1 #
2 # Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
3 # This module is free software, and you may redistribute it and/or modify
4 # under the same terms as Python, so long as this copyright message and
5 # disclaimer are retained in their original form.
6 #
7 # IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
8 # DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
9 # OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
10 # POSSIBILITY OF SUCH DAMAGE.
11 #
12 # BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
13 # BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
14 # FOR A PARTICULAR PURPOSE. THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
15 # BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
16 # SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.
17 #
18 # $Id: hyperdb.py,v 1.26 2001-10-16 03:48:01 richard Exp $
20 # standard python modules
21 import cPickle, re, string
23 # roundup modules
24 import date, password
27 #
28 # Types
29 #
30 class String:
31 """An object designating a String property."""
32 def __repr__(self):
33 return '<%s>'%self.__class__
35 class Password:
36 """An object designating a Password property."""
37 def __repr__(self):
38 return '<%s>'%self.__class__
40 class Date:
41 """An object designating a Date property."""
42 def __repr__(self):
43 return '<%s>'%self.__class__
45 class Interval:
46 """An object designating an Interval property."""
47 def __repr__(self):
48 return '<%s>'%self.__class__
50 class Link:
51 """An object designating a Link property that links to a
52 node in a specified class."""
53 def __init__(self, classname):
54 self.classname = classname
55 def __repr__(self):
56 return '<%s to "%s">'%(self.__class__, self.classname)
58 class Multilink:
59 """An object designating a Multilink property that links
60 to nodes in a specified class.
61 """
62 def __init__(self, classname):
63 self.classname = classname
64 def __repr__(self):
65 return '<%s to "%s">'%(self.__class__, self.classname)
67 class DatabaseError(ValueError):
68 pass
71 #
72 # the base Database class
73 #
74 class Database:
75 # flag to set on retired entries
76 RETIRED_FLAG = '__hyperdb_retired'
79 _marker = []
80 #
81 # The base Class class
82 #
83 class Class:
84 """The handle to a particular class of nodes in a hyperdatabase."""
86 def __init__(self, db, classname, **properties):
87 """Create a new class with a given name and property specification.
89 'classname' must not collide with the name of an existing class,
90 or a ValueError is raised. The keyword arguments in 'properties'
91 must map names to property objects, or a TypeError is raised.
92 """
93 self.classname = classname
94 self.properties = properties
95 self.db = db
96 self.key = ''
98 # do the db-related init stuff
99 db.addclass(self)
101 # Editing nodes:
103 def create(self, **propvalues):
104 """Create a new node of this class and return its id.
106 The keyword arguments in 'propvalues' map property names to values.
108 The values of arguments must be acceptable for the types of their
109 corresponding properties or a TypeError is raised.
111 If this class has a key property, it must be present and its value
112 must not collide with other key strings or a ValueError is raised.
114 Any other properties on this class that are missing from the
115 'propvalues' dictionary are set to None.
117 If an id in a link or multilink property does not refer to a valid
118 node, an IndexError is raised.
