[DB Changes! Read PR!] Merge pull request #201 from nyaadevs/update-alembic-migrations

Rewrite database models for declarative and update Alembic migrations

db_create.py

@@ -1,15 +1,9 @@
+#!/usr/bin/env python3
 import sys
+import sqlalchemy
 from nyaa import app, db, models
 
-# Create tables
+NYAA_CATEGORIES = [
-
-db.create_all()
-
-# Insert categories and insert if it doesn't eixst
-existing_cats = models.MainCategory.query.all()
-if not existing_cats:
-    if app.config['SITE_FLAVOR'] == 'nyaa':
-        CATEGORIES = [
     ('Anime', ['Anime Music Video', 'English-translated', 'Non-English-translated', 'Raw']),
     ('Audio', ['Lossless', 'Lossy']),
     ('Literature', ['English-translated', 'Non-English-translated', 'Raw']),
@@ -17,19 +11,50 @@ if not existing_cats:
     ('Pictures', ['Graphics', 'Photos']),
     ('Software', ['Applications', 'Games']),
 ]
-    elif app.config['SITE_FLAVOR'] == 'sukebei':
+
-        CATEGORIES = [
+
+SUKEBEI_CATEGORIES = [
     ('Art', ['Anime', 'Doujinshi', 'Games', 'Manga', 'Pictures']),
     ('Real Life', ['Photobooks / Pictures', 'Videos']),
 ]
-    else:
-        CATEGORIES = []
 
-    for main_cat_name, sub_cat_names in CATEGORIES:
+
-        main_cat = models.MainCategory(name=main_cat_name)
+def add_categories(categories, main_class, sub_class):
+    for main_cat_name, sub_cat_names in categories:
+        main_cat = main_class(name=main_cat_name)
         for i, sub_cat_name in enumerate(sub_cat_names):
             # Composite keys can't autoincrement, set sub_cat id manually (1-index)
-            sub_cat = models.SubCategory(id=i+1, name=sub_cat_name, main_category=main_cat)
+            sub_cat = sub_class(id=i+1, name=sub_cat_name, main_category=main_cat)
         db.session.add(main_cat)
 
+
+if __name__ == '__main__':
+    # Test for the user table, assume db is empty if it's not created
+    database_empty = False
+    try:
+        models.User.query.first()
+    except (sqlalchemy.exc.ProgrammingError, sqlalchemy.exc.OperationalError):
+        database_empty = True
+
+
+    print('Creating all tables...')
+    db.create_all()
+
+
+    nyaa_category_test = models.NyaaMainCategory.query.first()
+    if not nyaa_category_test:
+        print('Adding Nyaa categories...')
+        add_categories(NYAA_CATEGORIES, models.NyaaMainCategory, models.NyaaSubCategory)
+
+    sukebei_category_test = models.SukebeiMainCategory.query.first()
+    if not sukebei_category_test:
+        print('Adding Sukebei categories...')
+        add_categories(SUKEBEI_CATEGORIES, models.SukebeiMainCategory, models.SukebeiSubCategory)
+
     db.session.commit()
+
+    if database_empty:
+        print('Remember to run the following to mark the database up-to-date for Alembic:')
+        print('./db_migrate.py db stamp head')
+        # Technically we should be able to do this here, but when you have
+        # Flask-Migrate and Flask-SQA and everything... I didn't get it working.

db_migrate.py

@@ -1,4 +1,4 @@
-#!/usr/bin/python3
+#!/usr/bin/env python3
 # -*- coding: utf-8 -*-
 from nyaa import app, db
 from flask_script import Manager

migrations/versions/3001f79b7722_add_torrents.uploader_ip.py

@@ -11,20 +11,19 @@ import sqlalchemy as sa
 
 # revision identifiers, used by Alembic.
 revision = '3001f79b7722'
-down_revision = None
+down_revision = '97ddefed1834'
 branch_labels = None
 depends_on = None
 
+TABLE_PREFIXES = ('nyaa', 'sukebei')
+
 
 def upgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
+    for prefix in TABLE_PREFIXES:
-    op.add_column('nyaa_torrents', sa.Column('uploader_ip', sa.Binary(), nullable=True))
+        op.add_column(prefix + '_torrents', sa.Column('uploader_ip', sa.Binary(), nullable=True))
-    op.add_column('sukebei_torrents', sa.Column('uploader_ip', sa.Binary(), nullable=True))
         # ### end Alembic commands ###
 
 
 def downgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
+    for prefix in TABLE_PREFIXES:
-    op.drop_column('nyaa_torrents', 'uploader_ip')
+        op.drop_column(prefix + '_torrents', 'uploader_ip')
-    op.drop_column('sukebei_torrents', 'uploader_ip')
-    # ### end Alembic commands ###

