Plugin baselines skip tables that already exist

plugins/printedparts/migrations/versions/0001_printedparts_baseline.py

@@ -11,6 +11,11 @@ ops are written out explicitly anyway to match the measuringtools exemplar
 and keep the baseline reviewable.
 """
 from alembic import op
+
+from shopdb.plugins.alembic_template import (
+    create_index_if_missing,
+    create_table_if_missing,
+)
 import sqlalchemy as sa
 
 
@@ -22,7 +27,7 @@ depends_on = None
 
 
 def upgrade():
-    op.create_table(
+    create_table_if_missing(
         'printeditems',
         sa.Column('printeditemid', sa.Integer(), nullable=False),
         sa.Column('itemcode', sa.String(length=20), nullable=True),
@@ -39,9 +44,9 @@ def upgrade():
         sa.PrimaryKeyConstraint('printeditemid'),
         sa.UniqueConstraint('itemcode'),
     )
-    op.create_index('ix_printeditems_itemcode', 'printeditems', ['itemcode'])
+    create_index_if_missing('ix_printeditems_itemcode', 'printeditems', ['itemcode'])
 
-    op.create_table(
+    create_table_if_missing(
         'printeditemtransactions',
         sa.Column('transactionid', sa.Integer(), nullable=False),
         sa.Column('printeditemid', sa.Integer(), nullable=False),
@@ -58,12 +63,12 @@ def upgrade():
                                 ondelete='CASCADE'),
         sa.PrimaryKeyConstraint('transactionid'),
     )
-    op.create_index('ix_printeditemtransactions_printeditemid',
-                    'printeditemtransactions', ['printeditemid'])
-    op.create_index('ix_printeditemtransactions_employeesso',
-                    'printeditemtransactions', ['employeesso'])
-    op.create_index('ix_printeditemtransactions_transactiondate',
-                    'printeditemtransactions', ['transactiondate'])
+    create_index_if_missing('ix_printeditemtransactions_printeditemid',
+                            'printeditemtransactions', ['printeditemid'])
+    create_index_if_missing('ix_printeditemtransactions_employeesso',
+                            'printeditemtransactions', ['employeesso'])
+    create_index_if_missing('ix_printeditemtransactions_transactiondate',
+                            'printeditemtransactions', ['transactiondate'])
 
 
 def downgrade():

plugins/printedparts/migrations/versions/0002_printeditemfiles.py

@@ -5,6 +5,11 @@ the ADR-008 payoff: the plugin evolves its own schema without touching
 the core chain. Applied by `flask plugin upgrade-all`.
 """
 from alembic import op
+
+from shopdb.plugins.alembic_template import (
+    create_index_if_missing,
+    create_table_if_missing,
+)
 import sqlalchemy as sa
 
 
@@ -16,7 +21,7 @@ depends_on = None
 
 
 def upgrade():
-    op.create_table(
+    create_table_if_missing(
         'printeditemfiles',
         sa.Column('fileid', sa.Integer(), nullable=False),
         sa.Column('printeditemid', sa.Integer(), nullable=False),
@@ -35,8 +40,8 @@ def upgrade():
         sa.PrimaryKeyConstraint('fileid'),
         sa.UniqueConstraint('storedfilename'),
     )
-    op.create_index('ix_printeditemfiles_printeditemid',
-                    'printeditemfiles', ['printeditemid'])
+    create_index_if_missing('ix_printeditemfiles_printeditemid',
+                            'printeditemfiles', ['printeditemid'])
 
 
 def downgrade():