119 """
120 if propvalues.has_key('id'):
121 raise KeyError, '"id" is reserved'
123 if self.db.journaltag is None:
124 raise DatabaseError, 'Database open read-only'
126 # new node's id
127 newid = str(self.count() + 1)
129 # validate propvalues
130 num_re = re.compile('^\d+$')
131 for key, value in propvalues.items():
132 if key == self.key:
133 try:
134 self.lookup(value)
135 except KeyError:
136 pass
137 else:
138 raise ValueError, 'node with key "%s" exists'%value
140 # try to handle this property
141 try:
142 prop = self.properties[key]
143 except KeyError:
144 raise KeyError, '"%s" has no property "%s"'%(self.classname,
145 key)
147 if isinstance(prop, Link):
148 if type(value) != type(''):
149 raise ValueError, 'link value must be String'
150 link_class = self.properties[key].classname
151 # if it isn't a number, it's a key
152 if not num_re.match(value):
153 try:
154 value = self.db.classes[link_class].lookup(value)
155 except:
156 raise IndexError, 'new property "%s": %s not a %s'%(
157 key, value, self.properties[key].classname)
158 propvalues[key] = value
159 if not self.db.hasnode(link_class, value):
160 raise IndexError, '%s has no node %s'%(link_class, value)
162 # register the link with the newly linked node
163 self.db.addjournal(link_class, value, 'link',
164 (self.classname, newid, key))
166 elif isinstance(prop, Multilink):
167 if type(value) != type([]):
168 raise TypeError, 'new property "%s" not a list of ids'%key
169 link_class = self.properties[key].classname
170 l = []
171 for entry in value:
172 if type(entry) != type(''):
173 raise ValueError, 'link value must be String'
174 # if it isn't a number, it's a key
175 if not num_re.match(entry):
176 try:
177 entry = self.db.classes[link_class].lookup(entry)
178 except:
179 raise IndexError, 'new property "%s": %s not a %s'%(
180 key, entry, self.properties[key].classname)
181 l.append(entry)
182 value = l
183 propvalues[key] = value
185 # handle additions
186 for id in value:
187 if not self.db.hasnode(link_class, id):
188 raise IndexError, '%s has no node %s'%(link_class, id)
189 # register the link with the newly linked node
190 self.db.addjournal(link_class, id, 'link',
191 (self.classname, newid, key))
193 elif isinstance(prop, String):
194 if type(value) != type(''):
195 raise TypeError, 'new property "%s" not a string'%key
197 elif isinstance(prop, Password):
198 if not isinstance(value, password.Password):
199 raise TypeError, 'new property "%s" not a Password'%key
201 elif isinstance(prop, Date):
202 if not isinstance(value, date.Date):
203 raise TypeError, 'new property "%s" not a Date'%key
205 elif isinstance(prop, Interval):
206 if not isinstance(value, date.Interval):
207 raise TypeError, 'new property "%s" not an Interval'%key
209 # make sure there's data where there needs to be
210 for key, prop in self.properties.items():
211 if propvalues.has_key(key):
212 continue
213 if key == self.key:
214 raise ValueError, 'key property "%s" is required'%key
215 if isinstance(prop, Multilink):
216 propvalues[key] = []
217 else:
218 propvalues[key] = None
220 # convert all data to strings
221 for key, prop in self.properties.items():
222 if isinstance(prop, Date):
223 propvalues[key] = propvalues[key].get_tuple()
224 elif isinstance(prop, Interval):
225 propvalues[key] = propvalues[key].get_tuple()
226 elif isinstance(prop, Password):
227 propvalues[key] = str(propvalues[key])
229 # done
230 self.db.addnode(self.classname, newid, propvalues)
231 self.db.addjournal(self.classname, newid, 'create', propvalues)
232 return newid
234 def get(self, nodeid, propname, default=_marker):
235 """Get the value of a property on an existing node of this class.
237 'nodeid' must be the id of an existing node of this class or an
238 IndexError is raised. 'propname' must be the name of a property
239 of this class or a KeyError is raised.
240 """
241 d = self.db.getnode(self.classname, nodeid)
243 # convert the marshalled data to instances
244 for key, prop in self.properties.items():
245 if isinstance(prop, Date):
246 d[key] = date.Date(d[key])
247 elif isinstance(prop, Interval):
248 d[key] = date.Interval(d[key])
249 elif isinstance(prop, Password):
250 p = password.Password()
251 p.unpack(d[key])
252 d[key] = p
254 if propname == 'id':
255 return nodeid
256 if not d.has_key(propname) and default is not _marker:
257 return default
258 return d[propname]
260 # XXX not in spec
261 def getnode(self, nodeid):
262 ''' Return a convenience wrapper for the node
263 '''
264 return Node(self, nodeid)
266 def set(self, nodeid, **propvalues):
267 """Modify a property on an existing node of this class.
269 'nodeid' must be the id of an existing node of this class or an
270 IndexError is raised.
272 Each key in 'propvalues' must be the name of a property of this
273 class or a KeyError is raised.