migrations/versions/97ddefed1834_initial_database_state.py

@@ -0,0 +1,166 @@
+"""Initial database state
+
+Revision ID: 97ddefed1834
+Revises: 
+Create Date: 2017-05-26 18:46:14.440040
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import sqlalchemy_utils
+from sqlalchemy.dialects import mysql
+
+# revision identifiers, used by Alembic.
+revision = '97ddefed1834'
+down_revision = None
+branch_labels = None
+depends_on = None
+
+TABLE_PREFIXES = ('nyaa', 'sukebei')
+
+def upgrade():
+    # Shared tables
+    op.create_table('users',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('username', sa.String(length=32, collation='ascii_general_ci'), nullable=False),
+        sa.Column('email', sqlalchemy_utils.types.email.EmailType(length=255), nullable=True),
+        
+        # These are actually PasswordType, UserStatusType and UserLevelType,
+        # but database-wise binary and integers are what's being used
+        sa.Column('password_hash', sa.Binary(length=255), nullable=False),
+        sa.Column('status', sa.Integer(), nullable=False),
+        sa.Column('level', sa.Integer(), nullable=False),
+
+        sa.Column('created_time', sa.DateTime(), nullable=True),
+        sa.Column('last_login_date', sa.DateTime(), nullable=True),
+        sa.Column('last_login_ip', sa.Binary(), nullable=True),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint('email'),
+        sa.UniqueConstraint('username')
+    )
+
+    op.create_table('trackers',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('uri', sa.String(length=255, collation='utf8_general_ci'), nullable=False),
+        sa.Column('disabled', sa.Boolean(), nullable=False),
+        sa.PrimaryKeyConstraint('id'),
+        sa.UniqueConstraint('uri')
+    )
+
+    # Nyaa and Sukebei
+    for prefix in TABLE_PREFIXES:
+        # Main categories
+        op.create_table(prefix + '_main_categories',
+            sa.Column('id', sa.Integer(), nullable=False),
+            sa.Column('name', sa.String(length=64), nullable=False),
+            sa.PrimaryKeyConstraint('id')
+        )
+        # Sub categories
+        op.create_table(prefix + '_sub_categories',
+            sa.Column('id', sa.Integer(), nullable=False),
+            sa.Column('main_category_id', sa.Integer(), nullable=False),
+            sa.Column('name', sa.String(length=64), nullable=False),
+            sa.ForeignKeyConstraint(['main_category_id'], [prefix + '_main_categories.id'], ),
+            sa.PrimaryKeyConstraint('id', 'main_category_id')
+        )
+        # Main torrent table
+        op.create_table(prefix + '_torrents',
+            sa.Column('id', sa.Integer(), nullable=False),
+            sa.Column('info_hash', sa.BINARY(length=20), nullable=False),
+            sa.Column('display_name', sa.String(length=255, collation='utf8_general_ci'), nullable=False),
+            sa.Column('torrent_name', sa.String(length=255), nullable=False),
+            sa.Column('information', sa.String(length=255), nullable=False),
+            sa.Column('description', mysql.TEXT(collation='utf8mb4_bin'), nullable=False),
+            sa.Column('filesize', sa.BIGINT(), nullable=False),
+            sa.Column('encoding', sa.String(length=32), nullable=False),
+            sa.Column('flags', sa.Integer(), nullable=False),
+            sa.Column('uploader_id', sa.Integer(), nullable=True),
+            sa.Column('has_torrent', sa.Boolean(), nullable=False),
+            sa.Column('created_time', sa.DateTime(), nullable=False),
+            sa.Column('updated_time', sa.DateTime(), nullable=False),
+            sa.Column('main_category_id', sa.Integer(), nullable=False),
+            sa.Column('sub_category_id', sa.Integer(), nullable=False),
+            sa.Column('redirect', sa.Integer(), nullable=True),
+            sa.ForeignKeyConstraint(['main_category_id', 'sub_category_id'], [prefix + '_sub_categories.main_category_id', prefix + '_sub_categories.id'], ),
+            sa.ForeignKeyConstraint(['main_category_id'], [prefix + '_main_categories.id'], ),
+            sa.ForeignKeyConstraint(['redirect'], [prefix + '_torrents.id'], ),
+            sa.ForeignKeyConstraint(['uploader_id'], ['users.id'], ),
+            sa.PrimaryKeyConstraint('id')
+        )
+        op.create_index(op.f('ix_' + prefix + '_torrents_display_name'), prefix + '_torrents', ['display_name'], unique=False)
+        op.create_index(op.f('ix_' + prefix + '_torrents_filesize'), prefix + '_torrents', ['filesize'], unique=False)
