[server] Add source_by_eid and source_by_uri methods to repository
Most of the times we only need to retrieve one source (either by uri or eid)
and querying sources_by_eid and sources_by_uri properties on repository just
for one item is costly. So these methods query what's needed. We issue a
ValueError (instead of KeyError for sources_by_{eid,uri} dict) in case the key
is not found.
^build$
^dist$
\.egg-info$
^.tox$
^.cache$
\.pyc$
\.pyo$
\.bak$
\.old$
\~$
\#.*?\#$
\.swp$
^doc/book/en/apidoc$
\.old$
\.pybuild
cubicweb/server/test/data/slapd.conf
debian/python-cubicweb
debian/*.log
debian/*.substvars
debian/cubicweb-doc
debian/cubicweb
debian/files
syntax: regexp
.*/data.*/database/.*
.*/data/ldapdb/.*
.*/data/uicache/
.*/data/libpython/cubicweb_.*/i18n/.*\.po
^doc/html/
^doc/doctrees/
^doc/book/en/devweb/js_api/
^doc/_build
^doc/js_api/
test-results.xml