275 All values in 'propvalues' must be acceptable types for their
276 corresponding properties or a TypeError is raised.
278 If the value of the key property is set, it must not collide with
279 other key strings or a ValueError is raised.
281 If the value of a Link or Multilink property contains an invalid
282 node id, a ValueError is raised.
283 """
284 if not propvalues:
285 return
287 if propvalues.has_key('id'):
288 raise KeyError, '"id" is reserved'
290 if self.db.journaltag is None:
291 raise DatabaseError, 'Database open read-only'
293 node = self.db.getnode(self.classname, nodeid)
294 if node.has_key(self.db.RETIRED_FLAG):
295 raise IndexError
296 num_re = re.compile('^\d+$')
297 for key, value in propvalues.items():
298 if not node.has_key(key):
299 raise KeyError, key
301 # check to make sure we're not duplicating an existing key
302 if key == self.key and node[key] != value:
303 try:
304 self.lookup(value)
305 except KeyError:
306 pass
307 else:
308 raise ValueError, 'node with key "%s" exists'%value
310 prop = self.properties[key]
312 if isinstance(prop, Link):
313 link_class = self.properties[key].classname
314 # if it isn't a number, it's a key
315 if type(value) != type(''):
316 raise ValueError, 'link value must be String'
317 if not num_re.match(value):
318 try:
319 value = self.db.classes[link_class].lookup(value)
320 except:
321 raise IndexError, 'new property "%s": %s not a %s'%(
322 key, value, self.properties[key].classname)
324 if not self.db.hasnode(link_class, value):
325 raise IndexError, '%s has no node %s'%(link_class, value)
327 # register the unlink with the old linked node
328 if node[key] is not None:
329 self.db.addjournal(link_class, node[key], 'unlink',
330 (self.classname, nodeid, key))
332 # register the link with the newly linked node
333 if value is not None:
334 self.db.addjournal(link_class, value, 'link',
335 (self.classname, nodeid, key))
337 elif isinstance(prop, Multilink):
338 if type(value) != type([]):
339 raise TypeError, 'new property "%s" not a list of ids'%key
340 link_class = self.properties[key].classname
341 l = []
342 for entry in value:
343 # if it isn't a number, it's a key
344 if type(entry) != type(''):
345 raise ValueError, 'link value must be String'
346 if not num_re.match(entry):
347 try:
348 entry = self.db.classes[link_class].lookup(entry)
349 except:
350 raise IndexError, 'new property "%s": %s not a %s'%(
351 key, entry, self.properties[key].classname)
352 l.append(entry)
353 value = l
354 propvalues[key] = value
356 #handle removals
357 l = node[key]
358 for id in l[:]:
359 if id in value:
360 continue
361 # register the unlink with the old linked node
362 self.db.addjournal(link_class, id, 'unlink',
363 (self.classname, nodeid, key))
364 l.remove(id)
366 # handle additions
367 for id in value:
368 if not self.db.hasnode(link_class, id):
369 raise IndexError, '%s has no node %s'%(link_class, id)
370 if id in l:
371 continue
372 # register the link with the newly linked node
373 self.db.addjournal(link_class, id, 'link',
374 (self.classname, nodeid, key))
375 l.append(id)
377 elif isinstance(prop, String):
378 if value is not None and type(value) != type(''):
379 raise TypeError, 'new property "%s" not a string'%key
381 elif isinstance(prop, Password):
382 if not isinstance(value, password.Password):
383 raise TypeError, 'new property "%s" not a Password'% key
384 propvalues[key] = value = str(value)
386 elif isinstance(prop, Date):
387 if not isinstance(value, date.Date):
388 raise TypeError, 'new property "%s" not a Date'% key
389 propvalues[key] = value = value.get_tuple()
391 elif isinstance(prop, Interval):
392 if not isinstance(value, date.Interval):
393 raise TypeError, 'new property "%s" not an Interval'% key
394 propvalues[key] = value = value.get_tuple()
396 node[key] = value
398 self.db.setnode(self.classname, nodeid, node)
399 self.db.addjournal(self.classname, nodeid, 'set', propvalues)
401 def retire(self, nodeid):
402 """Retire a node.
