feat(user): support login with any case of username & email

migrations/versions/af88493881eb_user_change_collation_for_username_and_.py

@@ -0,0 +1,54 @@
+"""user: change collation for username and email
+
+Revision ID: af88493881eb
+Revises: 34a563187e47
+Create Date: 2025-08-26 11:31:07.183273
+
+"""
+
+from __future__ import annotations
+
+from collections.abc import Sequence
+
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision: str = "af88493881eb"
+down_revision: str | Sequence[str] | None = "34a563187e47"
+branch_labels: str | Sequence[str] | None = None
+depends_on: str | Sequence[str] | None = None
+
+
+def upgrade() -> None:
+    """Upgrade schema."""
+    # 1. 删除现有索引
+    op.drop_index("ix_lazer_users_email", table_name="lazer_users")
+    op.drop_index("ix_lazer_users_username", table_name="lazer_users")
+
+    # 2. 修改字段 collation 为 utf8mb4_general_ci
+    op.execute("""
+        ALTER TABLE lazer_users
+        MODIFY username VARCHAR(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL,
+        MODIFY email VARCHAR(254) CHARACTER SET utf8mb4 COLLATE utf8mb4_general_ci NOT NULL;
+    """)
+
+    # 3. 重新创建唯一索引（大小写不敏感）
+    op.create_index(op.f("ix_lazer_users_email"), "lazer_users", ["email"], unique=True)
+    op.create_index(op.f("ix_lazer_users_username"), "lazer_users", ["username"], unique=True)
+
+
+def downgrade() -> None:
+    # 1. 删除索引
+    op.drop_index("ix_lazer_users_email", table_name="lazer_users")
+    op.drop_index("ix_lazer_users_username", table_name="lazer_users")
+
+    # 2. 恢复原 collation（假设原来是 utf8mb4_bin）
+    op.execute("""
+        ALTER TABLE lazer_users
+        MODIFY username VARCHAR(32) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
+        MODIFY email VARCHAR(254) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL;
+    """)
+
+    # 3. 恢复原索引
+    op.create_index(op.f("ix_lazer_users_email"), "lazer_users", ["email"], unique=True)
+    op.create_index(op.f("ix_lazer_users_username"), "lazer_users", ["username"], unique=True)