+        op.create_index(op.f('ix_' + prefix + '_torrents_flags'), prefix + '_torrents', ['flags'], unique=False)
+        op.create_index(op.f('ix_' + prefix + '_torrents_info_hash'), prefix + '_torrents', ['info_hash'], unique=True)
+        op.create_index(prefix + '_uploader_flag_idx', prefix + '_torrents', ['uploader_id', 'flags'], unique=False)
+        
+        # Statistics for torrents
+        op.create_table(prefix + '_statistics',
+            sa.Column('torrent_id', sa.Integer(), nullable=False),
+            sa.Column('seed_count', sa.Integer(), nullable=False),
+            sa.Column('leech_count', sa.Integer(), nullable=False),
+            sa.Column('download_count', sa.Integer(), nullable=False),
+            sa.Column('last_updated', sa.DateTime(), nullable=True),
+            sa.ForeignKeyConstraint(['torrent_id'], [prefix + '_torrents.id'], ondelete='CASCADE'),
+            sa.PrimaryKeyConstraint('torrent_id')
+        )
+        op.create_index(op.f('ix_' + prefix + '_statistics_download_count'), prefix + '_statistics', ['download_count'], unique=False)
+        op.create_index(op.f('ix_' + prefix + '_statistics_leech_count'), prefix + '_statistics', ['leech_count'], unique=False)
+        op.create_index(op.f('ix_' + prefix + '_statistics_seed_count'), prefix + '_statistics', ['seed_count'], unique=False)
+        
+        # Trackers relationships for torrents
+        op.create_table(prefix + '_torrent_trackers',
+            sa.Column('torrent_id', sa.Integer(), nullable=False),
+            sa.Column('tracker_id', sa.Integer(), nullable=False),
+            sa.Column('order', sa.Integer(), nullable=False),
+            sa.ForeignKeyConstraint(['torrent_id'], [prefix + '_torrents.id'], ondelete='CASCADE'),
+            sa.ForeignKeyConstraint(['tracker_id'], ['trackers.id'], ondelete='CASCADE'),
+            sa.PrimaryKeyConstraint('torrent_id', 'tracker_id')
+        )
+        op.create_index(op.f('ix_' + prefix + '_torrent_trackers_order'), prefix + '_torrent_trackers', ['order'], unique=False)
+        
+        # Torrent filelists
+        op.create_table(prefix + '_torrents_filelist',
+            sa.Column('torrent_id', sa.Integer(), nullable=False),
+            sa.Column('filelist_blob', mysql.MEDIUMBLOB(), nullable=True),
+            sa.ForeignKeyConstraint(['torrent_id'], [prefix + '_torrents.id'], ondelete='CASCADE'),
+            sa.PrimaryKeyConstraint('torrent_id'),
+            mysql_row_format='COMPRESSED'
+        )
+        
+        # Torrent info_dicts
+        op.create_table(prefix + '_torrents_info',
+            sa.Column('torrent_id', sa.Integer(), nullable=False),
+            sa.Column('info_dict', mysql.MEDIUMBLOB(), nullable=True),
+            sa.ForeignKeyConstraint(['torrent_id'], [prefix + '_torrents.id'], ondelete='CASCADE'),
+            sa.PrimaryKeyConstraint('torrent_id'),
+            mysql_row_format='COMPRESSED'
+        )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # Note: this may fail. It's better to just drop all tables instead (or reset the database)
+    
+    # Nyaa and Sukebei
+    for prefix in TABLE_PREFIXES:
+        op.drop_table(prefix + '_torrents_info')
+        op.drop_table(prefix + '_torrents_filelist')
+        op.drop_index(op.f('ix_' + prefix + '_torrent_trackers_order'), table_name=prefix + '_torrent_trackers')
+        op.drop_table(prefix + '_torrent_trackers')
+        op.drop_index(op.f('ix_' + prefix + '_statistics_seed_count'), table_name=prefix + '_statistics')
+        op.drop_index(op.f('ix_' + prefix + '_statistics_leech_count'), table_name=prefix + '_statistics')
+        op.drop_index(op.f('ix_' + prefix + '_statistics_download_count'), table_name=prefix + '_statistics')
+        op.drop_table(prefix + '_statistics')
+        op.drop_table(prefix + '_torrents')
+        op.drop_index(prefix + '_uploader_flag_idx', table_name=prefix + '_torrents')
+        op.drop_index(op.f('ix_' + prefix + '_torrents_info_hash'), table_name=prefix + '_torrents')
+        op.drop_index(op.f('ix_' + prefix + '_torrents_flags'), table_name=prefix + '_torrents')
+        op.drop_index(op.f('ix_' + prefix + '_torrents_filesize'), table_name=prefix + '_torrents')
+        op.drop_index(op.f('ix_' + prefix + '_torrents_display_name'), table_name=prefix + '_torrents')
+        op.drop_table(prefix + '_sub_categories')
+        op.drop_table(prefix + '_main_categories')
+
+    # Shared tables
+    op.drop_table('users')
+    op.drop_table('trackers')
+    # ### end Alembic commands ###

