rename server.session.transaction into server.session.connection
The ongoing rework of the API to access the database include the splitting of
Session in two objects:
The ``Session`` object will only hold credential (user) and global session data.
A new object will publicly emerge to handle a database access. This object is
named ``Connection`` since that the way database accessors with the same property
are named in other system. So we renamed the ``Transaction`` object into
``Connection``. The ``Transaction`` object have already grown in the direction
of something directly usable by generic code, but the name ``Transaction`` is
ill suited as such object can be used for multiple database transaction in a
row.
Related to #2503918
"""This module compare the Schema on the file system to the one in the database"""
from cStringIO import StringIO
from cubicweb.web.schemaviewer import SchemaViewer
from logilab.common.ureports import TextWriter
import difflib
viewer = SchemaViewer()
layout_db = viewer.visit_schema(schema, display_relations=True)
layout_fs = viewer.visit_schema(fsschema, display_relations=True)
writer = TextWriter()
stream_db = StringIO()
stream_fs = StringIO()
writer.format(layout_db, stream=stream_db)
writer.format(layout_fs, stream=stream_fs)
stream_db.seek(0)
stream_fs.seek(0)
db = stream_db.getvalue().splitlines()
fs = stream_fs.getvalue().splitlines()
open('db_schema.txt', 'w').write(stream_db.getvalue())
open('fs_schema.txt', 'w').write(stream_fs.getvalue())
#for diff in difflib.ndiff(fs, db):
# print diff