sqlalchemy

问题 I get this error on executing the below function & It is because NaN is tried to be inserted into numeric column. Replacing NaN with 0 throughout does work but replacement with None does not. Any ideas would be appreciated def insertData(table_name, schema_name, df): if not df.empty: #input_data[file].fillna(0, inplace=True) # This works but replacing with 0's is not ideal df.where(pd.notnull(df), None) #This does not work values = df.to_dict(orient='records') table = sa.Table(table_name ,

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 a GIN index set up for full text search. I would like to get a list of records that match a search query, ordered by rank (how well the record matched the search query). For the result, I only need the record and its columns, I do not need the actual rank value that was used for ordering. I have the following query, which runs fine and returns the expected results from my postgresql db. SELECT *, ts_rank('{0.1,0.1,0.1,0.1}', users.textsearchable_index_col, to_tsquery('smit:* | ji:*'))

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

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

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