migrations/versions/d0eeb8049623_add_comments.py

@@ -15,34 +15,23 @@ down_revision = '3001f79b7722'
 branch_labels = None
 depends_on = None
 
+TABLE_PREFIXES = ('nyaa', 'sukebei')
+
 
 def upgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
+    for prefix in TABLE_PREFIXES:
-    op.create_table('nyaa_comments',
+        op.create_table(prefix + '_comments',
             sa.Column('id', sa.Integer(), nullable=False),
             sa.Column('torrent_id', sa.Integer(), nullable=False),
             sa.Column('user_id', sa.Integer(), nullable=True),
             sa.Column('created_time', sa.DateTime(), nullable=True),
             sa.Column('text', sa.String(length=255, collation='utf8mb4_bin'), nullable=False),
-    sa.ForeignKeyConstraint(['torrent_id'], ['nyaa_torrents.id'], ondelete='CASCADE'),
+            sa.ForeignKeyConstraint(['torrent_id'], [prefix + '_torrents.id'], ondelete='CASCADE'),
             sa.ForeignKeyConstraint(['user_id'], ['users.id'], ondelete='CASCADE'),
             sa.PrimaryKeyConstraint('id')
         )
-    op.create_table('sukebei_comments',
-    sa.Column('id', sa.Integer(), nullable=False),
-    sa.Column('torrent_id', sa.Integer(), nullable=False),
-    sa.Column('user_id', sa.Integer(), nullable=True),
-    sa.Column('created_time', sa.DateTime(), nullable=True),
-    sa.Column('text', sa.String(length=255, collation='utf8mb4_bin'), nullable=False),
-    sa.ForeignKeyConstraint(['torrent_id'], ['sukebei_torrents.id'], ondelete='CASCADE'),
-    sa.ForeignKeyConstraint(['user_id'], ['users.id'], ondelete='CASCADE'),
-    sa.PrimaryKeyConstraint('id')
-    )
-    # ### end Alembic commands ###
 
 
 def downgrade():
-    # ### commands auto generated by Alembic - please adjust! ###
+    for prefix in TABLE_PREFIXES:
-    op.drop_table('nyaa_comments')
+        op.drop_table(prefix + '_comments')
-    op.drop_table('sukebei_comments')
-    # ### end Alembic commands ###

nyaa/models.py

@@ -3,10 +3,13 @@ from enum import Enum, IntEnum
 from datetime import datetime, timezone
 from nyaa import app, db
 from nyaa.torrents import create_magnet
+
 from sqlalchemy import func, ForeignKeyConstraint, Index
+from sqlalchemy.ext import declarative
 from sqlalchemy_utils import ChoiceType, EmailType, PasswordType
-from werkzeug.security import generate_password_hash, check_password_hash
 from sqlalchemy_fulltext import FullText
+
+from werkzeug.security import generate_password_hash, check_password_hash
 from ipaddress import ip_address
 
 import re
@@ -36,6 +39,31 @@ else:
 UTC_EPOCH = datetime.utcfromtimestamp(0)
 
 
+class DeclarativeHelperBase(object):
+    ''' This class eases our nyaa-sukebei shenanigans by automatically adjusting
+        __tablename__ and providing class methods for renaming references. '''
+    # See http://docs.sqlalchemy.org/en/latest/orm/extensions/declarative/api.html
+
+    __tablename_base__ = None
+    __flavor__ = None
+
+    @classmethod
+    def _table_prefix_string(cls):
+        return cls.__flavor__.lower() + '_'
+
+    @classmethod
+    def _table_prefix(cls, table_name):
+        return cls._table_prefix_string() + table_name
+
+    @classmethod
+    def _flavor_prefix(cls, table_name):
+        return cls.__flavor__ + table_name
+
+    @declarative.declared_attr
+    def __tablename__(cls):
+        return cls._table_prefix(cls.__tablename_base__)
+
+
 class TorrentFlags(IntEnum):
     NONE = 0
     ANONYMOUS = 1
@@ -46,16 +74,13 @@ class TorrentFlags(IntEnum):
     DELETED = 32
 
 
-DB_TABLE_PREFIX = app.config['TABLE_PREFIX']
+class TorrentBase(DeclarativeHelperBase):
-
+    __tablename_base__ = 'torrents'
-
-class Torrent(db.Model):
-    __tablename__ = DB_TABLE_PREFIX + 'torrents'
 
     id = db.Column(db.Integer, primary_key=True)
     info_hash = db.Column(BinaryType(length=20), unique=True, nullable=False, index=True)
-    display_name = db.Column(
+    display_name = db.Column(db.String(length=255, collation=COL_UTF8_GENERAL_CI),
-        db.String(length=255, collation=COL_UTF8_GENERAL_CI), nullable=False, index=True)
+                             nullable=False, index=True)
     torrent_name = db.Column(db.String(length=255), nullable=False)
     information = db.Column(db.String(length=255), nullable=False)
     description = db.Column(DescriptionTextType(collation=COL_UTF8MB4_BIN), nullable=False)
@@ -63,45 +88,84 @@ class Torrent(db.Model):
     filesize = db.Column(db.BIGINT, default=0, nullable=False, index=True)
     encoding = db.Column(db.String(length=32), nullable=False)
     flags = db.Column(db.Integer, default=0, nullable=False, index=True)
-    uploader_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=True)
+
+    @declarative.declared_attr
+    def uploader_id(cls):
+        # Even though this is same for both tables, declarative requires this
+        return db.Column(db.Integer, db.ForeignKey('users.id'), nullable=True)
+
     uploader_ip = db.Column(db.Binary(length=16), default=None, nullable=True)
     has_torrent = db.Column(db.Boolean, nullable=False, default=False)
 
