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    <pre class="lang-py prettyprint-override"><code>from sqlalchemy import * from sqlalchemy.orm import * from sqlalchemy.ext.declarative import declarative_base Base = declarative_base() class A(Base): __tablename__ = 'a' id = Column(Integer, primary_key=True) b_id = Column(Integer, ForeignKey('b.id')) # method one - put everything into primaryjoin. # will work for simple lazy loads but for eager loads the ORM # will fail to build up the FROM to correctly include B cs = relationship("C", # C.id is "foreign" because there can be many C.ids for one A.id # B.id is "remote", it sort of means "this is where the stuff # starts that's not directly part of the A side" primaryjoin="and_(A.b_id == remote(B.id), foreign(C.id) == B.c_id)", viewonly=True) # method two - split out the middle table into "secondary". # note 'b' is the table name in metadata. # this method will work better, as the ORM can also handle # eager loading with this one. c_via_secondary = relationship("C", secondary="b", primaryjoin="A.b_id == B.id", secondaryjoin="C.id == B.c_id", viewonly=True) class B(Base): __tablename__ = 'b' id = Column(Integer, primary_key=True) c_id = Column(Integer, ForeignKey('c.id')) class C(Base): __tablename__ = 'c' id = Column(Integer, primary_key=True) e = create_engine("sqlite://", echo=True) Base.metadata.create_all(e) sess = Session(e) sess.add(C(id=1)) sess.flush() sess.add(B(id=1, c_id=1)) sess.flush() sess.add(A(b_id=1)) sess.flush() a1 = sess.query(A).first() print(a1.cs) print(a1.c_via_secondary) </code></pre>
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Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

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