Embedding Models Table (#1006)

backend/alembic/versions/dbaa756c2ccf_embedding_models.py

@@ -0,0 +1,70 @@
+"""Embedding Models
+
+Revision ID: dbaa756c2ccf
+Revises: 7f726bad5367
+Create Date: 2024-01-25 17:12:31.813160
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+from danswer.db.models import IndexModelStatus
+
+# revision identifiers, used by Alembic.
+revision = "dbaa756c2ccf"
+down_revision = "7f726bad5367"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "embedding_model",
+        sa.Column("id", sa.Integer(), nullable=False),
+        sa.Column("model_name", sa.String(), nullable=False),
+        sa.Column("model_dim", sa.Integer(), nullable=False),
+        sa.Column("normalize", sa.Boolean(), nullable=False),
+        sa.Column("query_prefix", sa.String(), nullable=False),
+        sa.Column("passage_prefix", sa.String(), nullable=False),
+        sa.Column(
+            "status",
+            sa.Enum(IndexModelStatus, native=False),
+            nullable=False,
+        ),
+        sa.PrimaryKeyConstraint("id"),
+    )
+    op.add_column(
+        "index_attempt",
+        sa.Column("embedding_model_id", sa.Integer(), nullable=True),
+    )
+    op.create_foreign_key(
+        "index_attempt__embedding_model_fk",
+        "index_attempt",
+        "embedding_model",
+        ["embedding_model_id"],
+        ["id"],
+    )
+    op.create_index(
+        "ix_embedding_model_present_unique",
+        "embedding_model",
+        ["status"],
+        unique=True,
+        postgresql_where=sa.text("status = 'PRESENT'"),
+    )
+    op.create_index(
+        "ix_embedding_model_future_unique",
+        "embedding_model",
+        ["status"],
+        unique=True,
+        postgresql_where=sa.text("status = 'FUTURE'"),
+    )
+
+
+def downgrade() -> None:
+    op.drop_constraint(
+        "index_attempt__embedding_model_fk", "index_attempt", type_="foreignkey"
+    )
+    op.drop_column("index_attempt", "embedding_model_id")
+    op.drop_table("embedding_model")
+    op.drop_index("ix_embedding_model_present_unique", table_name="embedding_model")
+    op.drop_index("ix_embedding_model_future_unique", table_name="embedding_model")