Ascii media type initial migration.

* mediagoblin/db/migrations/versions/72bd70f7eefd_ascii_media_type_initial_migration.py:
  New file.

mediagoblin/media_types/ascii/migrations/72bd70f7eefd_ascii_media_type_initial_migration.py

@@ -0,0 +1,33 @@
+"""Ascii media type initial migration
+
+Revision ID: 72bd70f7eefd
+Revises: 52bf0ccbedc1
+Create Date: 2016-03-12 22:50:58.382980
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '72bd70f7eefd'
+down_revision = '52bf0ccbedc1'
+branch_labels = ('ascii_media_type',)
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade():
+    if op.get_bind().engine.has_table("ascii__mediadata"):
+        # Skip; this has already been instantiated
+        # (probably via sqlalchemy-migrate)
+        return
+
+    op.create_table(
+        'ascii__mediadata',
+        sa.Column('media_entry', sa.Integer(), nullable=False),
+        sa.ForeignKeyConstraint(['media_entry'], ['core__media_entries.id'], ),
+        sa.PrimaryKeyConstraint('media_entry'))
+
+
+def downgrade():
+    op.drop_table('ascii__mediadata')