[DB] User current_user_id() as default nodes.user_id

alembic/versions/291289b47bad_use_current_user_id_as_default_node_.py

+"""Use current_user_id() as default nodes.user_id
+
+Revision ID: 291289b47bad
+Revises: 4db5dcbe4bc7
+Create Date: 2017-10-09 14:58:12.992106
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import gargantext
+
+
+# revision identifiers, used by Alembic.
+revision = '291289b47bad'
+down_revision = '4db5dcbe4bc7'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.alter_column('nodes', 'user_id',
+               existing_type=sa.INTEGER(),
+               server_default=sa.text('current_user_id()'),
+               existing_nullable=False)
+
+
+def downgrade():
+    op.alter_column('nodes', 'user_id',
+               existing_type=sa.INTEGER(),
+               server_default=None,
+               existing_nullable=False)