Migrate existing data and switch to using Release.is_prerelease

warehouse/migrations/versions/4490777c984f_migrate_existing_data_for_release_is_.py

@@ -0,0 +1,52 @@
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+"""
+Migrate Existing Data for Release.is_prerelease
+
+Revision ID: 4490777c984f
+Revises: b0dbcd2f5c77
+Create Date: 2022-06-27 17:49:09.835384
+"""
+
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "4490777c984f"
+down_revision = "b0dbcd2f5c77"
+
+
+def upgrade():
+    op.execute(
+        """
+        UPDATE releases
+        SET is_prerelease = pep440_is_prerelease(version)
+        WHERE is_prelease IS NULL
+        """
+    )
+    op.alter_column(
+        "releases",
+        "is_prerelease",
+        existing_type=sa.BOOLEAN(),
+        server_default=sa.text("false"),
+        nullable=False,
+    )
+
+
+def downgrade():
+    op.alter_column(
+        "releases",
+        "is_prerelease",
+        existing_type=sa.BOOLEAN(),
+        server_default=None,
+        nullable=True,
+    )

warehouse/packaging/models.py

@@ -418,7 +418,7 @@ def __table_args__(cls):  # noqa
     )
     version = Column(Text, nullable=False)
     canonical_version = Column(Text, nullable=False)
-    is_prerelease = orm.column_property(func.pep440_is_prerelease(version))
+    is_prerelease = Column(Boolean, nullable=False, server_default=sql.false())
     author = Column(Text)
     author_email = Column(Text)
     maintainer = Column(Text)