404 The properties on the node remain available from the get() method,
405 and the node's id is never reused.
407 Retired nodes are not returned by the find(), list(), or lookup()
408 methods, and other nodes may reuse the values of their key properties.
409 """
410 if self.db.journaltag is None:
411 raise DatabaseError, 'Database open read-only'
412 node = self.db.getnode(self.classname, nodeid)
413 node[self.db.RETIRED_FLAG] = 1
414 self.db.setnode(self.classname, nodeid, node)
415 self.db.addjournal(self.classname, nodeid, 'retired', None)
417 def history(self, nodeid):
418 """Retrieve the journal of edits on a particular node.
420 'nodeid' must be the id of an existing node of this class or an
421 IndexError is raised.
423 The returned list contains tuples of the form
425 (date, tag, action, params)
427 'date' is a Timestamp object specifying the time of the change and
428 'tag' is the journaltag specified when the database was opened.
429 """
430 return self.db.getjournal(self.classname, nodeid)
432 # Locating nodes:
434 def setkey(self, propname):
435 """Select a String property of this class to be the key property.
437 'propname' must be the name of a String property of this class or
438 None, or a TypeError is raised. The values of the key property on
439 all existing nodes must be unique or a ValueError is raised.
440 """
441 # TODO: validate that the property is a String!
442 self.key = propname
444 def getkey(self):
445 """Return the name of the key property for this class or None."""
446 return self.key
448 def labelprop(self, default_to_id=0):
449 ''' Return the property name for a label for the given node.
451 This method attempts to generate a consistent label for the node.
452 It tries the following in order:
453 1. key property
454 2. "name" property
455 3. "title" property
456 4. first property from the sorted property name list
457 '''
458 k = self.getkey()
459 if k:
460 return k
461 props = self.getprops()
462 if props.has_key('name'):
463 return 'name'
464 elif props.has_key('title'):
465 return 'title'
466 if default_to_id:
467 return 'id'
468 props = props.keys()
469 props.sort()
470 return props[0]
472 # TODO: set up a separate index db file for this? profile?
473 def lookup(self, keyvalue):
474 """Locate a particular node by its key property and return its id.
476 If this class has no key property, a TypeError is raised. If the
477 'keyvalue' matches one of the values for the key property among
478 the nodes in this class, the matching node's id is returned;
479 otherwise a KeyError is raised.
480 """
481 cldb = self.db.getclassdb(self.classname)
482 for nodeid in self.db.getnodeids(self.classname, cldb):
483 node = self.db.getnode(self.classname, nodeid, cldb)
484 if node.has_key(self.db.RETIRED_FLAG):
485 continue
486 if node[self.key] == keyvalue:
487 return nodeid
488 cldb.close()
489 raise KeyError, keyvalue
491 # XXX: change from spec - allows multiple props to match
492 def find(self, **propspec):
493 """Get the ids of nodes in this class which link to a given node.
495 'propspec' consists of keyword args propname=nodeid
496 'propname' must be the name of a property in this class, or a
497 KeyError is raised. That property must be a Link or Multilink
498 property, or a TypeError is raised.
500 'nodeid' must be the id of an existing node in the class linked
501 to by the given property, or an IndexError is raised.
502 """
503 propspec = propspec.items()
504 for propname, nodeid in propspec:
505 # check the prop is OK
506 prop = self.properties[propname]
507 if not isinstance(prop, Link) and not isinstance(prop, Multilink):
508 raise TypeError, "'%s' not a Link/Multilink property"%propname
509 if not self.db.hasnode(prop.classname, nodeid):
510 raise ValueError, '%s has no node %s'%(link_class, nodeid)
512 # ok, now do the find
513 cldb = self.db.getclassdb(self.classname)
514 l = []
515 for id in self.db.getnodeids(self.classname, cldb):
516 node = self.db.getnode(self.classname, id, cldb)
517 if node.has_key(self.db.RETIRED_FLAG):
518 continue
519 for propname, nodeid in propspec:
520 property = node[propname]
521 if isinstance(prop, Link) and nodeid == property:
522 l.append(id)
523 elif isinstance(prop, Multilink) and nodeid in property:
524 l.append(id)
525 cldb.close()
526 return l
528 def stringFind(self, **requirements):
529 """Locate a particular node by matching a set of its String properties.
