True) name = db.Column(db.Text, unique=True,

问题 I am create a simple app which can performance basic operations. SQLite is used as database. I want to perform wildcard search but I know that it has poor performance. I want to try out full text search but I cannot full a example on how to do it. I confirmed that SQLite has full text search support. Here is my sample code. from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy() class Person(db.Model): id = db.Column(db.Integer, primary_key=True) name = db.Column(db.Text, unique=True,

问题 I'm programming a Website with Authentification while using the Flask Framework. I've tried every solution that i found on the internet but nothing worked for me. My first idea was, that the Project Structure was corrupt. e.g. missing imports from other files. But thats not the problem i think. My models.py File: from flask_login import UserMixin, LoginManager from flaskapp import db, login_manager @login_manager.user_loader def get_user(user): try: return get_id(user) except: return None