moved_entities.extid may not be NULL

[server] use sqls_create_multicol_unique_index to index entities.extid SQL Server's UNIQUE is not standards compliant, it doesn't accept two NULL values. Related to #7173702.

[server] fix checkintegrity with pyodbc "msg % row" dies with "not enough arguments for format string" if row is a pyodbc.Row.

[schema] remove unique constraint on unlimited String attribute SQL Server doesn't allow indexing (and thus unique constraints) on nvarchar(max). Related to #7173702.

[sources/native] fix potential NameError (closes #7364249)

[py3k] unicode → six.text_type

[devtools/testlib] Port CubicWebTC.view() to py3k testlib.TestCase.set_description's argument will eventually be printed out to sys.stdout/stderr. On python 2, this object takes bytes-like objects (eg, str) whereas python 3's takes unicode-like objects and handles the encoding on its own. Thus the 'str' type can used in both versions to eventually display the description on screen.

[devtools/testlib] port 'fake_form' test to io.BytesIO

[dataimport] port ucsvreader tests to io.BytesIO

[py3k] io.BytesIO

[py3k] io.StringIO

Port cw.Binary to io.BytesIO And add plenty of tests too!

[py3k] execfile → exec

[py3k] file → open

[py3k] six.integer_types

[py3k] basestring → six.string_types

[py3k] import CookieJar using six.moves

[py3k] import urllib2 from six.moves

[py3k] import range using six.moves

[py3k] import queue using six.moves

[py3k] import filter using six.moves

[py3k] import zip using six.moves

[py3k] import SimpleCookie using six.moves

[py3k] import HTTP client constants and exceptions using six.moves

[py3k] import URL mangling functions using six.moves

[py3k] import 'pickle' using six.moves

[pkg] Add dependency on six 1.4.0

[tests] Replace use of deprecated TestCase.assert_

[predicates] Simplify range(len()) iteration

[dataimport] Use pickle.dump instead of dumps

[web/facet] Simplify reversed/sorted calls

[web/test] Use TestCase.setUpClass instead of setUpModule

Use isinstance() instead of type comparison

Unused imports

[py3k] tuple unpacking in function args

[py3k] ur'' is gone

[py3k] octals and long

[py3k] Fix raise with embedded traceback python 3 removed the raise syntax with 2 and 3 expressions.

[py3k] print function

[py3k] except as

[py3k] backtick to repr

[hooks/syncschema] make sure CWUniqueTogetherConstraintDelOp happens before CWConstraintDelOp SQLServer refuses to index an unlimited text column, so we should drop unique_together constraints (which imply an index) before we drop size constraints. Closes #5560601.

[hooks/syncschema] only call "ALTER TABLE" once when changing a size constraint Until now we would: - remove the old size constraint from the in-memory schema - call update_rdef_column which removes the size restriction from the column's type - add the new constraint object - call update_rdef_column which adds the size restriction back This breaks on SQL Server when the column is involved in an index (e.g. as part of a multi-column unique constraint), because in the intermediate stage the column's type is "nvarchar(max)", which is not indexable. Of course we must still detect the case where a size constraint is really dropped and update the db schema accordingly. Closes #5557633.

[syncschema] only add to the `synchronized` set if all possible updates have been done Otherwise a simple sync_schema(syncprops=False) turns the subsequent sync_schema() calls into a no-op. Closes #6510918.

[qunit] remove unused 'data_files' parameter Its use was removed when we stoppped pointing firefox at file:// web/test/jstests/ajax_url2.html has never actually been used, it's only been ever mentioned in a QUnit comment.

[urlpublish] RESTPathEvaluator now use vid_from_rset This avoid cases where vid may be unexpectedly overwritten. For instance when you define a custom vid for a mime type in VID_BY_MIMETYPE, it will currently be overriden by the URL publisher when you access to /<etype> with the proper Accept header. To do so, a new 'check_table' argument is introduced, which may cause bw compatibility problems if the function has been monkey-patched. Also pep8 a bit the tests. Closes #5705835

[server/sources] use decode_extid in datafeed

[server/sources] add decode_extid method avoids having the same dance in both eid_type_source variants

[server/repo] kill repo.pinfo() session.cnxset is dead, this can't work.

[web/sessions] simplify session cleanup session.cnx.check() is no longer a thing. It dates back to dbapi.

[server/repo] fix typo

[server/sources] AbstractSource.__ne__ Seems confusing to have __eq__ but not __ne__.

[server/sources] fix docstring for eid_type_source

[views] fix ProcessInformationView: SESSION_MANAGER can be None (closes #5753280) eg. with pyramid.

[server/migractions] drop mock_object It doesn't seem to have ever been used.

[test] kill unused lgc.testlib imports