Handle the common case of one chunk when calculating the uncompressed size

Reference #992

data/migrations/versions/403d02fea323_add_new_blobupload_columns.py

@@ -0,0 +1,28 @@
+"""Add new blobupload columns
+
+Revision ID: 403d02fea323
+Revises: 10b999e8db1f
+Create Date: 2015-11-30 14:25:46.822730
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '403d02fea323'
+down_revision = '10b999e8db1f'
+
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+
+def upgrade(tables):
+    ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('blobupload', sa.Column('chunk_count', sa.Integer(), nullable=False))
+    op.add_column('blobupload', sa.Column('uncompressed_byte_count', sa.Integer(), nullable=True))
+    ### end Alembic commands ###
+
+
+def downgrade(tables):
+    ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('blobupload', 'uncompressed_byte_count')
+    op.drop_column('blobupload', 'chunk_count')
+    ### end Alembic commands ###