531 If the property is not a String property, a TypeError is raised.
533 The return is a list of the id of all nodes that match.
534 """
535 for propname in requirements.keys():
536 prop = self.properties[propname]
537 if isinstance(not prop, String):
538 raise TypeError, "'%s' not a String property"%propname
539 l = []
540 cldb = self.db.getclassdb(self.classname)
541 for nodeid in self.db.getnodeids(self.classname, cldb):
542 node = self.db.getnode(self.classname, nodeid, cldb)
543 if node.has_key(self.db.RETIRED_FLAG):
544 continue
545 for key, value in requirements.items():
546 if node[key] != value:
547 break
548 else:
549 l.append(nodeid)
550 cldb.close()
551 return l
553 def list(self):
554 """Return a list of the ids of the active nodes in this class."""
555 l = []
556 cn = self.classname
557 cldb = self.db.getclassdb(cn)
558 for nodeid in self.db.getnodeids(cn, cldb):
559 node = self.db.getnode(cn, nodeid, cldb)
560 if node.has_key(self.db.RETIRED_FLAG):
561 continue
562 l.append(nodeid)
563 l.sort()
564 cldb.close()
565 return l
567 # XXX not in spec
568 def filter(self, filterspec, sort, group, num_re = re.compile('^\d+$')):
569 ''' Return a list of the ids of the active nodes in this class that
570 match the 'filter' spec, sorted by the group spec and then the
571 sort spec
572 '''
573 cn = self.classname
575 # optimise filterspec
576 l = []
577 props = self.getprops()
578 for k, v in filterspec.items():
579 propclass = props[k]
580 if isinstance(propclass, Link):
581 if type(v) is not type([]):
582 v = [v]
583 # replace key values with node ids
584 u = []
585 link_class = self.db.classes[propclass.classname]
586 for entry in v:
587 if not num_re.match(entry):
588 try:
589 entry = link_class.lookup(entry)
590 except:
591 raise ValueError, 'new property "%s": %s not a %s'%(
592 k, entry, self.properties[k].classname)
593 u.append(entry)
595 l.append((0, k, u))
596 elif isinstance(propclass, Multilink):
597 if type(v) is not type([]):
598 v = [v]
599 # replace key values with node ids
600 u = []
601 link_class = self.db.classes[propclass.classname]
602 for entry in v:
603 if not num_re.match(entry):
604 try:
605 entry = link_class.lookup(entry)
606 except:
607 raise ValueError, 'new property "%s": %s not a %s'%(
608 k, entry, self.properties[k].classname)
609 u.append(entry)
610 l.append((1, k, u))
611 elif isinstance(propclass, String):
612 # simple glob searching
613 v = re.sub(r'([\|\{\}\\\.\+\[\]\(\)])', r'\\\1', v)
614 v = v.replace('?', '.')
615 v = v.replace('*', '.*?')
