fix: 修复 postgresql 下关系名过长的问题 (#160)

`postgresql` 中关系名不能超过 63 字节，所以删除 `init_db` 中创建约束的命令

fixed #159

Author: he0119

CHANGELOG.md

@@ -7,6 +7,10 @@ and this project adheres to [Semantic Versioning](https://semver.org/lang/zh-CN/
 
 ## [Unreleased]
 
+### Fixed
+
+- 修复 postgresql 下关系名过长的问题
+
 ## [0.4.2] - 2024-08-19
 
 ### Fixed

nonebot_plugin_user/migrations/9492159f98f7_remove_foreignkey.py

@@ -11,6 +11,8 @@
 from collections.abc import Sequence
 
 from alembic import op
+from nonebot import logger
+from sqlalchemy.exc import IdentifierError
 
 revision: str = "9492159f98f7"
 down_revision: str | Sequence[str] | None = "ac57f7074e58"
@@ -22,35 +24,28 @@ def upgrade(name: str = "") -> None:
     if name:
         return
     # ### commands auto generated by Alembic - please adjust! ###
-    with op.batch_alter_table("nonebot_plugin_user_bind", schema=None) as batch_op:
-        batch_op.drop_constraint(
-            "fk_nonebot_plugin_user_bind_original_id_nonebot_plugin_user_user",
-            type_="foreignkey",
-        )
-        batch_op.drop_constraint(
-            "fk_nonebot_plugin_user_bind_bind_id_nonebot_plugin_user_user",
-            type_="foreignkey",
-        )
 
+    # 尝试删除外键约束
+    # 老的数据库中还有约束，但是新的没有，所以这里可能会报错
+    try:
+        with op.batch_alter_table("nonebot_plugin_user_bind", schema=None) as batch_op:
+            batch_op.drop_constraint(
+                "fk_nonebot_plugin_user_bind_original_id_nonebot_plugin_user_user",
+                type_="foreignkey",
+            )
+            batch_op.drop_constraint(
+                "fk_nonebot_plugin_user_bind_bind_id_nonebot_plugin_user_user",
+                type_="foreignkey",
+            )
+        logger.info("[user] 已成功删除外键约束")
+    except (ValueError, IdentifierError):
+        logger.debug("[user] 未找到外键约束，跳过删除")
     # ### end Alembic commands ###
 
 
 def downgrade(name: str = "") -> None:
     if name:
         return
     # ### commands auto generated by Alembic - please adjust! ###
-    with op.batch_alter_table("nonebot_plugin_user_bind", schema=None) as batch_op:
-        batch_op.create_foreign_key(
-            "fk_nonebot_plugin_user_bind_bind_id_nonebot_plugin_user_user",
-            "nonebot_plugin_user_user",
-            ["bind_id"],
-            ["id"],
-        )
-        batch_op.create_foreign_key(
-            "fk_nonebot_plugin_user_bind_original_id_nonebot_plugin_user_user",
-            "nonebot_plugin_user_user",
-            ["original_id"],
-            ["id"],
-        )
 
     # ### end Alembic commands ###

nonebot_plugin_user/migrations/ac57f7074e58_init_db.py

@@ -37,18 +37,6 @@ def upgrade(name: str = "") -> None:
         sa.Column("platform_id", sa.String(length=64), nullable=False),
         sa.Column("bind_id", sa.Integer(), nullable=False),
         sa.Column("original_id", sa.Integer(), nullable=False),
-        sa.ForeignKeyConstraint(
-            ["bind_id"],
-            ["nonebot_plugin_user_user.id"],
-            name=op.f("fk_nonebot_plugin_user_bind_bind_id_nonebot_plugin_user_user"),
-        ),
-        sa.ForeignKeyConstraint(
-            ["original_id"],
-            ["nonebot_plugin_user_user.id"],
-            name=op.f(
-                "fk_nonebot_plugin_user_bind_original_id_nonebot_plugin_user_user"
-            ),
-        ),
         sa.PrimaryKeyConstraint(
             "platform", "platform_id", name=op.f("pk_nonebot_plugin_user_bind")
         ),