-
Notifications
You must be signed in to change notification settings - Fork 2k
/
package.py
542 lines (490 loc) · 23.7 KB
/
package.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
import datetime
from time import gmtime
from calendar import timegm
from sqlalchemy.sql import select, and_, union, expression, or_
from sqlalchemy.orm import eagerload_all
from sqlalchemy import types, Column, Table
from pylons import config
from meta import metadata, Session
import vdm.sqlalchemy
from types import make_uuid, iso_date_to_datetime_for_sqlite
from core import make_revisioned_table, Revision, State
from license import License, LicenseRegister
from domain_object import DomainObject
import ckan.misc
__all__ = ['Package', 'package_table', 'package_revision_table',
'PACKAGE_NAME_MAX_LENGTH', 'PACKAGE_NAME_MIN_LENGTH',
'PACKAGE_VERSION_MAX_LENGTH']
PACKAGE_NAME_MAX_LENGTH = 100
PACKAGE_NAME_MIN_LENGTH = 2
PACKAGE_VERSION_MAX_LENGTH = 100
## Our Domain Object Tables
package_table = Table('package', metadata,
Column('id', types.UnicodeText, primary_key=True, default=make_uuid),
Column('name', types.Unicode(PACKAGE_NAME_MAX_LENGTH),
nullable=False, unique=True),
Column('title', types.UnicodeText),
Column('version', types.Unicode(PACKAGE_VERSION_MAX_LENGTH)),
Column('url', types.UnicodeText),
Column('author', types.UnicodeText),
Column('author_email', types.UnicodeText),
Column('maintainer', types.UnicodeText),
Column('maintainer_email', types.UnicodeText),
Column('notes', types.UnicodeText),
Column('license_id', types.UnicodeText),
Column('language', types.UnicodeText, default=u'en'),
)
vdm.sqlalchemy.make_table_stateful(package_table)
package_revision_table = make_revisioned_table(package_table)
## -------------------
## Mapped classes
class Package(vdm.sqlalchemy.RevisionedObjectMixin,
vdm.sqlalchemy.StatefulObjectMixin,
DomainObject):
text_search_fields = ['name', 'title']
def __init__(self, **kw):
from ckan import model
super(Package, self).__init__(**kw)
resource_group = model.ResourceGroup(label="default")
self.resource_groups.append(resource_group)
@classmethod
def search_by_name(cls, text_query):
text_query = text_query
return Session.query(cls).filter(cls.name.contains(text_query.lower()))
@classmethod
def get(cls, reference):
'''Returns a package object referenced by its id or name.'''
query = Session.query(cls).filter(cls.id==reference)
query = query.options(eagerload_all('package_tags.tag'))
query = query.options(eagerload_all('resource_groups_all.resources_all'))
pkg = query.first()
if pkg == None:
pkg = cls.by_name(reference)
return pkg
# Todo: Make sure package names can't be changed to look like package IDs?
@property
def resources(self):
if len(self.resource_groups_all) == 0:
return []
assert len(self.resource_groups_all) == 1, "can only use resources on packages if there is only one resource_group"
return self.resource_groups_all[0].resources
def update_resources(self, res_dicts, autoflush=True):
'''Change this package\'s resources.
@param res_dicts - ordered list of dicts, each detailing a resource
The resource dictionaries contain 'url', 'format' etc. Optionally they
can also provide the 'id' of the Resource, to help matching
res_dicts to existing Resources. Otherwise, it searches
for an otherwise exactly matching Resource.