     created_time = db.Column(db.DateTime(timezone=False), default=datetime.utcnow, nullable=False)
-    updated_time = db.Column(db.DateTime(timezone=False),
+    updated_time = db.Column(db.DateTime(timezone=False), default=datetime.utcnow,
-                             default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False)
+                             onupdate=datetime.utcnow, nullable=False)
+
+    @declarative.declared_attr
+    def main_category_id(cls):
+        fk = db.ForeignKey(cls._table_prefix('main_categories.id'))
+        return db.Column(db.Integer, fk, nullable=False)
 
-    main_category_id = db.Column(db.Integer, db.ForeignKey(
-        DB_TABLE_PREFIX + 'main_categories.id'), nullable=False)
     sub_category_id = db.Column(db.Integer, nullable=False)
-    redirect = db.Column(db.Integer, db.ForeignKey(
-        DB_TABLE_PREFIX + 'torrents.id'), nullable=True)
 
-    __table_args__ = (
+    @declarative.declared_attr
-        Index('uploader_flag_idx', 'uploader_id', 'flags'),
+    def redirect(cls):
+        fk = db.ForeignKey(cls._table_prefix('torrents.id'))
+        return db.Column(db.Integer, fk, nullable=True)
+
+    @declarative.declared_attr
+    def __table_args__(cls):
+        return (
+                Index(cls._table_prefix('uploader_flag_idx'), 'uploader_id', 'flags'),
                 ForeignKeyConstraint(
                     ['main_category_id', 'sub_category_id'],
-            [DB_TABLE_PREFIX + 'sub_categories.main_category_id',
+                    [cls._table_prefix('sub_categories.main_category_id'),
-                DB_TABLE_PREFIX + 'sub_categories.id']
+                        cls._table_prefix('sub_categories.id')]
                 ), {}
             )
 
-    user = db.relationship('User', uselist=False, back_populates='torrents')
+    @declarative.declared_attr
-    main_category = db.relationship('MainCategory', uselist=False,
+    def user(cls):
+        return db.relationship('User', uselist=False, back_populates=cls._table_prefix('torrents'))
+
+    @declarative.declared_attr
+    def main_category(cls):
+        return db.relationship(cls._flavor_prefix('MainCategory'), uselist=False,
                                back_populates='torrents', lazy="joined")
-    sub_category = db.relationship('SubCategory', uselist=False, backref='torrents', lazy="joined",
+
-                                   primaryjoin=(
+    @declarative.declared_attr
-                                       "and_(SubCategory.id == foreign(Torrent.sub_category_id), "
+    def sub_category(cls):
-                                       "SubCategory.main_category_id == Torrent.main_category_id)"))
+        join_sql = ("and_({0}SubCategory.id == foreign({0}Torrent.sub_category_id), "
-    info = db.relationship('TorrentInfo', uselist=False,
+                    "{0}SubCategory.main_category_id == {0}Torrent.main_category_id)")
+        return db.relationship(cls._flavor_prefix('SubCategory'), uselist=False,
+                               backref='torrents', lazy="joined",
+                               primaryjoin=join_sql.format(cls.__flavor__))
+
+    @declarative.declared_attr
+    def info(cls):
+        return db.relationship(cls._flavor_prefix('TorrentInfo'), uselist=False,
                                cascade="all, delete-orphan", back_populates='torrent')
-    filelist = db.relationship('TorrentFilelist', uselist=False,
+
+    @declarative.declared_attr
+    def filelist(cls):
+        return db.relationship(cls._flavor_prefix('TorrentFilelist'), uselist=False,
                                cascade="all, delete-orphan", back_populates='torrent')
-    stats = db.relationship('Statistic', uselist=False,
+
-                            cascade="all, delete-orphan", back_populates='torrent', lazy='joined')
+    @declarative.declared_attr
-    trackers = db.relationship('TorrentTrackers', uselist=True, cascade="all, delete-orphan",
+    def stats(cls):
-                               lazy='joined', order_by='TorrentTrackers.order')
+        return db.relationship(cls._flavor_prefix('Statistic'), uselist=False,
-    comments = db.relationship('Comment', uselist=True,
+                               cascade="all, delete-orphan", back_populates='torrent',
+                               lazy='joined')
+
+    @declarative.declared_attr
+    def trackers(cls):
+        return db.relationship(cls._flavor_prefix('TorrentTrackers'), uselist=True,
+                               cascade="all, delete-orphan", lazy='joined',
+                               order_by=cls._flavor_prefix('TorrentTrackers.order'))
+
+    @declarative.declared_attr
+    def comments(cls):
+        return db.relationship(cls._flavor_prefix('Comment'), uselist=True,
                                cascade="all, delete-orphan")
 
     def __repr__(self):
@@ -211,44 +275,57 @@ class Torrent(db.Model):
         return cls.by_info_hash(info_hash_bytes)
 
