[FIX] Bug in title_abstraction indexation

alembic/versions/159a5154362b_fix_bug_in_title_abstract_indexation.py

+"""Fix bug in title_abstract indexation
+
+Revision ID: 159a5154362b
+Revises: 73112a361617
+Create Date: 2017-09-18 18:00:26.055335
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from gargantext.util.alembic import ReplaceableObject
+
+
+# revision identifiers, used by Alembic.
+revision = '159a5154362b'
+down_revision = '73112a361617'
+branch_labels = None
+depends_on = None
+
+
+title_abstract_insert = ReplaceableObject(
+    'title_abstract_insert',
+    'BEFORE INSERT',
+    'nodes',
+    """FOR EACH ROW
+       WHEN (NEW.hyperdata::text <> '{}'::text)
+       EXECUTE PROCEDURE title_abstract_update_trigger()"""
+)
+
+
+title_abstract_update = ReplaceableObject(
+    'title_abstract_update',
+    'BEFORE UPDATE OF hyperdata',
+    'nodes',
+    """FOR EACH ROW
+       WHEN ((OLD.hyperdata ->> 'title', OLD.hyperdata ->> 'abstract')
+             IS DISTINCT FROM
+             (NEW.hyperdata ->> 'title', NEW.hyperdata ->> 'abstract'))
+       EXECUTE PROCEDURE title_abstract_update_trigger()"""
+)
+
+
+def upgrade():
+    op.replace_trigger(title_abstract_insert, replaces="73112a361617.title_abstract_insert")
+    op.replace_trigger(title_abstract_update, replaces="73112a361617.title_abstract_update")
+
+    # Manually re-build index
+    op.execute("UPDATE nodes SET title_abstract = to_tsvector('english', (hyperdata ->> 'title') || ' ' || (hyperdata ->> 'abstract')) WHERE typename=4")
+
+
+def downgrade():
+    # Won't unfix the bug !
+    pass