The caller is responsible for creating a revision and committing.'''
from ckan import model
assert isinstance(res_dicts, (list, tuple))
# Map the incoming res_dicts (by index) to existing resources
index_to_res = {}
# Match up the res_dicts by id
def get_resource_identity(resource_obj_or_dict):
if isinstance(resource_obj_or_dict, dict):
# Convert dict into a Resource object, since that ensures
# all columns exist when you redictize it. This object is
# garbage collected as it isn't added to the Session.
res_keys = set(resource_obj_or_dict.keys()) - \
set(('id', 'position'))
res_dict = dict([(res_key, resource_obj_or_dict[res_key]) \
for res_key in res_keys])
resource = model.Resource(**res_dict)
else:
resource = resource_obj_or_dict
res_dict = resource.as_dict(core_columns_only=True)
return res_dict
existing_res_identites = [get_resource_identity(res) \
for res in self.resources]
for i, res_dict in enumerate(res_dicts):
assert isinstance(res_dict, dict)
id = res_dict.get('id')
if id:
res = Session.query(model.Resource).autoflush(autoflush).get(id)
if res:
index_to_res[i] = res
else:
res_identity = get_resource_identity(res_dict)
try:
matching_res_index = existing_res_identites.index(res_identity)
except ValueError:
continue
index_to_res[i] = self.resources[matching_res_index]
# Edit resources and create the new ones
new_res_list = []
for i, res_dict in enumerate(res_dicts):
if i in index_to_res:
res = index_to_res[i]
for col in set(res_dict.keys()) - set(('id', 'position')):
setattr(res, col, res_dict[col])
else:
# ignore particular keys that disrupt creation of new resource
for key in set(res_dict.keys()) & set(('id', 'position')):
del res_dict[key]
res = model.Resource(**res_dict)
model.Session.add(res)
new_res_list.append(res)
self.resource_groups[0].resources = new_res_list
def related_packages(self):
return [self]
def add_resource(self, url, format=u'', description=u'', hash=u'', **kw):
import resource
self.resources.append(resource.Resource(
resource_group_id=self.resource_groups[0].id,
url=url,
format=format,
description=description,
hash=hash,
**kw))
def add_tag_by_name(self, tagname, autoflush=True):
from tag import Tag
if not tagname:
return
tag = Tag.by_name(tagname, autoflush=autoflush)
if not tag:
tag = Tag(name=tagname)
if not tag in self.tags:
self.tags.append(tag)
@property
def tags_ordered(self):
ourcmp = lambda tag1, tag2: cmp(tag1.name, tag2.name)
return sorted(self.tags, cmp=ourcmp)
def isopen(self):
if self.license and self.license.isopen():
return True
return False
def get_average_rating(self):
total = 0
for rating in self.ratings:
total += rating.rating
if total == 0:
return None
else:
return total / len(self.ratings)
def as_dict(self, ref_package_by='name', ref_group_by='name'):
_dict = DomainObject.as_dict(self)
# Set 'license' in _dict to cater for old clients.
# Todo: Remove from Version 2?
_dict['license'] = self.license.title if self.license else _dict.get('license_id', '')
_dict['isopen'] = self.isopen()
tags = [tag.name for tag in self.tags]
tags.sort() # so it is determinable
_dict['tags'] = tags
groups = [getattr(group, ref_group_by) for group in self.get_groups()]
groups.sort()
_dict['groups'] = groups
_dict['extras'] = dict([(key, value) for key, value in self.extras.items()])
_dict['ratings_average'] = self.get_average_rating()
_dict['ratings_count'] = len(self.ratings)
_dict['resources'] = [res.as_dict(core_columns_only=False) \
for res in self.resources]
site_url = config.get('ckan.site_url', None)
if site_url:
_dict['ckan_url'] = '%s/dataset/%s' % (site_url, self.name)
_dict['relationships'] = [rel.as_dict(self, ref_package_by=ref_package_by) for rel in self.get_relationships()]
_dict['metadata_modified'] = self.metadata_modified.isoformat() \
if self.metadata_modified else None
_dict['metadata_created'] = self.metadata_created.isoformat() \
if self.metadata_created else None
_dict['notes_rendered'] = ckan.misc.MarkdownFormat().to_html(self.notes)
return _dict
def add_relationship(self, type_, related_package, comment=u''):
'''Creates a new relationship between this package and a
related_package. It leaves the caller to commit the change.'''