616 l.append((2, k, re.compile(v, re.I)))
617 else:
618 l.append((6, k, v))
619 filterspec = l
621 # now, find all the nodes that are active and pass filtering
622 l = []
623 cldb = self.db.getclassdb(cn)
624 for nodeid in self.db.getnodeids(cn, cldb):
625 node = self.db.getnode(cn, nodeid, cldb)
626 if node.has_key(self.db.RETIRED_FLAG):
627 continue
628 # apply filter
629 for t, k, v in filterspec:
630 if t == 0 and node[k] not in v:
631 # link - if this node'd property doesn't appear in the
632 # filterspec's nodeid list, skip it
633 break
634 elif t == 1:
635 # multilink - if any of the nodeids required by the
636 # filterspec aren't in this node's property, then skip
637 # it
638 for value in v:
639 if value not in node[k]:
640 break
641 else:
642 continue
643 break
644 elif t == 2 and not v.search(node[k]):
645 # RE search
646 break
647 elif t == 6 and node[k] != v:
648 # straight value comparison for the other types
649 break
650 else:
651 l.append((nodeid, node))
652 l.sort()
653 cldb.close()
655 # optimise sort
656 m = []
657 for entry in sort:
658 if entry[0] != '-':
659 m.append(('+', entry))
660 else:
661 m.append((entry[0], entry[1:]))
662 sort = m
664 # optimise group
665 m = []
666 for entry in group:
667 if entry[0] != '-':
668 m.append(('+', entry))
669 else:
670 m.append((entry[0], entry[1:]))
671 group = m
672 # now, sort the result
673 def sortfun(a, b, sort=sort, group=group, properties=self.getprops(),
674 db = self.db, cl=self):
675 a_id, an = a
676 b_id, bn = b
677 # sort by group and then sort
678 for list in group, sort:
679 for dir, prop in list:
680 # handle the properties that might be "faked"
681 if not an.has_key(prop):
682 an[prop] = cl.get(a_id, prop)
683 av = an[prop]
684 if not bn.has_key(prop):
685 bn[prop] = cl.get(b_id, prop)
686 bv = bn[prop]
688 # sorting is class-specific
689 propclass = properties[prop]
691 # String and Date values are sorted in the natural way
692 if isinstance(propclass, String):
693 # clean up the strings
694 if av and av[0] in string.uppercase:
695 av = an[prop] = av.lower()
696 if bv and bv[0] in string.uppercase:
697 bv = bn[prop] = bv.lower()
698 if (isinstance(propclass, String) or
699 isinstance(propclass, Date)):
700 if dir == '+':
701 r = cmp(av, bv)
702 if r != 0: return r
703 elif dir == '-':
704 r = cmp(bv, av)
705 if r != 0: return r
707 # Link properties are sorted according to the value of
708 # the "order" property on the linked nodes if it is
709 # present; or otherwise on the key string of the linked
710 # nodes; or finally on the node ids.
711 elif isinstance(propclass, Link):
712 link = db.classes[propclass.classname]
713 if av is None and bv is not None: return -1
714 if av is not None and bv is None: return 1
715 if av is None and bv is None: return 0
716 if link.getprops().has_key('order'):
717 if dir == '+':
718 r = cmp(link.get(av, 'order'),
719 link.get(bv, 'order'))
720 if r != 0: return r
721 elif dir == '-':
722 r = cmp(link.get(bv, 'order'),
723 link.get(av, 'order'))
724 if r != 0: return r
725 elif link.getkey():
726 key = link.getkey()
727 if dir == '+':
728 r = cmp(link.get(av, key), link.get(bv, key))
729 if r != 0: return r
730 elif dir == '-':
731 r = cmp(link.get(bv, key), link.get(av, key))
732 if r != 0: return r
733 else:
734 if dir == '+':
735 r = cmp(av, bv)
736 if r != 0: return r
737 elif dir == '-':
738 r = cmp(bv, av)
739 if r != 0: return r
741 # Multilink properties are sorted according to how many
742 # links are present.
743 elif isinstance(propclass, Multilink):
744 if dir == '+':
745 r = cmp(len(av), len(bv))
746 if r != 0: return r
747 elif dir == '-':
748 r = cmp(len(bv), len(av))
749 if r != 0: return r
750 # end for dir, prop in list:
751 # end for list in sort, group:
752 # if all else fails, compare the ids
753 return cmp(a[0], b[0])
755 l.sort(sortfun)
756 return [i[0] for i in l]
758 def count(self):
759 """Get the number of nodes in this class.
761 If the returned integer is 'numnodes', the ids of all the nodes
762 in this class run from 1 to numnodes, and numnodes+1 will be the
763 id of the next node to be created in this class.
