Mercurial > p > roundup > code
annotate roundup/cgi/PageTemplates/PythonExpr.py @ 2077:3e0961d6d44d
Added the "actor" property.
Metakit backend not done (still not confident I know how it's supposed
to work ;)
Currently it will come up as NULL in the RDBMS backends for older items.
The *dbm backends will look up the journal. I hope to remedy the former
before 0.7's release.
Fixed a bunch of migration issues in the rdbms backends while I was at it
(index changes for key prop changes) and simplified the class table update
code for RDBMSes that have "alter table" in their command set (ie. not
sqlite) ... migration from "version 1" to "version 2" still hasn't
actually been tested yet though.
| author | Richard Jones <richard@users.sourceforge.net> |
|---|---|
| date | Mon, 15 Mar 2004 05:50:20 +0000 |
| parents | fc52d57c6c3e |
| children | b43efe461b3e |
| rev | line source |
|---|---|
| 1049 | 1 ############################################################################## |
| 2 # | |
| 3 # Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved. | |
| 4 # | |
| 5 # This software is subject to the provisions of the Zope Public License, | |
| 6 # Version 2.0 (ZPL). A copy of the ZPL should accompany this distribution. | |
| 7 # THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED | |
| 8 # WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 9 # WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS | |
| 10 # FOR A PARTICULAR PURPOSE | |
| 11 # | |
| 12 ############################################################################## | |
| 13 | |
| 14 """Generic Python Expression Handler | |
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15 |
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c08b3820edd1
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parents:
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16 Modified for Roundup 0.5 release: |
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c08b3820edd1
Adhering to ZPL
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parents:
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17 |
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c08b3820edd1
Adhering to ZPL
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parents:
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18 - more informative traceback info |
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c08b3820edd1
Adhering to ZPL
Richard Jones <richard@users.sourceforge.net>
parents:
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diff
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19 |
| 1049 | 20 """ |
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2005
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21 __docformat__ = 'restructuredtext' |
| 1049 | 22 |
|
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parents:
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23 __version__='$Revision: 1.5 $'[11:-2] |
| 1049 | 24 |
| 25 from TALES import CompilerError | |
| 26 from string import strip, split, join, replace, lstrip | |
| 27 from sys import exc_info | |
| 28 | |
| 29 class getSecurityManager: | |
| 30 '''Null security manager''' | |
| 31 def validate(self, *args, **kwargs): | |
| 32 return 1 | |
| 33 addContext = removeContext = validateValue = validate | |
| 34 | |
| 35 class PythonExpr: | |
| 36 def __init__(self, name, expr, engine): | |
| 37 self.expr = expr = replace(strip(expr), '\n', ' ') | |
| 38 try: | |
| 39 d = {} | |
| 40 exec 'def f():\n return %s\n' % strip(expr) in d | |
| 41 self._f = d['f'] | |
| 42 except: | |
| 43 raise CompilerError, ('Python expression error:\n' | |
| 44 '%s: %s') % exc_info()[:2] | |
| 45 self._get_used_names() | |
| 46 | |
| 47 def _get_used_names(self): | |
| 48 self._f_varnames = vnames = [] | |
| 49 for vname in self._f.func_code.co_names: | |
| 50 if vname[0] not in '$_': | |
| 51 vnames.append(vname) | |
| 52 | |
| 53 def _bind_used_names(self, econtext): | |
| 54 # Bind template variables | |
| 55 names = {} | |
| 56 vars = econtext.vars | |
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57 getType = econtext.getCompiler().getTypes().get |
| 1049 | 58 for vname in self._f_varnames: |
| 59 has, val = vars.has_get(vname) | |
| 60 if not has: | |
| 61 has = val = getType(vname) | |
| 62 if has: | |
| 63 val = ExprTypeProxy(vname, val, econtext) | |
| 64 if has: | |
| 65 names[vname] = val | |
| 66 return names | |
| 67 | |
| 68 def __call__(self, econtext): | |
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69 __traceback_info__ = 'python expression "%s"'%self.expr |
| 1049 | 70 f = self._f |
| 71 f.func_globals.update(self._bind_used_names(econtext)) | |
| 72 return f() | |
| 73 | |
| 74 def __str__(self): | |
| 75 return 'Python expression "%s"' % self.expr | |
| 76 def __repr__(self): | |
| 77 return '<PythonExpr %s>' % self.expr | |
| 78 | |
| 79 class ExprTypeProxy: | |
| 80 '''Class that proxies access to an expression type handler''' | |
| 81 def __init__(self, name, handler, econtext): | |
| 82 self._name = name | |
| 83 self._handler = handler | |
| 84 self._econtext = econtext | |
| 85 def __call__(self, text): | |
| 86 return self._handler(self._name, text, | |
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1257
93b80ad11ca8
merged Zope Collector #372 fix from ZPT CVS trunk
Richard Jones <richard@users.sourceforge.net>
parents:
1071
diff
changeset
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87 self._econtext.getCompiler())(self._econtext) |
| 1049 | 88 |