import package_relationship
from ckan import model
if type_ in package_relationship.PackageRelationship.get_forward_types():
subject = self
object_ = related_package
elif type_ in package_relationship.PackageRelationship.get_reverse_types():
type_ = package_relationship.PackageRelationship.reverse_to_forward_type(type_)
assert type_
subject = related_package
object_ = self
else:
raise KeyError, 'Package relationship type: %r' % type_
rels = self.get_relationships(with_package=related_package,
type=type_, active=False, direction="forward")
if rels:
rel = rels[0]
if comment:
rel.comment=comment
if rel.state == model.State.DELETED:
rel.undelete()
else:
rel = package_relationship.PackageRelationship(
subject=subject,
object=object_,
type=type_,
comment=comment)
Session.add(rel)
return rel
def get_relationships(self, with_package=None, type=None, active=True,
direction='both'):
'''Returns relationships this package has.
Keeps stored type/ordering (not from pov of self).'''
assert direction in ('both', 'forward', 'reverse')
if with_package:
assert isinstance(with_package, Package)
from package_relationship import PackageRelationship
forward_filters = [PackageRelationship.subject==self]
reverse_filters = [PackageRelationship.object==self]
if with_package:
forward_filters.append(PackageRelationship.object==with_package)
reverse_filters.append(PackageRelationship.subject==with_package)
if active:
forward_filters.append(PackageRelationship.state==State.ACTIVE)
reverse_filters.append(PackageRelationship.state==State.ACTIVE)
if type:
forward_filters.append(PackageRelationship.type==type)
reverse_type = PackageRelationship.reverse_type(type)
reverse_filters.append(PackageRelationship.type==reverse_type)
q = Session.query(PackageRelationship)
if direction == 'both':
q = q.filter(or_(
and_(*forward_filters),
and_(*reverse_filters),
))
elif direction == 'forward':
q = q.filter(and_(*forward_filters))
elif direction == 'reverse':
q = q.filter(and_(*reverse_filters))
return q.all()
def get_relationships_with(self, other_package, type=None, active=True):
return self.get_relationships(with_package=other_package,
type=type,
active=active)
def get_relationships_printable(self):
'''Returns a list of tuples describing related packages, including
non-direct relationships (such as siblings).
@return: e.g. [(annakarenina, u"is a parent"), ...]
'''
from package_relationship import PackageRelationship
rel_list = []
for rel in self.get_relationships():
if rel.subject == self:
type_printable = PackageRelationship.make_type_printable(rel.type)
rel_list.append((rel.object, type_printable, rel.comment))
else:
type_printable = PackageRelationship.make_type_printable(\
PackageRelationship.forward_to_reverse_type(
rel.type)
)
rel_list.append((rel.subject, type_printable, rel.comment))
# sibling types
# e.g. 'gary' is a child of 'mum', looking for 'bert' is a child of 'mum'
# i.e. for each 'child_of' type relationship ...
for rel_as_subject in self.get_relationships(direction='forward'):
if rel_as_subject.state != State.ACTIVE:
continue
# ... parent is the object
parent_pkg = rel_as_subject.object
# Now look for the parent's other relationships as object ...
for parent_rel_as_object in parent_pkg.get_relationships(direction='reverse'):
if parent_rel_as_object.state != State.ACTIVE:
continue
# and check children
child_pkg = parent_rel_as_object.subject
if (child_pkg != self and
parent_rel_as_object.type == rel_as_subject.type and
child_pkg.state == State.ACTIVE):
type_printable = PackageRelationship.inferred_types_printable['sibling']
rel_list.append((child_pkg, type_printable, None))
return sorted(list(set(rel_list)))
