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