 
-class TorrentNameSearch(FullText, Torrent):
+class TorrentFilelistBase(DeclarativeHelperBase):
-    __fulltext_columns__ = ('display_name',)
+    __tablename_base__ = 'torrents_filelist'
 
-
-class TorrentFilelist(db.Model):
-    __tablename__ = DB_TABLE_PREFIX + 'torrents_filelist'
     __table_args__ = {'mysql_row_format': 'COMPRESSED'}
 
-    torrent_id = db.Column(db.Integer, db.ForeignKey(
+    @declarative.declared_attr
-        DB_TABLE_PREFIX + 'torrents.id', ondelete="CASCADE"), primary_key=True)
+    def torrent_id(cls):
+        fk = db.ForeignKey(cls._table_prefix('torrents.id'), ondelete="CASCADE")
+        return db.Column(db.Integer, fk, primary_key=True)
+
     filelist_blob = db.Column(MediumBlobType, nullable=True)
 
-    torrent = db.relationship('Torrent', uselist=False, back_populates='filelist')
+    @declarative.declared_attr
+    def torrent(cls):
+        return db.relationship(cls._flavor_prefix('Torrent'), uselist=False,
+                               back_populates='filelist')
 
 
-class TorrentInfo(db.Model):
+class TorrentInfoBase(DeclarativeHelperBase):
-    __tablename__ = DB_TABLE_PREFIX + 'torrents_info'
+    __tablename_base__ = 'torrents_info'
+
     __table_args__ = {'mysql_row_format': 'COMPRESSED'}
 
-    torrent_id = db.Column(db.Integer, db.ForeignKey(
+    @declarative.declared_attr
-        DB_TABLE_PREFIX + 'torrents.id', ondelete="CASCADE"), primary_key=True)
+    def torrent_id(cls):
+        return db.Column(db.Integer, db.ForeignKey(
+            cls._table_prefix('torrents.id'), ondelete="CASCADE"), primary_key=True)
     info_dict = db.Column(MediumBlobType, nullable=True)
 
-    torrent = db.relationship('Torrent', uselist=False, back_populates='info')
+    @declarative.declared_attr
+    def torrent(cls):
+        return db.relationship(cls._flavor_prefix('Torrent'), uselist=False, back_populates='info')
 
 
-class Statistic(db.Model):
+class StatisticBase(DeclarativeHelperBase):
-    __tablename__ = DB_TABLE_PREFIX + 'statistics'
+    __tablename_base__ = 'statistics'
 
-    torrent_id = db.Column(db.Integer, db.ForeignKey(
+    @declarative.declared_attr
-        DB_TABLE_PREFIX + 'torrents.id', ondelete="CASCADE"), primary_key=True)
+    def torrent_id(cls):
+        fk = db.ForeignKey(cls._table_prefix('torrents.id'), ondelete="CASCADE")
+        return db.Column(db.Integer, fk, primary_key=True)
 
     seed_count = db.Column(db.Integer, default=0, nullable=False, index=True)
     leech_count = db.Column(db.Integer, default=0, nullable=False, index=True)
     download_count = db.Column(db.Integer, default=0, nullable=False, index=True)
     last_updated = db.Column(db.DateTime(timezone=False))
 
-    torrent = db.relationship('Torrent', uselist=False, back_populates='stats')
+    @declarative.declared_attr
+    def torrent(cls):
+        return db.relationship(cls._flavor_prefix('Torrent'), uselist=False,
+                               back_populates='stats')
 
 
 class Trackers(db.Model):
@@ -264,30 +341,43 @@ class Trackers(db.Model):
         return cls.query.filter_by(uri=uri).first()
 
 
-class TorrentTrackers(db.Model):
+class TorrentTrackersBase(DeclarativeHelperBase):
-    __tablename__ = DB_TABLE_PREFIX + 'torrent_trackers'
+    __tablename_base__ = 'torrent_trackers'
+
+    @declarative.declared_attr
+    def torrent_id(cls):
+        fk = db.ForeignKey(cls._table_prefix('torrents.id'), ondelete="CASCADE")
+        return db.Column(db.Integer, fk, primary_key=True)
+
+    @declarative.declared_attr
+    def tracker_id(cls):
+        fk = db.ForeignKey('trackers.id', ondelete="CASCADE")
+        return db.Column(db.Integer, fk, primary_key=True)
 
-    torrent_id = db.Column(db.Integer, db.ForeignKey(
-        DB_TABLE_PREFIX + 'torrents.id', ondelete="CASCADE"), primary_key=True)
-    tracker_id = db.Column(db.Integer, db.ForeignKey(
-        'trackers.id', ondelete="CASCADE"), primary_key=True)
     order = db.Column(db.Integer, nullable=False, index=True)
 
