sqlalchemy

问题 Let's say I have the following: association_table = Table('things_stuffs', Base.metadata, autoload=True, extend_existing=True) class Thing(Base): __tablename__ = 'things' __table_args__ = {'autoload': True} class Stuff(Base): __tablename__ = 'stuffs' __table_args__ = ( {'autoload': True} ) things = relationship(Thing, secondary=association_table, backref=backref("stuffs", uselist=False, lazy='dynamic')) Now, if I want to get all the things from a Stuff instance I can do: a_stuff_instance

问题 Let's say I have the following: association_table = Table('things_stuffs', Base.metadata, autoload=True, extend_existing=True) class Thing(Base): __tablename__ = 'things' __table_args__ = {'autoload': True} class Stuff(Base): __tablename__ = 'stuffs' __table_args__ = ( {'autoload': True} ) things = relationship(Thing, secondary=association_table, backref=backref("stuffs", uselist=False, lazy='dynamic')) Now, if I want to get all the things from a Stuff instance I can do: a_stuff_instance

问题 I was connecting to MS SQL with sqlalchemy using bwlow code and now it has been migrated to azure cloud. I tried the chaging the values code but i think its not the proper way to connect ActiveDirectoryPassword import sqlalchemy from sqlalchemy import event, create_engine # OLD connection string engine = sqlalchemy.create_engine("mssql+pyodbc://" + "username" + ":" + "passkey" + "@" + "server" + "/" + "Database" + "?driver=SQL+Server" @event.listens_for(engine, 'before_cursor_execute') def

问题 To desc my problem. Can see this raw sql: select datediff(now(), create_time) > 7 as is_new from test order by is_new desc limit 19; I try to implement by SQLAlchemy step by step: diff_days = func.datediff(today, test.create_time).label("diff_days") session.query(diff_days).filter(test.id.in_((1,2,3,33344))).order_by(diff_days.asc()).all() This work fine. But when I want to desc > in mysql. It failed: is_new = func.greater(func.datediff(today, test.create_time), 7).label("is_new") session

问题 To desc my problem. Can see this raw sql: select datediff(now(), create_time) > 7 as is_new from test order by is_new desc limit 19; I try to implement by SQLAlchemy step by step: diff_days = func.datediff(today, test.create_time).label("diff_days") session.query(diff_days).filter(test.id.in_((1,2,3,33344))).order_by(diff_days.asc()).all() This work fine. But when I want to desc > in mysql. It failed: is_new = func.greater(func.datediff(today, test.create_time), 7).label("is_new") session

问题 I am trying to create a blog using Flask. Every post can have multiple tags also every tag could be associated with multiple posts. So I created a many-to-many relationship. My questions is how do i save multiple tags when creating a new post. And since every post can have different number of tags how do i show this is in the form? Also, how can i create new tags along with the post and then use those tags with other posts? This is models.py - postcategory = db.Table('tags', db.Column('posts

问题 I am trying to create a blog using Flask. Every post can have multiple tags also every tag could be associated with multiple posts. So I created a many-to-many relationship. My questions is how do i save multiple tags when creating a new post. And since every post can have different number of tags how do i show this is in the form? Also, how can i create new tags along with the post and then use those tags with other posts? This is models.py - postcategory = db.Table('tags', db.Column('posts

问题 The User object can be involved with a Project in many different ways, specified by Job association table. In my template file, I'm trying to loop through all of the projects in current_user.projects and with each one, specify what the Job was for that user in that project... but I can't get the syntax right. MODELS class Project(db.Model): id = db.Column(db.Integer(), primary_key=True) title = db.Column(db.String(80)) users = db.relationship("Job", back_populates="project") class User(db

问题 The User object can be involved with a Project in many different ways, specified by Job association table. In my template file, I'm trying to loop through all of the projects in current_user.projects and with each one, specify what the Job was for that user in that project... but I can't get the syntax right. MODELS class Project(db.Model): id = db.Column(db.Integer(), primary_key=True) title = db.Column(db.String(80)) users = db.relationship("Job", back_populates="project") class User(db

问题 The User object can be involved with a Project in many different ways, specified by Job association table. In my template file, I'm trying to loop through all of the projects in current_user.projects and with each one, specify what the Job was for that user in that project... but I can't get the syntax right. MODELS class Project(db.Model): id = db.Column(db.Integer(), primary_key=True) title = db.Column(db.String(80)) users = db.relationship("Job", back_populates="project") class User(db