mediagoblin/db/models.py

   1 # GNU MediaGoblin -- federated, autonomous media hosting
   2 # Copyright (C) 2011, 2012 MediaGoblin contributors.  See AUTHORS.
   3 #
   4 # This program is free software: you can redistribute it and/or modify
   5 # it under the terms of the GNU Affero General Public License as published by
   6 # the Free Software Foundation, either version 3 of the License, or
   7 # (at your option) any later version.
   8 #
   9 # This program is distributed in the hope that it will be useful,
  10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12 # GNU Affero General Public License for more details.
  13 #
  14 # You should have received a copy of the GNU Affero General Public License
  15 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
  16
  17 """
  18 TODO: indexes on foreignkeys, where useful.
  19 """
  20
  21 import logging
  22 import datetime
  23
  24 from sqlalchemy import Column, Integer, Unicode, UnicodeText, DateTime, \
  25         Boolean, ForeignKey, UniqueConstraint, PrimaryKeyConstraint, \
  26         SmallInteger
  27 from sqlalchemy.orm import relationship, backref, with_polymorphic
  28 from sqlalchemy.orm.collections import attribute_mapped_collection
  29 from sqlalchemy.sql.expression import desc
  30 from sqlalchemy.ext.associationproxy import association_proxy
  31 from sqlalchemy.util import memoized_property
  32
  33
  34 from mediagoblin.db.extratypes import PathTupleWithSlashes, JSONEncoded
  35 from mediagoblin.db.base import Base, DictReadAttrProxy
  36 from mediagoblin.db.mixin import UserMixin, MediaEntryMixin, \
  37         MediaCommentMixin, CollectionMixin, CollectionItemMixin
  38 from mediagoblin.tools.files import delete_media_files
  39 from mediagoblin.tools.common import import_component
  40
  41 # It's actually kind of annoying how sqlalchemy-migrate does this, if
  42 # I understand it right, but whatever.  Anyway, don't remove this :P
  43 #
  44 # We could do migration calls more manually instead of relying on
  45 # this import-based meddling...
  46 from migrate import changeset
  47
  48 _log = logging.getLogger(__name__)
  49
  50
  51 class User(Base, UserMixin):
  52     """
  53     TODO: We should consider moving some rarely used fields
  54     into some sort of "shadow" table.
  55     """
  56     __tablename__ = "core__users"
  57
  58     id = Column(Integer, primary_key=True)
  59     username = Column(Unicode, nullable=False, unique=True)
  60     # Note: no db uniqueness constraint on email because it's not
  61     # reliable (many email systems case insensitive despite against
  62     # the RFC) and because it would be a mess to implement at this
  63     # point.
  64     email = Column(Unicode, nullable=False)
  65     pw_hash = Column(Unicode)
  66     email_verified = Column(Boolean, default=False)
  67     created = Column(DateTime, nullable=False, default=datetime.datetime.now)
  68     status = Column(Unicode, default=u"needs_email_verification", nullable=False)
  69     # Intented to be nullable=False, but migrations would not work for it
  70     # set to nullable=True implicitly.
  71     wants_comment_notification = Column(Boolean, default=True)
  72     license_preference = Column(Unicode)
  73     is_admin = Column(Boolean, default=False, nullable=False)
  74     url = Column(Unicode)
  75     bio = Column(UnicodeText)  # ??
  76
  77     ## TODO
  78     # plugin data would be in a separate model
  79
  80     def __repr__(self):
  81         return '<{0} #{1} {2} {3} "{4}">'.format(
  82                 self.__class__.__name__,
  83                 self.id,
  84                 'verified' if self.email_verified else 'non-verified',
  85                 'admin' if self.is_admin else 'user',
  86                 self.username)
  87
  88     def delete(self, **kwargs):
  89         """Deletes a User and all related entries/comments/files/..."""
  90         # Collections get deleted by relationships.
