flask-sqlalchemy

问题 I would like to retrieve user data from RDS whenever the API endpoint {{url}}/api/users/login is called to authenticate users, however, I am currently having issues with retrieving data from RDS. Error stacktrace This is the full stacktrace of the error: Current package versions Flask==1.1.2 Flask-Cors==3.0.10 flask-marshmallow==0.14.0 Flask-Migrate==2.5.3 Flask-RESTful==0.3.8 Flask-SQLAlchemy==2.4.4 marshmallow==3.10.0 marshmallow-sqlalchemy==0.24.1 SQLAlchemy==1.4.0b1 python==3.7 My

问题 I don't think I fully understand association tables. I know how to work with normal tables i.e add rows and what not but I don't understand how to work with an association table. why would I use the below student_identifier = db.Table('student_identifier', db.Column('class_id', db.Integer, db.ForeignKey('classes.class_id')), db.Column('user_id', db.Integer, db.ForeignKey('students.user_id')) ) Vs class studentIdent(db.model): db.Column(db.Integer, db.ForeignKey('classes.class_id')), db.Column

问题 I'm trying to implement a custom mixin in Python 3.6. Child classes would inherit its methods as well as base class. db = flask_sqlalchemy.SQLAlchemy() class CustomMixin(object): # {... __init__ is not being explicitly called, instance and class methods go here ...} class UserModel(CustomMixin, db.Model) # {... class variables, own and inherited methods go here ...} However, although my solution works, it gives a weak warning in PyCharm Community 2019.2: user = UserModel(class_var_1=value_1,

问题 I have a models like this: class User(db.Model): id = db.Column(db.Integer, primary_key=True) first_name = db.Column(db.String(64), index=True) last_name = db.Column(db.String(64), index=True) def full_name(self): return '%s %s' % (self.first_name, self.last_name) I want to get the full_name method in a query, I try it like it: user = db.session.query(User.full_name()).all() But I get this error message: TypeError: full_name() missing 1 required positional argument: 'self' Then I try to call

问题 I am trying to build a simple blogging platform to learn Python and Flask. I am using SQLAlchemy to connect to a Postgres db hosted on Heroku and flask_s3 to serve static files from an AWS bucket. Im mostly following along from this: https://gist.github.com/mayukh18/2223bc8fc152631205abd7cbf1efdd41/ All was going well, it is correctly hosted on Heroku and connceted to AWS S3 bucket, ready to go. I am stuck however on how to add blog posts to the database through some kind of form or route

问题 I am trying to build a simple blogging platform to learn Python and Flask. I am using SQLAlchemy to connect to a Postgres db hosted on Heroku and flask_s3 to serve static files from an AWS bucket. Im mostly following along from this: https://gist.github.com/mayukh18/2223bc8fc152631205abd7cbf1efdd41/ All was going well, it is correctly hosted on Heroku and connceted to AWS S3 bucket, ready to go. I am stuck however on how to add blog posts to the database through some kind of form or route

问题 I am trying to build a simple blogging platform to learn Python and Flask. I am using SQLAlchemy to connect to a Postgres db hosted on Heroku and flask_s3 to serve static files from an AWS bucket. Im mostly following along from this: https://gist.github.com/mayukh18/2223bc8fc152631205abd7cbf1efdd41/ All was going well, it is correctly hosted on Heroku and connceted to AWS S3 bucket, ready to go. I am stuck however on how to add blog posts to the database through some kind of form or route

问题 I am trying to build a simple blogging platform to learn Python and Flask. I am using SQLAlchemy to connect to a Postgres db hosted on Heroku and flask_s3 to serve static files from an AWS bucket. Im mostly following along from this: https://gist.github.com/mayukh18/2223bc8fc152631205abd7cbf1efdd41/ All was going well, it is correctly hosted on Heroku and connceted to AWS S3 bucket, ready to go. I am stuck however on how to add blog posts to the database through some kind of form or route

问题 I have the following model defined with Flask-SQLAlchemy: """models.py""" from flask_sqlalchemy import SQLAlchemy db = SQLAlchemy() skill_candidate = db.Table( 'SkillCandidate', db.Column('skill_id', db.String, db.ForeignKey('skill.id')), db.Column('candidate_id', db.Integer, db.ForeignKey('candidate.id'))) class Candidate(db.Model): id = db.Column(db.Integer, primary_key=True) skills = db.relationship("Skill", secondary=skill_candidate) class Skill(db.Model): id = db.Column(db.String,

问题 I have 2 tables: restaurants and foods, and a 3rd table restaurants_foods which stores the many to many relationship between the 2 tables restaurants_foods = db.Table('restaurants_foods', db.Column('restaurant_id', db.Integer, db.ForeignKey('restaurants.id'), primary_key=True), db.Column('food_id', db.Integer, db.ForeignKey('foods.id'), primary_key=True), db.Column('food_price', db.Float) ) class Food(Model): __tablename__ = "foods" id = db.Column(db.Integer, primary_key=True, autoincrement