重复的数据浏览器密钥阻止重建

[merefield (Robert)]

大家好，

我很少寻求帮助，但这次我对如何解决这个问题感到困惑。

我刚重建了我的网站，却遇到了以下错误：

discourse-data-explorer 已经是最新兼容版本

I, [2020-08-28T17:53:57.578920 #1]  INFO -- : > cd /var/www/discourse && su discourse -c 'bundle exec rake db:migrate'
2020-08-28 17:54:07.380 UTC [3060] discourse@discourse ERROR:  duplicate key value violates unique constraint "data_explorer_queries_pkey"
2020-08-28 17:54:07.380 UTC [3060] discourse@discourse DETAIL:  Key (id)=(-7) already exists.
2020-08-28 17:54:07.380 UTC [3060] discourse@discourse STATEMENT:  INSERT INTO data_explorer_queries(id, name, description, sql, user_id, last_run_at, hidden, created_at, updated_at)
        SELECT
          (replace(key, 'q:',''))::integer,
          value::json->>'name',
          value::json->>'description',
          value::json->>'sql',
          CASE WHEN (value::json->'created_by')::text = 'null' THEN
            null
          WHEN (value::json->'created_by')::text = '""' THEN
            null
          WHEN (value::jsonb ? 'created_by') THEN
            (value::json->>'created_by')::integer
          ELSE
            null
          END,
          CASE WHEN (value::json->'last_run_at')::text = 'null' THEN
            null
          WHEN (value::json->'last_run_at')::text = '""' THEN
            null
          ELSE
            (value::json->'last_run_at')::text::timestamptz
          END,
          CASE WHEN (value::json->'hidden')::text = 'null' THEN
            false
          WHEN (value::jsonb ? 'hidden') THEN
            (value::json->'hidden')::text::boolean
          ELSE
            false
          END,
          '2020-08-28 17:54:07.368132',
          '2020-08-28 17:54:07.368132'
        FROM plugin_store_rows
        WHERE plugin_name = 'discourse-data-explorer' AND type_name = 'JSON' AND (replace(key, 'q:',''))::integer < 0

rake aborted!
StandardError: 发生了一个错误，此迁移及后续所有迁移已取消：

ERROR:  duplicate key value violates unique constraint "data_explorer_queries_pkey"

关键部分是 ERROR: duplicate key value violates unique constraint "data_explorer_queries_pkey"。

我已经在 Rails 控制台中找到了 id 为 -7 的查询，但它似乎是内置查询之一。

[5] pry(main)> DataExplorer::Query.find(-7)
=> #<DataExplorer::Query:0x000055e44bbb4038
 @created_by="-1",
 @description="based on post score calculated using reply count, likes, incoming links, bookmarks, time spent and read count.",
 @group_ids=[],
 @hidden=nil,
 @id=-7,
 @last_run_at="2020-01-03T18:06:31.966+00:00",
 @name="Top 50 Quality Users",
 @sql=
  "SELECT sum(p.score) / count(p) AS \"average score per post\",\n    count(p.id) AS post_count,\n    p.user_id\nFROM posts p\nJOIN users u ON u.id = p.user_id\nWHERE p.created_at >= CURRENT_DATE - INTERVAL '6 month'\nAND NOT u.admin\nAND u.active\nGROUP BY user_id,\n    u.views\nHAVING count(p.id) > 50\nORDER BY sum(p.score) / count(p) DESC\nLIMIT 50">

我也进入了 plsql 提示符，但不确定——我是否应该删除一个内置查询，以便允许插入一个新的查询？

[Falco]

进入 psql 并执行以下命令：

     SELECT
          (replace(key, 'q:',''))::integer,
          value::json->>'name',
          value::json->>'description',
          value::json->>'sql',
          CASE WHEN (value::json->'created_by')::text = 'null' THEN
            null
          WHEN (value::json->'created_by')::text = '""' THEN
            null
          WHEN (value::jsonb ? 'created_by') THEN
            (value::json->>'created_by')::integer
          ELSE
            null
          END,
          CASE WHEN (value::json->'last_run_at')::text = 'null' THEN
            null
          WHEN (value::json->'last_run_at')::text = '""' THEN
            null
          ELSE
            (value::json->'last_run_at')::text::timestamptz
          END,
          CASE WHEN (value::json->'hidden')::text = 'null' THEN
            false
          WHEN (value::jsonb ? 'hidden') THEN
            (value::json->'hidden')::text::boolean
          ELSE
            false
          END,
          '2020-08-28 17:54:07.368132',
          '2020-08-28 17:54:07.368132'
        FROM plugin_store_rows
        WHERE plugin_name = 'discourse-data-explorer' AND type_name = 'JSON' AND (replace(key, 'q:',''))::integer < 0;

[merefield (Robert)]

这返回了两行看起来完全相同的数据。“Top 50 Quality Users”

奇怪的是，如果我执行：

[3] pry(main)> PluginStoreRow.where(plugin_name: 'discourse-data-explorer', key: "q:-7")
=> [#<PluginStoreRow:0x000055e280408bf8
  id: 1286,
  plugin_name: "discourse-data-explorer",
  key: "q:-7",
  type_name: "JSON",
  value:
   "{\"id\":-7,\"name\":\"Top 50 Quality Users\",\"description\":\"based on post score calculated using reply count, likes, incoming links, bookmarks, time spent and read count.\",\"sql\":\"SELECT sum(p.score) / count(p) AS \\\"average score per post\\\",\\n    count(p.id) AS post_count,\\n    p.user_id\\nFROM posts p\\nJOIN users u ON u.id = p.user_id\\nWHERE p.created_at \\u003e= CURRENT_DATE - INTERVAL '6 month'\\nAND NOT u.admin\\nAND u.active\\nGROUP BY user_id,\\n    u.views\\nHAVING count(p.id)
 \\u003e 50\\nORDER BY sum(p.score) / count(p) DESC\\nLIMIT 50\\n\",\"created_by\":\"-1\",\"created_at\":null,\"group_ids\":[],\"last_run_at\":\"2020-01-03T18:06:31.966+00:00\"}">
]

看起来我只有一条 id 为 -7 的记录？

[merefield (Robert)]

好的，如果我把这个简化为：

select * from plugin_store_rows WHERE plugin_name = 'discourse-data-explorer' AND type_name = 'JSON' AND (replace(key, 'q:',''))::integer < 0;

这会返回两行完全相同的记录（除了’id’字段）。

我想我应该鼓起勇气删除其中一行！

附：已处理，删除了较新的记录，正在重建。

（使用了 DELETE from plugin_store_rows WHERE id = $$$重复记录的 id$$$;）

迁移现在成功了！

感谢 @Falco 的推动。

[Falco]

这正是我们转向专用表的全部原因，以防止未来再次出现此类情况。可惜你提前遇到了这个问题😜

[j127]

感谢您提供的详细修复方案。我遇到了同样的问题（两个重复的 id），该方案生效了。