  91
  92         media_entries = MediaEntry.query.filter(MediaEntry.uploader == self.id)
  93         for media in media_entries:
  94             # TODO: Make sure that "MediaEntry.delete()" also deletes
  95             # all related files/Comments
  96             media.delete(del_orphan_tags=False, commit=False)
  97
  98         # Delete now unused tags
  99         # TODO: import here due to cyclic imports!!! This cries for refactoring
 100         from mediagoblin.db.util import clean_orphan_tags
 101         clean_orphan_tags(commit=False)
 102
 103         # Delete user, pass through commit=False/True in kwargs
 104         super(User, self).delete(**kwargs)
 105         _log.info('Deleted user "{0}" account'.format(self.username))
 106
 107
 108 class Client(Base):
 109     """
 110         Model representing a client - Used for API Auth
 111     """
 112     __tablename__ = "core__clients"
 113
 114     id = Column(Unicode, nullable=True, primary_key=True)
 115     secret = Column(Unicode, nullable=False)
 116     expirey = Column(DateTime, nullable=True)
 117     application_type = Column(Unicode, nullable=False)
 118     created = Column(DateTime, nullable=False, default=datetime.datetime.now)
 119     updated = Column(DateTime, nullable=False, default=datetime.datetime.now)
 120
 121     # optional stuff
 122     redirect_uri = Column(JSONEncoded, nullable=True)
 123     logo_url = Column(Unicode, nullable=True)
 124     application_name = Column(Unicode, nullable=True)
 125     contacts = Column(JSONEncoded, nullable=True)
 126
 127     def __repr__(self):
 128         if self.application_name:
 129             return "<Client {0} - {1}>".format(self.application_name, self.id)
 130         else:
 131             return "<Client {0}>".format(self.id)
 132
 133 class RequestToken(Base):
 134     """
 135         Model for representing the request tokens
 136     """
 137     __tablename__ = "core__request_tokens"
 138
 139     token = Column(Unicode, primary_key=True)
 140     secret = Column(Unicode, nullable=False)
 141     client = Column(Unicode, ForeignKey(Client.id))
 142     user = Column(Integer, ForeignKey(User.id), nullable=True)
 143     used = Column(Boolean, default=False)
 144     authenticated = Column(Boolean, default=False)
 145     verifier = Column(Unicode, nullable=True)
 146     callback = Column(Unicode, nullable=False, default=u"oob")
 147     created = Column(DateTime, nullable=False, default=datetime.datetime.now)
 148     updated = Column(DateTime, nullable=False, default=datetime.datetime.now)
 149
 150 class AccessToken(Base):
 151     """
 152         Model for representing the access tokens
 153     """
 154     __tablename__ = "core__access_tokens"
 155
 156     token = Column(Unicode, nullable=False, primary_key=True)
 157     secret = Column(Unicode, nullable=False)
 158     user = Column(Integer, ForeignKey(User.id))
 159     request_token = Column(Unicode, ForeignKey(RequestToken.token))
 160     created = Column(DateTime, nullable=False, default=datetime.datetime.now)
 161     updated = Column(DateTime, nullable=False, default=datetime.datetime.now)
 162
 163
 164 class NonceTimestamp(Base):
 165     """
 166         A place the timestamp and nonce can be stored - this is for OAuth1
 167     """
 168     __tablename__ = "core__nonce_timestamps"
 169
 170     nonce = Column(Unicode, nullable=False, primary_key=True)
 171     timestamp = Column(DateTime, nullable=False, primary_key=True)
 172
 173
 174 class MediaEntry(Base, MediaEntryMixin):
 175     """
 176     TODO: Consider fetching the media_files using join
 177     """
 178     __tablename__ = "core__media_entries"
 179
 180     id = Column(Integer, primary_key=True)
 181     uploader = Column(Integer, ForeignKey(User.id), nullable=False, index=True)
 182     title = Column(Unicode, nullable=False)
 183     slug = Column(Unicode)
 184     created = Column(DateTime, nullable=False, default=datetime.datetime.now,
 185         index=True)
 186     description = Column(UnicodeText) # ??