-    tracker = db.relationship('Trackers', uselist=False, lazy='joined')
+    @declarative.declared_attr
+    def tracker(cls):
+        return db.relationship('Trackers', uselist=False, lazy='joined')
 
     @classmethod
     def by_torrent_id(cls, torrent_id):
         return cls.query.filter_by(torrent_id=torrent_id).order_by(cls.order.desc())
 
 
-class MainCategory(db.Model):
+class MainCategoryBase(DeclarativeHelperBase):
-    __tablename__ = DB_TABLE_PREFIX + 'main_categories'
+    __tablename_base__ = 'main_categories'
 
     id = db.Column(db.Integer, primary_key=True)
     name = db.Column(db.String(length=64), nullable=False)
 
-    sub_categories = db.relationship('SubCategory', back_populates='main_category')
+    @declarative.declared_attr
-    torrents = db.relationship('Torrent', back_populates='main_category')
+    def sub_categories(cls):
+        return db.relationship(cls._flavor_prefix('SubCategory'), back_populates='main_category')
+
+    @declarative.declared_attr
+    def torrents(cls):
+        return db.relationship(cls._flavor_prefix('Torrent'), back_populates='main_category')
 
     def get_category_ids(self):
         return (self.id, 0)
@@ -301,18 +391,22 @@ class MainCategory(db.Model):
         return cls.query.get(id)
 
 
-class SubCategory(db.Model):
+class SubCategoryBase(DeclarativeHelperBase):
-    __tablename__ = DB_TABLE_PREFIX + 'sub_categories'
+    __tablename_base__ = 'sub_categories'
 
     id = db.Column(db.Integer, primary_key=True)
-    main_category_id = db.Column(db.Integer, db.ForeignKey(
+
-        DB_TABLE_PREFIX + 'main_categories.id'), primary_key=True)
+    @declarative.declared_attr
+    def main_category_id(cls):
+        fk = db.ForeignKey(cls._table_prefix('main_categories.id'))
+        return db.Column(db.Integer, fk, primary_key=True)
+
     name = db.Column(db.String(length=64), nullable=False)
 
-    main_category = db.relationship('MainCategory', uselist=False, back_populates='sub_categories')
+    @declarative.declared_attr
-#    torrents = db.relationship('Torrent', back_populates='sub_category'),
+    def main_category(cls):
-#        primaryjoin="and_(Torrent.sub_category_id == foreign(SubCategory.id), "
+        return db.relationship(cls._flavor_prefix('MainCategory'), uselist=False,
-#                    "Torrent.main_category_id == SubCategory.main_category_id)")
+                               back_populates='sub_categories')
 
     def get_category_ids(self):
         return (self.main_category_id, self.id)
@@ -326,17 +420,27 @@ class SubCategory(db.Model):
         return cls.query.get((sub_cat_id, main_cat_id))
 
 
-class Comment(db.Model):
+class CommentBase(DeclarativeHelperBase):
-    __tablename__ = DB_TABLE_PREFIX + 'comments'
+    __tablename_base__ = 'comments'
 
     id = db.Column(db.Integer, primary_key=True)
-    torrent_id = db.Column(db.Integer, db.ForeignKey(
+
-        DB_TABLE_PREFIX + 'torrents.id', ondelete='CASCADE'), nullable=False)
+    @declarative.declared_attr
-    user_id = db.Column(db.Integer, db.ForeignKey('users.id', ondelete='CASCADE'))
+    def torrent_id(cls):
+        return db.Column(db.Integer, db.ForeignKey(
+                cls._table_prefix('torrents.id'), ondelete='CASCADE'), nullable=False)
+
+    @declarative.declared_attr
+    def user_id(cls):
+        return db.Column(db.Integer, db.ForeignKey('users.id', ondelete='CASCADE'))
+
     created_time = db.Column(db.DateTime(timezone=False), default=datetime.utcnow)
     text = db.Column(db.String(length=255, collation=COL_UTF8MB4_BIN), nullable=False)
 
-    user = db.relationship('User', uselist=False, back_populates='comments', lazy="joined")
+    @declarative.declared_attr
+    def user(cls):
+        return db.relationship('User', uselist=False,
+                               back_populates=cls._table_prefix('comments'), lazy="joined")
 
     def __repr__(self):
         return '<Comment %r>' % self.id
@@ -376,9 +480,11 @@ class User(db.Model):
     last_login_date = db.Column(db.DateTime(timezone=False), default=None, nullable=True)
     last_login_ip = db.Column(db.Binary(length=16), default=None, nullable=True)
 