764 """
765 return self.db.countnodes(self.classname)
767 # Manipulating properties:
769 def getprops(self, protected=1):
770 """Return a dictionary mapping property names to property objects.
771 If the "protected" flag is true, we include protected properties -
772 those which may not be modified."""
773 d = self.properties.copy()
774 if protected:
775 d['id'] = String()
776 return d
778 def addprop(self, **properties):
779 """Add properties to this class.
781 The keyword arguments in 'properties' must map names to property
782 objects, or a TypeError is raised. None of the keys in 'properties'
783 may collide with the names of existing properties, or a ValueError
784 is raised before any properties have been added.
785 """
786 for key in properties.keys():
787 if self.properties.has_key(key):
788 raise ValueError, key
789 self.properties.update(properties)
792 # XXX not in spec
793 class Node:
794 ''' A convenience wrapper for the given node
795 '''
796 def __init__(self, cl, nodeid):
797 self.__dict__['cl'] = cl
798 self.__dict__['nodeid'] = nodeid
799 def keys(self, protected=1):
800 return self.cl.getprops(protected=protected).keys()
801 def values(self, protected=1):
802 l = []
803 for name in self.cl.getprops(protected=protected).keys():
804 l.append(self.cl.get(self.nodeid, name))
805 return l
806 def items(self, protected=1):
807 l = []
808 for name in self.cl.getprops(protected=protected).keys():
809 l.append((name, self.cl.get(self.nodeid, name)))
810 return l
811 def has_key(self, name):
812 return self.cl.getprops().has_key(name)
813 def __getattr__(self, name):
814 if self.__dict__.has_key(name):
815 return self.__dict__[name]
816 try:
817 return self.cl.get(self.nodeid, name)
818 except KeyError, value:
819 raise AttributeError, str(value)
820 def __getitem__(self, name):
821 return self.cl.get(self.nodeid, name)
822 def __setattr__(self, name, value):
823 try:
824 return self.cl.set(self.nodeid, **{name: value})
825 except KeyError, value:
826 raise AttributeError, str(value)
827 def __setitem__(self, name, value):
828 self.cl.set(self.nodeid, **{name: value})
829 def history(self):
830 return self.cl.history(self.nodeid)
831 def retire(self):
832 return self.cl.retire(self.nodeid)
835 def Choice(name, *options):
836 cl = Class(db, name, name=hyperdb.String(), order=hyperdb.String())
837 for i in range(len(options)):
838 cl.create(name=option[i], order=i)
839 return hyperdb.Link(name)
841 #
842 # $Log: not supported by cvs2svn $
843 # Revision 1.25 2001/10/11 00:17:51 richard
844 # Reverted a change in hyperdb so the default value for missing property
845 # values in a create() is None and not '' (the empty string.) This obviously
846 # breaks CSV import/export - the string 'None' will be created in an
847 # export/import operation.
848 #
849 # Revision 1.24 2001/10/10 03:54:57 richard
850 # Added database importing and exporting through CSV files.
851 # Uses the csv module from object-craft for exporting if it's available.
852 # Requires the csv module for importing.
853 #
854 # Revision 1.23 2001/10/09 23:58:10 richard
855 # Moved the data stringification up into the hyperdb.Class class' get, set
856 # and create methods. This means that the data is also stringified for the
857 # journal call, and removes duplication of code from the backends. The
858 # backend code now only sees strings.
859 #
860 # Revision 1.22 2001/10/09 07:25:59 richard
861 # Added the Password property type. See "pydoc roundup.password" for
862 # implementation details. Have updated some of the documentation too.
863 #
864 # Revision 1.21 2001/10/05 02:23:24 richard
865 # . roundup-admin create now prompts for property info if none is supplied
866 # on the command-line.
867 # . hyperdb Class getprops() method may now return only the mutable
868 # properties.