 187     media_type = Column(Unicode, nullable=False)
 188     state = Column(Unicode, default=u'unprocessed', nullable=False)
 189         # or use sqlalchemy.types.Enum?
 190     license = Column(Unicode)
 191     collected = Column(Integer, default=0)
 192
 193     fail_error = Column(Unicode)
 194     fail_metadata = Column(JSONEncoded)
 195
 196     transcoding_progress = Column(SmallInteger)
 197
 198     queued_media_file = Column(PathTupleWithSlashes)
 199
 200     queued_task_id = Column(Unicode)
 201
 202     __table_args__ = (
 203         UniqueConstraint('uploader', 'slug'),
 204         {})
 205
 206     get_uploader = relationship(User)
 207
 208     media_files_helper = relationship("MediaFile",
 209         collection_class=attribute_mapped_collection("name"),
 210         cascade="all, delete-orphan"
 211         )
 212     media_files = association_proxy('media_files_helper', 'file_path',
 213         creator=lambda k, v: MediaFile(name=k, file_path=v)
 214         )
 215
 216     attachment_files_helper = relationship("MediaAttachmentFile",
 217         cascade="all, delete-orphan",
 218         order_by="MediaAttachmentFile.created"
 219         )
 220     attachment_files = association_proxy("attachment_files_helper", "dict_view",
 221         creator=lambda v: MediaAttachmentFile(
 222             name=v["name"], filepath=v["filepath"])
 223         )
 224
 225     tags_helper = relationship("MediaTag",
 226         cascade="all, delete-orphan" # should be automatically deleted
 227         )
 228     tags = association_proxy("tags_helper", "dict_view",
 229         creator=lambda v: MediaTag(name=v["name"], slug=v["slug"])
 230         )
 231
 232     collections_helper = relationship("CollectionItem",
 233         cascade="all, delete-orphan"
 234         )
 235     collections = association_proxy("collections_helper", "in_collection")
 236
 237     ## TODO
 238     # fail_error
 239
 240     def get_comments(self, ascending=False):
 241         order_col = MediaComment.created
 242         if not ascending:
 243             order_col = desc(order_col)
 244         return self.all_comments.order_by(order_col)
 245
 246     def url_to_prev(self, urlgen):
 247         """get the next 'newer' entry by this user"""
 248         media = MediaEntry.query.filter(
 249             (MediaEntry.uploader == self.uploader)
 250             & (MediaEntry.state == u'processed')
 251             & (MediaEntry.id > self.id)).order_by(MediaEntry.id).first()
 252
 253         if media is not None:
 254             return media.url_for_self(urlgen)
 255
 256     def url_to_next(self, urlgen):
 257         """get the next 'older' entry by this user"""
 258         media = MediaEntry.query.filter(
 259             (MediaEntry.uploader == self.uploader)
 260             & (MediaEntry.state == u'processed')
 261             & (MediaEntry.id < self.id)).order_by(desc(MediaEntry.id)).first()
 262
 263         if media is not None:
 264             return media.url_for_self(urlgen)
 265
 266     @property
 267     def media_data(self):
 268         return getattr(self, self.media_data_ref)
 269
 270     def media_data_init(self, **kwargs):
 271         """
 272         Initialize or update the contents of a media entry's media_data row
 273         """
 274         media_data = self.media_data
 275
 276         if media_data is None:
 277             # Get the correct table:
 278             table = import_component(self.media_type + '.models:DATA_MODEL')
 279             # No media data, so actually add a new one
 280             media_data = table(**kwargs)
 281             # Get the relationship set up.