#
## Licenses are currently integrated into the domain model here.
@classmethod
def get_license_register(cls):
if not hasattr(cls, '_license_register'):
cls._license_register = LicenseRegister()
return cls._license_register
@classmethod
def get_license_options(cls):
register = cls.get_license_register()
return [(l.title, l.id) for l in register.values()]
def get_license(self):
if self.license_id:
try:
license = self.get_license_register()[self.license_id]
except KeyError:
license = None
else:
license = None
return license
def set_license(self, license):
if type(license) == License:
self.license_id = license.id
elif type(license) == dict:
self.license_id = license['id']
else:
msg = "Value not a license object or entity: %s" % repr(license)
raise Exception, msg
license = property(get_license, set_license)
@property
def all_related_revisions(self):
'''Returns chronological list of all object revisions related to
this package. Includes PackageRevisions, PackageTagRevisions,
PackageExtraRevisions and ResourceRevisions.
@return List of tuples (revision, [list of object revisions of this
revision])
Ordered by most recent first.
'''
from tag import PackageTag
from resource import ResourceGroup, Resource
from package_extra import PackageExtra
results = {} # revision:[PackageRevision1, PackageTagRevision1, etc.]
for pkg_rev in self.all_revisions:
if not results.has_key(pkg_rev.revision):
results[pkg_rev.revision] = []
results[pkg_rev.revision].append(pkg_rev)
for class_ in [ResourceGroup, Resource, PackageExtra, PackageTag]:
rev_class = class_.__revision_class__
if class_ == Resource:
q = Session.query(rev_class).join('continuity',
'resource_group')
obj_revisions = q.filter(ResourceGroup.package_id == self.id).all()
else:
obj_revisions = Session.query(rev_class).filter_by(package_id=self.id).all()
for obj_rev in obj_revisions:
if not results.has_key(obj_rev.revision):
results[obj_rev.revision] = []
results[obj_rev.revision].append(obj_rev)
result_list = results.items()
ourcmp = lambda rev_tuple1, rev_tuple2: \
cmp(rev_tuple2[0].timestamp, rev_tuple1[0].timestamp)
return sorted(result_list, cmp=ourcmp)
@property
def latest_related_revision(self):
'''Returns the latest revision for the package and its related
objects.'''
return self.all_related_revisions[0][0]
def diff(self, to_revision=None, from_revision=None):
'''Overrides the diff in vdm, so that related obj revisions are
diffed as well as PackageRevisions'''
from tag import PackageTag
from resource import ResourceGroup, Resource
from package_extra import PackageExtra
results = {} # field_name:diffs
results.update(super(Package, self).diff(to_revision, from_revision))
# Iterate over PackageTag, PackageExtra, Resources etc.
for obj_class in [ResourceGroup, Resource, PackageExtra, PackageTag]:
obj_rev_class = obj_class.__revision_class__
# Query for object revisions related to this package
if obj_class == Resource:
obj_rev_query = Session.query(obj_rev_class).\
join('continuity', 'resource_group').\
join('revision').\
filter(ResourceGroup.package_id == self.id).\
order_by(Revision.timestamp.desc())
else:
obj_rev_query = Session.query(obj_rev_class).\
filter_by(package_id=self.id).\
join('revision').\
order_by(Revision.timestamp.desc())
# Columns to include in the diff
cols_to_diff = obj_class.revisioned_fields()
cols_to_diff.remove('id')
if obj_class is Resource:
cols_to_diff.remove('resource_group_id')
else:
cols_to_diff.remove('package_id')
# Particular object types are better known by an invariant field
if obj_class is PackageTag:
cols_to_diff.remove('tag_id')
elif obj_class is PackageExtra:
cols_to_diff.remove('key')
# Iterate over each object ID
# e.g. for PackageTag, iterate over Tag objects
related_obj_ids = set([related_obj.id for related_obj in obj_rev_query.all()])
for related_obj_id in related_obj_ids:
q = obj_rev_query.filter(obj_rev_class.id==related_obj_id)
to_obj_rev, from_obj_rev = super(Package, self).\
get_obj_revisions_to_diff(
q, to_revision, from_revision)
for col in cols_to_diff:
values = [getattr(obj_rev, col) if obj_rev else '' for obj_rev in (from_obj_rev, to_obj_rev)]
value_diff = self._differ(*values)
if value_diff:
if obj_class.__name__ == 'PackageTag':
display_id = to_obj_rev.tag.name
elif obj_class.__name__ == 'PackageExtra':
display_id = to_obj_rev.key
else:
display_id = related_obj_id[:4]
key = '%s-%s-%s' % (obj_class.__name__, display_id, col)
results[key] = value_diff
return results
@property
def metadata_modified(self):
"""
Return most recent timestamp for revisions related to this package.
