[DB] Migration: add sensible defaults to nodes

alembic/versions/73304ae9f1fb_add_server_side_sensible_defaults_for_.py

+"""Add server side sensible defaults for nodes
+
+Revision ID: 73304ae9f1fb
+Revises: 159a5154362b
+Create Date: 2017-10-05 14:17:58.326646
+
+"""
+from alembic import op
+import sqlalchemy as sa
+import gargantext
+from sqlalchemy.dialects import postgresql
+
+# revision identifiers, used by Alembic.
+revision = '73304ae9f1fb'
+down_revision = '159a5154362b'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.alter_column('nodes', 'date',
+               existing_type=postgresql.TIMESTAMP(timezone=True),
+               server_default=sa.text('CURRENT_TIMESTAMP'),
+               nullable=False)
+    op.alter_column('nodes', 'hyperdata',
+               existing_type=postgresql.JSONB(astext_type=sa.Text()),
+               server_default=sa.text("'{}'::jsonb"),
+               nullable=False)
+    op.alter_column('nodes', 'name',
+               existing_type=sa.VARCHAR(length=255),
+               server_default='',
+               nullable=False)
+    op.alter_column('nodes', 'typename',
+               existing_type=sa.INTEGER(),
+               nullable=False)
+    op.alter_column('nodes', 'user_id',
+               existing_type=sa.INTEGER(),
+               nullable=False)
+
+
+def downgrade():
+    op.alter_column('nodes', 'user_id',
+               existing_type=sa.INTEGER(),
+               nullable=True)
+    op.alter_column('nodes', 'typename',
+               existing_type=sa.INTEGER(),
+               nullable=True)
+    op.alter_column('nodes', 'name',
+               existing_type=sa.VARCHAR(length=255),
+               server_default=None,
+               nullable=True)
+    op.alter_column('nodes', 'hyperdata',
+               existing_type=postgresql.JSONB(astext_type=sa.Text()),
+               server_default=None,
+               nullable=True)
+    op.alter_column('nodes', 'date',
+               existing_type=postgresql.TIMESTAMP(timezone=True),
+               server_default=None,
+               nullable=True)