On Fri, Nov 11, 2016 at 7:59 AM, Muhammad Aldo Firmansyah
<m.aldofirmans...@gmail.com> wrote:
> I want to make API using flask, flask-restless and flask sqlalchemy.
> Database using postgres
>
> Here's my model. The relation below is one-to-many (User have one or many
> tasks. And a task is belongs to one user.
>
>
> class User(Base):
> __tablename__ = 'users'
> id = db.Column('id', db.Integer, primary_key=True)
> fullname = db.Column(db.String(40))
> email = db.Column(db.String(35))
> username = db.Column(db.String(20))
> password = db.Column(db.String(20))
>
> #todos = db.relationship('Todo', back_populates='user')
> todos = db.relationship('Todo', backref='user', lazy='dynamic')
> #todos = db.relationship("Todo", order_by=Todo.id,
> back_populates="user")
>
> def __init__(self, fullname, email, username, password):
> self.fullname = fullname
> self.email = email
> self.username = username
> self.password = password
>
>
> class Todo(Base): # <--- extend dari SQLAlchemy
> __tablename__ = 'todos'
> id = db.Column('id', db.Integer, primary_key=True)
> title = db.Column(db.String(60))
> text = db.Column(db.String(100))
> done = db.Column(db.Boolean, default=False, nullable=False)
> pub_date = db.Column(db.DateTime)
>
> user_id = db.Column(db.Integer, db.ForeignKey('users.id'))
> #user = db.relationship('User', back_populates='todos')
> #user = db.relationship('User')
> #user_id = db.Column(db.Integer, back_populates="todos")
> #user_id = db.relationship('User', back_populates="todos")
>
> def __init__(self, title, text, done):
> self.title = title
> self.text = text
> self.done = done
> self.pub_date = datetime.utcnow()
>
> when I run that, it give me error:
>
> sqlalchemy.exc.ProgrammingError: (psycopg2.ProgrammingError) column
> todos.user_id does not exist
>
> I already tried several solution on sqlalchemy documentation, stack overflow
> but still error and still don't get it. And I want to add more models such
> as Tag, Project, Progress, Members.
This error is coming from postgres. SQLAlchemy has generated a query
that includes the column "todos.user_id", but postgres is reporting
that the column doesn't exist.
Are you sure that your table definitions in postgres match your
SQLAlchemy definitions? If you created them through SQLAlchemy in the
first place, perhaps it was done using an older version of the class
definitions that didn't have a user_id column.
Simon
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
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