Update schema and alembic so we only have unique metric names (#185)

* Update schema and alembic so we only have unique metric names

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

* Add constraint name

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

src/insight/alembic/versions/512d9168f6c2_add_metric_name_unique_constraint.py

@@ -0,0 +1,30 @@
+"""add_metric_name_unique_constraint
+
+Revision ID: 512d9168f6c2
+Revises: eaf7bb3598af
+Create Date: 2024-03-27 14:18:55.504729
+
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "512d9168f6c2"
+down_revision = "eaf7bb3598af"
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_unique_constraint(
+        constraint_name="name-unique", table_name="metric", columns=["name"]
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade() -> None:
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(constraint_name="name-unique", table_name="metric", type_="unique")
+    # ### end Alembic commands ###

src/insight/database/schema.py

@@ -20,7 +20,7 @@ class Metric(Base):
     __tablename__ = "metric"
 
     id = mapped_column(INTEGER, primary_key=True)
-    name = mapped_column(VARCHAR(100), nullable=False)
+    name = mapped_column(VARCHAR(100), nullable=False, unique=True)
     category = mapped_column(VARCHAR(100))
     created_at = mapped_column(TIMESTAMP, default=func.now())