Hello Mike,
Thank you for your response!
First of all, I'm apologize, I have lack knowledge in sql. I guess my SQL
should be as:
Get all users invited by specific user:
SELECT u.name AS "sender", i.name AS "invitee"
FROM invitation inv
LEFT JOIN user u ON inv.sender_id=u.id
LEFT JOIN user i ON inv.invitee_id=i.id
WHERE inv.sender_id=?;
Get user who invited specific user:
SELECT u.name AS "invited_by", i.name AS "invitee"
FROM invitation inv
LEFT JOIN user u ON inv.sender_id=u.id
LEFT JOIN user i ON inv.invitee_id=i.id
WHERE inv.invitee_id=?;
понедельник, 18 марта 2019 г., 17:48:26 UTC+3 пользователь Mike Bayer
написал:
>
> On Sat, Mar 16, 2019 at 9:33 AM kosta <naum...@gmail.com <javascript:>>
> wrote:
> >
> > Hello everyone!
> >
> > I've designed invitation model
> > class User(Base):
> > __tablename__ = 'user'
> >
> > id = Column(Integer, primary_key=True)
> > name = Column(String(64))
> > email = Column(String(64))
> > class Invitation(Base):
> > __tablename__ = 'invitation'
> >
> > id = Column(Integer, primary_key=True)
> > sender_id = Column(Integer, ForeignKey('user.id'))
> > invitee_id = Column(Integer, ForeignKey('user.id'), unique=True)
> > sender = relationship('User', foreign_keys=[sender_id],
> backref='invite_list')
> > invitee = relationship('User', foreign_keys=[invitee_id],
> backref='invited_by', uselist=False)
> >
> > email = Column(String)
> > phone = Column(String)
> > token = Column(String)
> >
> > My logic is:
> >
> > 1. Create a new record in Invitation table: sender_id - current user,
> email or phone and unique generated token.
> > 2. Create a new record in User table keep received token, commit it.
> > 3. Find a record in Invitation table by filter token and update filed
> invitee_id == new_user.id
> >
> >
> > My problem is backref return value for invited_by - return (of course)
> Invitation record.
> > My question is whether I've possibility return for invited_by User
> record via Invitation table or not?
>
> you can find any record via anything, what SQL would you like to emit
> please ?
>
>
>
> >
> >
> > --
> > SQLAlchemy -
> > The Python SQL Toolkit and Object Relational Mapper
> >
> > http://www.sqlalchemy.org/
> >
> > To post example code, please provide an MCVE: Minimal, Complete, and
> Verifiable Example. See http://stackoverflow.com/help/mcve for a full
> description.
> > ---
> > You received this message because you are subscribed to the Google
> Groups "sqlalchemy" group.
> > To unsubscribe from this group and stop receiving emails from it, send
> an email to sqlalchemy+...@googlegroups.com <javascript:>.
> > To post to this group, send email to sqlal...@googlegroups.com
> <javascript:>.
> > Visit this group at https://groups.google.com/group/sqlalchemy.
> > For more options, visit https://groups.google.com/d/optout.
>
--
SQLAlchemy -
The Python SQL Toolkit and Object Relational Mapper
http://www.sqlalchemy.org/
To post example code, please provide an MCVE: Minimal, Complete, and Verifiable
Example. See http://stackoverflow.com/help/mcve for a full description.
---
You received this message because you are subscribed to the Google Groups
"sqlalchemy" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to sqlalchemy+unsubscr...@googlegroups.com.
To post to this group, send email to sqlalchemy@googlegroups.com.
Visit this group at https://groups.google.com/group/sqlalchemy.
For more options, visit https://groups.google.com/d/optout.