869 # . Login now uses cookies, which makes it a whole lot more flexible. We can
870 # now support anonymous user access (read-only, unless there's an
871 # "anonymous" user, in which case write access is permitted). Login
872 # handling has been moved into cgi_client.Client.main()
873 # . The "extended" schema is now the default in roundup init.
874 # . The schemas have had their page headings modified to cope with the new
875 # login handling. Existing installations should copy the interfaces.py
876 # file from the roundup lib directory to their instance home.
877 # . Incorrectly had a Bizar Software copyright on the cgitb.py module from
878 # Ping - has been removed.
879 # . Fixed a whole bunch of places in the CGI interface where we should have
880 # been returning Not Found instead of throwing an exception.
881 # . Fixed a deviation from the spec: trying to modify the 'id' property of
882 # an item now throws an exception.
883 #
884 # Revision 1.20 2001/10/04 02:12:42 richard
885 # Added nicer command-line item adding: passing no arguments will enter an
886 # interactive more which asks for each property in turn. While I was at it, I
887 # fixed an implementation problem WRT the spec - I wasn't raising a
888 # ValueError if the key property was missing from a create(). Also added a
889 # protected=boolean argument to getprops() so we can list only the mutable
890 # properties (defaults to yes, which lists the immutables).
891 #
892 # Revision 1.19 2001/08/29 04:47:18 richard
893 # Fixed CGI client change messages so they actually include the properties
894 # changed (again).
895 #
896 # Revision 1.18 2001/08/16 07:34:59 richard
897 # better CGI text searching - but hidden filter fields are disappearing...
898 #
899 # Revision 1.17 2001/08/16 06:59:58 richard
900 # all searches use re now - and they're all case insensitive
901 #
902 # Revision 1.16 2001/08/15 23:43:18 richard
903 # Fixed some isFooTypes that I missed.
904 # Refactored some code in the CGI code.
905 #
906 # Revision 1.15 2001/08/12 06:32:36 richard
907 # using isinstance(blah, Foo) now instead of isFooType
908 #
909 # Revision 1.14 2001/08/07 00:24:42 richard
910 # stupid typo
911 #
912 # Revision 1.13 2001/08/07 00:15:51 richard
913 # Added the copyright/license notice to (nearly) all files at request of
914 # Bizar Software.
915 #
916 # Revision 1.12 2001/08/02 06:38:17 richard
917 # Roundupdb now appends "mailing list" information to its messages which
918 # include the e-mail address and web interface address. Templates may
919 # override this in their db classes to include specific information (support
920 # instructions, etc).
921 #
922 # Revision 1.11 2001/08/01 04:24:21 richard
923 # mailgw was assuming certain properties existed on the issues being created.
924 #
925 # Revision 1.10 2001/07/30 02:38:31 richard
926 # get() now has a default arg - for migration only.
927 #
928 # Revision 1.9 2001/07/29 09:28:23 richard
929 # Fixed sorting by clicking on column headings.
930 #
931 # Revision 1.8 2001/07/29 08:27:40 richard
932 # Fixed handling of passed-in values in form elements (ie. during a
933 # drill-down)
934 #
935 # Revision 1.7 2001/07/29 07:01:39 richard
936 # Added vim command to all source so that we don't get no steenkin' tabs :)
937 #
938 # Revision 1.6 2001/07/29 05:36:14 richard
939 # Cleanup of the link label generation.
940 #
941 # Revision 1.5 2001/07/29 04:05:37 richard
942 # Added the fabricated property "id".
943 #
944 # Revision 1.4 2001/07/27 06:25:35 richard
945 # Fixed some of the exceptions so they're the right type.
946 # Removed the str()-ification of node ids so we don't mask oopsy errors any
947 # more.
948 #
949 # Revision 1.3 2001/07/27 05:17:14 richard
950 # just some comments
951 #
952 # Revision 1.2 2001/07/22 12:09:32 richard
953 # Final commit of Grande Splite
954 #
955 # Revision 1.1 2001/07/22 11:58:35 richard
956 # More Grande Splite
957 #
958 #
959 # vim: set filetype=python ts=4 sw=4 et si