Blog media type initial migration.

* mediagoblin/media_types/blog/migrations/562bc42a8fff_blog_media_type_initial_migration.py:
  New file.

mediagoblin/media_types/blog/migrations/562bc42a8fff_blog_media_type_initial_migration.py

@@ -0,0 +1,59 @@
+"""Blog media type initial migration
+
+Revision ID: 562bc42a8fff
+Revises: 52bf0ccbedc1
+Create Date: 2016-03-12 23:17:45.477894
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '562bc42a8fff'
+down_revision = '52bf0ccbedc1'
+branch_labels = ('blog_media_type',)
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    if op.get_bind().engine.has_table("blogpost__mediadata"):
+        # Skip; this has already been instantiated
+        # (probably via sqlalchemy-migrate)
+        return
+
+    op.create_table(
+        'mediatype__blogs',
+        sa.Column('id', sa.Integer(), nullable=False),
+        sa.Column('title', sa.Unicode(), nullable=True),
+        sa.Column('description', sa.UnicodeText(), nullable=True),
+        sa.Column('author', sa.Integer(), nullable=False),
+        sa.Column('created', sa.DateTime(), nullable=False),
+        sa.Column('slug', sa.Unicode(), nullable=True),
+        sa.ForeignKeyConstraint(['author'], ['core__users.id']),
+        sa.PrimaryKeyConstraint('id'))
+
+    op.create_index(
+        op.f('ix_mediatype__blogs_author'),
+        'mediatype__blogs', ['author'], unique=False)
+
+    op.create_index(
+        op.f('ix_mediatype__blogs_created'),
+        'mediatype__blogs', ['created'], unique=False)
+
+    op.create_table(
+        'blogpost__mediadata',
+        sa.Column('media_entry', sa.Integer(), nullable=False),
+        sa.Column('blog', sa.Integer(), nullable=False),
+        sa.ForeignKeyConstraint(['blog'], ['mediatype__blogs.id']),
+        sa.ForeignKeyConstraint(['media_entry'], ['core__media_entries.id']),
+        sa.PrimaryKeyConstraint('media_entry'))
+
+
+def downgrade():
+    op.drop_table('blogpost__mediadata')
+    op.drop_index(op.f('ix_mediatype__blogs_created'),
+                  table_name='mediatype__blogs')
+    op.drop_index(op.f('ix_mediatype__blogs_author'),
+                  table_name='mediatype__blogs')
+    op.drop_table('mediatype__blogs')