 282             media_data.get_media_entry = self
 283         else:
 284             # Update old media data
 285             for field, value in kwargs.iteritems():
 286                 setattr(media_data, field, value)
 287
 288     @memoized_property
 289     def media_data_ref(self):
 290         return import_component(self.media_type + '.models:BACKREF_NAME')
 291
 292     def __repr__(self):
 293         safe_title = self.title.encode('ascii', 'replace')
 294
 295         return '<{classname} {id}: {title}>'.format(
 296                 classname=self.__class__.__name__,
 297                 id=self.id,
 298                 title=safe_title)
 299
 300     def delete(self, del_orphan_tags=True, **kwargs):
 301         """Delete MediaEntry and all related files/attachments/comments
 302
 303         This will *not* automatically delete unused collections, which
 304         can remain empty...
 305
 306         :param del_orphan_tags: True/false if we delete unused Tags too
 307         :param commit: True/False if this should end the db transaction"""
 308         # User's CollectionItems are automatically deleted via "cascade".
 309         # Comments on this Media are deleted by cascade, hopefully.
 310
 311         # Delete all related files/attachments
 312         try:
 313             delete_media_files(self)
 314         except OSError, error:
 315             # Returns list of files we failed to delete
 316             _log.error('No such files from the user "{1}" to delete: '
 317                        '{0}'.format(str(error), self.get_uploader))
 318         _log.info('Deleted Media entry id "{0}"'.format(self.id))
 319         # Related MediaTag's are automatically cleaned, but we might
 320         # want to clean out unused Tag's too.
 321         if del_orphan_tags:
 322             # TODO: Import here due to cyclic imports!!!
 323             #       This cries for refactoring
 324             from mediagoblin.db.util import clean_orphan_tags
 325             clean_orphan_tags(commit=False)
 326         # pass through commit=False/True in kwargs
 327         super(MediaEntry, self).delete(**kwargs)
 328
 329
 330 class FileKeynames(Base):
 331     """
 332     keywords for various places.
 333     currently the MediaFile keys
 334     """
 335     __tablename__ = "core__file_keynames"
 336     id = Column(Integer, primary_key=True)
 337     name = Column(Unicode, unique=True)
 338
 339     def __repr__(self):
 340         return "<FileKeyname %r: %r>" % (self.id, self.name)
 341
 342     @classmethod
 343     def find_or_new(cls, name):
 344         t = cls.query.filter_by(name=name).first()
 345         if t is not None:
 346             return t
 347         return cls(name=name)
 348
 349
 350 class MediaFile(Base):
 351     """
 352     TODO: Highly consider moving "name" into a new table.
 353     TODO: Consider preloading said table in software
 354     """
 355     __tablename__ = "core__mediafiles"
 356
 357     media_entry = Column(
 358         Integer, ForeignKey(MediaEntry.id),
 359         nullable=False)
 360     name_id = Column(SmallInteger, ForeignKey(FileKeynames.id), nullable=False)
 361     file_path = Column(PathTupleWithSlashes)
 362
 363     __table_args__ = (
 364         PrimaryKeyConstraint('media_entry', 'name_id'),
 365         {})
 366
 367     def __repr__(self):
 368         return "<MediaFile %s: %r>" % (self.name, self.file_path)
 369
 370     name_helper = relationship(FileKeynames, lazy="joined", innerjoin=True)
 371     name = association_proxy('name_helper', 'name',
 372         creator=FileKeynames.find_or_new
 373         )
 374
 375
 376 class MediaAttachmentFile(Base):
 377     __tablename__ = "core__attachment_files"
 378
 379     id = Column(Integer, primary_key=True)
 380     media_entry = Column(
 381         Integer, ForeignKey(MediaEntry.id),
 382         nullable=False)
 383     name = Column(Unicode, nullable=False)
 384     filepath = Column(PathTupleWithSlashes)
 385     created = Column(DateTime, nullable=False, default=datetime.datetime.now)
 386
 387     @property
 388     def dict_view(self):
 389         """A dict like view on this object"""
