Adding database migration of file management.

migrations/versions/cb645597b71b_.py

@@ -0,0 +1,46 @@
+"""empty message
+
+Revision ID: cb645597b71b
+Revises: 53596ce86e7e
+Create Date: 2019-12-27 13:50:31.336513
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'cb645597b71b'
+down_revision = '53596ce86e7e'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_table('file',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('name', sa.String(), nullable=True),
+    sa.Column('version', sa.Integer(), nullable=True),
+    sa.Column('last_updated', sa.DateTime(timezone=True), nullable=True),
+    sa.Column('type', sa.Enum('bpmn', 'svg', 'dmn', name='filetype'), nullable=True),
+    sa.Column('primary', sa.Boolean(), nullable=True),
+    sa.Column('content_type', sa.String(), nullable=True),
+    sa.Column('workflow_spec_id', sa.Integer(), nullable=True),
+    sa.ForeignKeyConstraint(['workflow_spec_id'], ['workflow_spec.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    op.create_table('file_data',
+    sa.Column('id', sa.Integer(), nullable=False),
+    sa.Column('data', sa.LargeBinary(), nullable=True),
+    sa.ForeignKeyConstraint(['id'], ['file.id'], ),
+    sa.PrimaryKeyConstraint('id')
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_table('file_data')
+    op.drop_table('file')
+    # ### end Alembic commands ###