-    torrents = db.relationship('Torrent', back_populates='user', lazy='dynamic')
+    nyaa_torrents = db.relationship('NyaaTorrent', back_populates='user', lazy='dynamic')
-    comments = db.relationship('Comment', back_populates='user', lazy='dynamic')
+    nyaa_comments = db.relationship('NyaaComment', back_populates='user', lazy='dynamic')
-    # session = db.relationship('Session', uselist=False, back_populates='user')
+
+    sukebei_torrents = db.relationship('SukebeiTorrent', back_populates='user', lazy='dynamic')
+    sukebei_comments = db.relationship('SukebeiComment', back_populates='user', lazy='dynamic')
 
     def __init__(self, username, email, password):
         self.username = username
@@ -464,12 +570,118 @@ class User(db.Model):
         return self.level >= UserLevelType.TRUSTED
 
 
-# class Session(db.Model):
+# Actually declare our site-specific classes
-#    __tablename__ = 'sessions'
+
-#
+# Torrent
-#    session_id = db.Column(db.Integer, primary_key=True)
+class NyaaTorrent(TorrentBase, db.Model):
-#    user_id = db.Column(db.Integer, db.ForeignKey('users.id'), nullable=False)
+    __flavor__ = 'Nyaa'
-#    login_ip = db.Column(db.Binary(length=16), nullable=True)
+
-#    login_date = db.Column(db.DateTime(timezone=False), nullable=True)
+
-#
+class SukebeiTorrent(TorrentBase, db.Model):
-#    user = db.relationship('User', back_populates='session')
+    __flavor__ = 'Sukebei'
+
+
+# Fulltext models for MySQL
+if app.config['USE_MYSQL']:
+    class NyaaTorrentNameSearch(FullText, NyaaTorrent):
+        __fulltext_columns__ = ('display_name',)
+        __table_args__ = {'extend_existing': True}
+
+    class SukebeiTorrentNameSearch(FullText, SukebeiTorrent):
+        __fulltext_columns__ = ('display_name',)
+        __table_args__ = {'extend_existing': True}
+else:
+    # Bogus classes for Sqlite
+    class NyaaTorrentNameSearch(object):
+        pass
+
+    class SukebeiTorrentNameSearch(object):
+        pass
+
+
+# TorrentFilelist
+class NyaaTorrentFilelist(TorrentFilelistBase, db.Model):
+    __flavor__ = 'Nyaa'
+
+
+class SukebeiTorrentFilelist(TorrentFilelistBase, db.Model):
+    __flavor__ = 'Sukebei'
+
+
+# TorrentInfo
+class NyaaTorrentInfo(TorrentInfoBase, db.Model):
+    __flavor__ = 'Nyaa'
+
+
+class SukebeiTorrentInfo(TorrentInfoBase, db.Model):
+    __flavor__ = 'Sukebei'
+
+
+# Statistic
+class NyaaStatistic(StatisticBase, db.Model):
+    __flavor__ = 'Nyaa'
+
+
+class SukebeiStatistic(StatisticBase, db.Model):
+    __flavor__ = 'Sukebei'
+
+
+# TorrentTrackers
+class NyaaTorrentTrackers(TorrentTrackersBase, db.Model):
+    __flavor__ = 'Nyaa'
+
+
+class SukebeiTorrentTrackers(TorrentTrackersBase, db.Model):
+    __flavor__ = 'Sukebei'
+
+
+# MainCategory
+class NyaaMainCategory(MainCategoryBase, db.Model):
+    __flavor__ = 'Nyaa'
+
+
+class SukebeiMainCategory(MainCategoryBase, db.Model):
+    __flavor__ = 'Sukebei'
+
+
+# SubCategory
+class NyaaSubCategory(SubCategoryBase, db.Model):
+    __flavor__ = 'Nyaa'
+
+
+class SukebeiSubCategory(SubCategoryBase, db.Model):
+    __flavor__ = 'Sukebei'
+
+
+# Comment
+class NyaaComment(CommentBase, db.Model):
+    __flavor__ = 'Nyaa'
+
+
+class SukebeiComment(CommentBase, db.Model):
+    __flavor__ = 'Sukebei'
+
+
+# Choose our defaults for models.Torrent etc
+if app.config['SITE_FLAVOR'] == 'nyaa':
+    Torrent = NyaaTorrent
+    TorrentFilelist = NyaaTorrentFilelist
+    TorrentInfo = NyaaTorrentInfo
+    Statistic = NyaaStatistic
+    TorrentTrackers = NyaaTorrentTrackers
+    MainCategory = NyaaMainCategory
+    SubCategory = NyaaSubCategory
+    Comment = NyaaComment
+
+    TorrentNameSearch = NyaaTorrentNameSearch
+elif app.config['SITE_FLAVOR'] == 'sukebei':
+    Torrent = SukebeiTorrent
+    TorrentFilelist = SukebeiTorrentFilelist
+    TorrentInfo = SukebeiTorrentInfo
+    Statistic = SukebeiStatistic
+    TorrentTrackers = SukebeiTorrentTrackers
+    MainCategory = SukebeiMainCategory
+    SubCategory = SukebeiSubCategory
+    Comment = SukebeiComment
+
+    TorrentNameSearch = SukebeiTorrentNameSearch