 390         return DictReadAttrProxy(self)
 391
 392
 393 class Tag(Base):
 394     __tablename__ = "core__tags"
 395
 396     id = Column(Integer, primary_key=True)
 397     slug = Column(Unicode, nullable=False, unique=True)
 398
 399     def __repr__(self):
 400         return "<Tag %r: %r>" % (self.id, self.slug)
 401
 402     @classmethod
 403     def find_or_new(cls, slug):
 404         t = cls.query.filter_by(slug=slug).first()
 405         if t is not None:
 406             return t
 407         return cls(slug=slug)
 408
 409
 410 class MediaTag(Base):
 411     __tablename__ = "core__media_tags"
 412
 413     id = Column(Integer, primary_key=True)
 414     media_entry = Column(
 415         Integer, ForeignKey(MediaEntry.id),
 416         nullable=False, index=True)
 417     tag = Column(Integer, ForeignKey(Tag.id), nullable=False, index=True)
 418     name = Column(Unicode)
 419     # created = Column(DateTime, nullable=False, default=datetime.datetime.now)
 420
 421     __table_args__ = (
 422         UniqueConstraint('tag', 'media_entry'),
 423         {})
 424
 425     tag_helper = relationship(Tag)
 426     slug = association_proxy('tag_helper', 'slug',
 427         creator=Tag.find_or_new
 428         )
 429
 430     def __init__(self, name=None, slug=None):
 431         Base.__init__(self)
 432         if name is not None:
 433             self.name = name
 434         if slug is not None:
 435             self.tag_helper = Tag.find_or_new(slug)
 436
 437     @property
 438     def dict_view(self):
 439         """A dict like view on this object"""
 440         return DictReadAttrProxy(self)
 441
 442
 443 class MediaComment(Base, MediaCommentMixin):
 444     __tablename__ = "core__media_comments"
 445
 446     id = Column(Integer, primary_key=True)
 447     media_entry = Column(
 448         Integer, ForeignKey(MediaEntry.id), nullable=False, index=True)
 449     author = Column(Integer, ForeignKey(User.id), nullable=False)
 450     created = Column(DateTime, nullable=False, default=datetime.datetime.now)
 451     content = Column(UnicodeText, nullable=False)
 452
 453     # Cascade: Comments are owned by their creator. So do the full thing.
 454     # lazy=dynamic: People might post a *lot* of comments,
 455     #     so make the "posted_comments" a query-like thing.
 456     get_author = relationship(User,
 457                               backref=backref("posted_comments",
 458                                               lazy="dynamic",
 459                                               cascade="all, delete-orphan"))
 460     get_entry = relationship(MediaEntry,
 461                              backref=backref("comments",
 462                                              lazy="dynamic",
 463                                              cascade="all, delete-orphan"))
 464
 465     # Cascade: Comments are somewhat owned by their MediaEntry.
 466     #     So do the full thing.
 467     # lazy=dynamic: MediaEntries might have many comments,
 468     #     so make the "all_comments" a query-like thing.
 469     get_media_entry = relationship(MediaEntry,
 470                                    backref=backref("all_comments",
 471                                                    lazy="dynamic",
 472                                                    cascade="all, delete-orphan"))
 473
 474
 475 class Collection(Base, CollectionMixin):
 476     """An 'album' or 'set' of media by a user.
 477
 478     On deletion, contained CollectionItems get automatically reaped via
 479     SQL cascade"""
 480     __tablename__ = "core__collections"
 481
 482     id = Column(Integer, primary_key=True)
 483     title = Column(Unicode, nullable=False)
 484     slug = Column(Unicode)
 485     created = Column(DateTime, nullable=False, default=datetime.datetime.now,
 486                      index=True)
 487     description = Column(UnicodeText)
 488     creator = Column(Integer, ForeignKey(User.id), nullable=False)
 489     # TODO: No of items in Collection. Badly named, can we migrate to num_items?
 490     items = Column(Integer, default=0)
 491
 492     # Cascade: Collections are owned by their creator. So do the full thing.