NB Excludes changes to the package's groups
"""
import ckan.model as model
where = [model.package_table.c.id == self.id]
where_clauses = [
and_(model.package_table.c.revision_id == model.revision_table.c.id, *where),
and_(model.package_extra_table.c.package_id == model.package_table.c.id,
model.package_extra_table.c.revision_id == model.revision_table.c.id, *where),
and_(model.package_relationship_table.c.subject_package_id == model.package_table.c.id,
model.package_relationship_table.c.revision_id == model.revision_table.c.id, *where),
and_(model.package_relationship_table.c.object_package_id == model.package_table.c.id,
model.package_relationship_table.c.revision_id == model.revision_table.c.id, *where),
and_(model.resource_group_table.c.package_id == model.package_table.c.id,
model.resource_group_table.c.revision_id == model.revision_table.c.id, *where),
and_(model.resource_group_table.c.package_id == model.package_table.c.id,
model.resource_table.c.resource_group_id == model.resource_group_table.c.id,
model.resource_table.c.revision_id == model.revision_table.c.id, *where),
and_(model.package_tag_table.c.package_id == model.package_table.c.id,
model.package_tag_table.c.revision_id == model.revision_table.c.id, *where)
]
query = union(*[select([model.revision_table.c.timestamp], x) for x in where_clauses]
).order_by('timestamp DESC').limit(1)
# Use current connection because we might be in a 'before_commit' of
# a SessionExtension - only by using the current connection can we get
# at the newly created revision etc. objects.
conn = model.Session.connection()
result = conn.execute(query).fetchone()
if result:
result_datetime = iso_date_to_datetime_for_sqlite(result[0])
timestamp_without_usecs = result_datetime.utctimetuple()
usecs = float(result_datetime.microsecond) / 1e6
# use timegm instead of mktime, because we don't want it localised
timestamp_float = timegm(timestamp_without_usecs) + usecs
return datetime.datetime.utcfromtimestamp(timestamp_float)
def get_groups(self):
import ckan.model as model
if '_groups' not in self.__dict__:
self._groups = model.Session.query(model.Group).\
join(model.Member, model.Member.group_id == model.Group.id).\
join(model.Package, model.Package.id == model.Member.table_id).\
filter(model.Member.state == 'active').\
filter(model.Package.id == self.id).all()
return self._groups
@property
def metadata_created(self):
import ckan.model as model
q = model.Session.query(model.PackageRevision)\
.filter(model.PackageRevision.id == self.id)\
.order_by(model.PackageRevision.revision_timestamp.asc())\
.limit(1)
ts = q.first()
if ts is not None:
return ts.revision_timestamp
@staticmethod
def get_fields(core_only=False, fields_to_ignore=None):
'''Returns a list of the properties of a package.
@param core_only - limit it to fields actually in the package table and
not those on related objects, such as tags & extras.
@param fields_to_ignore - a list of names of fields to not return if
present.
'''
# ['id', 'name', 'title', 'version', 'url', 'author', 'author_email', 'maintainer', 'maintainer_email', 'notes', 'license_id', 'state']
fields = Package.revisioned_fields()
if not core_only:
fields += ['resources', 'tags', 'groups', 'extras', 'relationships']
if fields_to_ignore:
for field in fields_to_ignore:
fields.remove(field)
return fields