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annotate scripts/schema_diagram.py @ 4587:a2eb4fb3e6d8

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New Chameleon templating engine, engine is now configurable. We now have two configurable templating engines, the old Zope TAL templates (called zopetal in the config) and the new Chameleon (called chameleon in the config). A new config-option "template_engine" under [main] can take these config-options, the default is zopetal. Thanks to Cheer Xiao for the idea of making this configurable *and* for the actual implementation! Cheer Xiao commit log: - The original TAL engine ported from Zope is thereafter referred to as "zopetal", in speech and in code - A new option "template_engine" under [main] introduced - Zopetal-specific code stripped from cgi/templating.py to form the new cgi/engine_zopetal.py - Interface to Chameleon in cgi/engine_chameleon.py - Engines are supposed to provide a Templates class that mimics the behavior of the old cgi.templating.Templates. The Templates class is preferably subclassed from cgi.templating.TemplatesBase. - New function cgi.templating.get_templates to get the appropriate engine's Templates instance according to the engine name
author Ralf Schlatterbeck <rsc@runtux.com>
date Thu, 23 Feb 2012 18:10:03 +0100
parents d56b7fc64923
children 64b05e24dbd8
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Richard Jones <richard@users.sourceforge.net>
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1 #! /usr/bin/python
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2 #
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3 # Schema diagram generator contributed by Stefan Seefeld of the fresco
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4 # project http://www.fresco.org/.
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5 #
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6 # It generates a 'dot file' that is then fed into the 'dot'
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7 # tool (http://www.graphviz.org) to generate a graph:
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8 #
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9 # %> ./schema.py
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10 # %> dot -Tps schema.dot -o schema.ps
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11 # %> gv schema.ps
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12 #
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13 import sys
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14 import roundup.instance
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15
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16 # open the instance
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17 instance = roundup.instance.open(sys.argv[1])
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18 db = instance.open()
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19
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20 # diagram preamble
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21 print 'digraph schema {'
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22 print 'size="8,6"'
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23 print 'node [shape="record" bgcolor="#ffe4c4" style=filled]'
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24 print 'edge [taillabel="1" headlabel="1" dir=back arrowtail=ediamond]'
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25
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26 # get all the classes
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27 types = db.classes.keys()
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28
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29 # one record node per class
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30 for i in range(len(types)):
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31 print 'node%d [label=\"{%s|}"]'%(i, types[i])
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32
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33 # now draw in the relations
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34 for name in db.classes.keys():
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35 type = db.classes[name]
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36 attributes = type.getprops()
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37 for a in attributes.keys():
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38 attribute = attributes[a]
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39 if isinstance(attribute, roundup.hyperdb.Link):
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40 print 'node%d -> node%d [label=%s]'%(types.index(name),
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41 types.index(attribute.classname),
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42 a)
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43 elif isinstance(attribute, roundup.hyperdb.Multilink):
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44 print 'node%d -> node%d [taillabel="*" label=%s]'%(types.index(name),
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45 types.index(attribute.classname),
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46 a)
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47 # all done
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48 print '}'
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