 493     get_creator = relationship(User,
 494                                backref=backref("collections",
 495                                                cascade="all, delete-orphan"))
 496
 497     __table_args__ = (
 498         UniqueConstraint('creator', 'slug'),
 499         {})
 500
 501     def get_collection_items(self, ascending=False):
 502         #TODO, is this still needed with self.collection_items being available?
 503         order_col = CollectionItem.position
 504         if not ascending:
 505             order_col = desc(order_col)
 506         return CollectionItem.query.filter_by(
 507             collection=self.id).order_by(order_col)
 508
 509
 510 class CollectionItem(Base, CollectionItemMixin):
 511     __tablename__ = "core__collection_items"
 512
 513     id = Column(Integer, primary_key=True)
 514     media_entry = Column(
 515         Integer, ForeignKey(MediaEntry.id), nullable=False, index=True)
 516     collection = Column(Integer, ForeignKey(Collection.id), nullable=False)
 517     note = Column(UnicodeText, nullable=True)
 518     added = Column(DateTime, nullable=False, default=datetime.datetime.now)
 519     position = Column(Integer)
 520
 521     # Cascade: CollectionItems are owned by their Collection. So do the full thing.
 522     in_collection = relationship(Collection,
 523                                  backref=backref(
 524                                      "collection_items",
 525                                      cascade="all, delete-orphan"))
 526
 527     get_media_entry = relationship(MediaEntry)
 528
 529     __table_args__ = (
 530         UniqueConstraint('collection', 'media_entry'),
 531         {})
 532
 533     @property
 534     def dict_view(self):
 535         """A dict like view on this object"""
 536         return DictReadAttrProxy(self)
 537
 538
 539 class ProcessingMetaData(Base):
 540     __tablename__ = 'core__processing_metadata'
 541
 542     id = Column(Integer, primary_key=True)
 543     media_entry_id = Column(Integer, ForeignKey(MediaEntry.id), nullable=False,
 544             index=True)
 545     media_entry = relationship(MediaEntry,
 546             backref=backref('processing_metadata',
 547                 cascade='all, delete-orphan'))
 548     callback_url = Column(Unicode)
 549
 550     @property
 551     def dict_view(self):
 552         """A dict like view on this object"""
 553         return DictReadAttrProxy(self)
 554
 555
 556 class CommentSubscription(Base):
 557     __tablename__ = 'core__comment_subscriptions'
 558     id = Column(Integer, primary_key=True)
 559
 560     created = Column(DateTime, nullable=False, default=datetime.datetime.now)
 561
 562     media_entry_id = Column(Integer, ForeignKey(MediaEntry.id), nullable=False)
 563     media_entry = relationship(MediaEntry,
 564                         backref=backref('comment_subscriptions',
 565                                         cascade='all, delete-orphan'))
 566
 567     user_id = Column(Integer, ForeignKey(User.id), nullable=False)
 568     user = relationship(User,
 569                         backref=backref('comment_subscriptions',
 570                                         cascade='all, delete-orphan'))
 571
 572     notify = Column(Boolean, nullable=False, default=True)
 573     send_email = Column(Boolean, nullable=False, default=True)
 574
 575     def __repr__(self):
 576         return ('<{classname} #{id}: {user} {media} notify: '
 577                 '{notify} email: {email}>').format(
 578             id=self.id,
 579             classname=self.__class__.__name__,
 580             user=self.user,
 581             media=self.media_entry,
 582             notify=self.notify,
 583             email=self.send_email)
 584
 585
 586 class Notification(Base):
 587     __tablename__ = 'core__notifications'
 588     id = Column(Integer, primary_key=True)
 589     type = Column(Unicode)
 590
 591     created = Column(DateTime, nullable=False, default=datetime.datetime.now)
 592
