Adding ISOThread and UNC Thread

alembic/versions/627d4460a94f_add_iso_threads_table.py

@@ -0,0 +1,42 @@
+"""add iso_threads and unc_threads tables
+
+Revision ID: 627d4460a94f
+Revises: 0001_initial
+Create Date: 2026-06-24 21:50:05.340235
+"""
+
+from collections.abc import Sequence
+from typing import Union
+
+import sqlalchemy as sa
+
+from alembic import op
+
+revision: str = "627d4460a94f"
+down_revision: Union[str, None] = "0001_initial"
+branch_labels: Union[str, Sequence[str], None] = None
+depends_on: Union[str, Sequence[str], None] = None
+
+
+def upgrade() -> None:
+    op.create_table(
+        "iso_threads",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("diameter_mm", sa.Float(), nullable=False),
+        sa.Column("pitch_mm", sa.Float(), nullable=False),
+        sa.Column("depth_mm", sa.Float(), nullable=True),
+    )
+
+    op.create_table(
+        "unc_threads",
+        sa.Column("id", sa.Integer(), primary_key=True),
+        sa.Column("diameter_fraction", sa.String(length=16), nullable=False),
+        sa.Column("tpi", sa.Integer(), nullable=False),
+        sa.Column("series", sa.String(length=8), nullable=False),
+        sa.Column("depth_in", sa.Float(), nullable=True),
+    )
+
+
+def downgrade() -> None:
+    op.drop_table("unc_threads")
+    op.drop_table("iso_threads")