... User('mary', 'Mary Contrary', 'xxg527'),
... User('fred', 'Fred Flinstone', 'blah')])
-Also, Ed has already decided his password isn't too secure, so lets change it:
+Also, we've decided the password for Ed isn't too secure, so lets change it:
.. sourcecode:: python+sql
>>> jack.addresses[1].user
<User('jack','Jack Bean', 'gjffdd')>
-Let's add and commit ``Jack Bean`` to the database. ``jack`` as well as the
-two ``Address`` members in his ``addresses`` collection are both added to the
-session at once, using a process known as **cascading**:
+Let's add and commit ``Jack Bean`` to the database. ``jack`` as well
+as the two ``Address`` members in the corresponding ``addresses``
+collection are both added to the session at once, using a process
+known as **cascading**:
.. sourcecode:: python+sql
... def __repr__(self):
... return "<User('%s','%s', '%s')>" % (self.name, self.fullname, self.password)
-Then we recreate ``Address``, noting that in this case we've created the ``Address.user`` relationship
-via the ``User`` class already::
+Then we recreate ``Address``, noting that in this case we've created
+the ``Address.user`` relationship via the ``User`` class already::
>>> class Address(Base):
... __tablename__ = 'addresses'
... def __repr__(self):
... return "<Address('%s')>" % self.email_address
-Now when we load Jack (below using :meth:`~.Query.get`, which loads by primary key),
-removing an address from his ``addresses`` collection will result in that
-``Address`` being deleted:
+Now when we load the user ``jack`` (below using :meth:`~.Query.get`,
+which loads by primary key), removing an address from the
+corresponding ``addresses`` collection will result in that ``Address``
+being deleted:
.. sourcecode:: python+sql
('jack@google.com', 'j25@yahoo.com')
{stop}1
-Deleting Jack will delete both Jack and his remaining ``Address``:
+Deleting Jack will delete both Jack and the remaining ``Address`` associated
+with the user:
.. sourcecode:: python+sql
('firstpost',)
{stop}[BlogPost("Wendy's Blog Post", 'This is a test', <User('wendy','Wendy Williams', 'foobar')>)]
-If we want to look up just Wendy's posts, we can tell the query to narrow down
-to her as a parent:
+If we want to look up posts owned by the user ``wendy``, we can tell
+the query to narrow down to that ``User`` object as a parent:
.. sourcecode:: python+sql
print(session.query(Employee).all())
-# 1. Find an employee and all his/her supervisors, no matter how deep the tree.
+# 1. Find an employee and all their supervisors, no matter how deep the tree.
ealias = aliased(Employee)
print(session.query(Employee).\
filter(ealias.left.between(Employee.left, Employee.right)).\
filter(ealias.emp == 'Eddie').all())
-#2. Find the employee and all his/her subordinates.
+#2. Find the employee and all their subordinates.
# (This query has a nice symmetry with the first query.)
print(session.query(Employee).\
filter(Employee.left.between(ealias.left, ealias.right)).\
projects / thirdparty / sqlalchemy / sqlalchemy.git / commitdiff