 593     user_id = Column(Integer, ForeignKey('core__users.id'), nullable=False,
 594                      index=True)
 595     seen = Column(Boolean, default=lambda: False, index=True)
 596     user = relationship(
 597         User,
 598         backref=backref('notifications', cascade='all, delete-orphan'))
 599
 600     __mapper_args__ = {
 601         'polymorphic_identity': 'notification',
 602         'polymorphic_on': type
 603     }
 604
 605     def __repr__(self):
 606         return '<{klass} #{id}: {user}: {subject} ({seen})>'.format(
 607             id=self.id,
 608             klass=self.__class__.__name__,
 609             user=self.user,
 610             subject=getattr(self, 'subject', None),
 611             seen='unseen' if not self.seen else 'seen')
 612
 613
 614 class CommentNotification(Notification):
 615     __tablename__ = 'core__comment_notifications'
 616     id = Column(Integer, ForeignKey(Notification.id), primary_key=True)
 617
 618     subject_id = Column(Integer, ForeignKey(MediaComment.id))
 619     subject = relationship(
 620         MediaComment,
 621         backref=backref('comment_notifications', cascade='all, delete-orphan'))
 622
 623     __mapper_args__ = {
 624         'polymorphic_identity': 'comment_notification'
 625     }
 626
 627
 628 class ProcessingNotification(Notification):
 629     __tablename__ = 'core__processing_notifications'
 630
 631     id = Column(Integer, ForeignKey(Notification.id), primary_key=True)
 632
 633     subject_id = Column(Integer, ForeignKey(MediaEntry.id))
 634     subject = relationship(
 635         MediaEntry,
 636         backref=backref('processing_notifications',
 637                         cascade='all, delete-orphan'))
 638
 639     __mapper_args__ = {
 640         'polymorphic_identity': 'processing_notification'
 641     }
 642
 643
 644 with_polymorphic(
 645     Notification,
 646     [ProcessingNotification, CommentNotification])
 647
 648 MODELS = [
 649     User, Client, RequestToken, AccessToken, NonceTimestamp, MediaEntry, Tag,
 650     MediaTag, MediaComment, Collection, CollectionItem, MediaFile, FileKeynames,
 651     MediaAttachmentFile, ProcessingMetaData, Notification, CommentNotification,
 652     ProcessingNotification, CommentSubscription]
 653
 654 """
 655  Foundations are the default rows that are created immediately after the tables
 656  are initialized. Each entry to  this dictionary should be in the format of:
 657                  ModelConstructorObject:List of Dictionaries
 658  (Each Dictionary represents a row on the Table to be created, containing each
 659   of the columns' names as a key string, and each of the columns' values as a
 660   value)
 661
 662  ex. [NOTE THIS IS NOT BASED OFF OF OUR USER TABLE]
 663     user_foundations = [{'name':u'Joanna', 'age':24},
 664                         {'name':u'Andrea', 'age':41}]
 665
 666     FOUNDATIONS = {User:user_foundations}
 667 """
 668 FOUNDATIONS = {}
 669
 670 ######################################################
 671 # Special, migrations-tracking table
 672 #
 673 # Not listed in MODELS because this is special and not
 674 # really migrated, but used for migrations (for now)
 675 ######################################################
 676
 677 class MigrationData(Base):
 678     __tablename__ = "core__migrations"
 679
 680     name = Column(Unicode, primary_key=True)
 681     version = Column(Integer, nullable=False, default=0)
 682
 683 ######################################################
 684
 685
 686 def show_table_init(engine_uri):
 687     if engine_uri is None:
 688         engine_uri = 'sqlite:///:memory:'
 689     from sqlalchemy import create_engine
 690     engine = create_engine(engine_uri, echo=True)
 691
 692     Base.metadata.create_all(engine)
 693
 694
 695 if __name__ == '__main__':
 696     from sys import argv
 697     print repr(argv)
 698     if len(argv) == 2:
 699         uri = argv[1]
 700     else:
 701         uri = None
 702     show_table_init(uri)