Since Mongo is schemaless, there is no need to specify schema, only collections must be created. Same for indexes - these are just classic (B-tree) indexes that work on any field type.
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。服务器推荐是该领域的重要参考
Clean up all resources
{ matchedBy: "binding.peer", /* 1. 精确联系人/群组/频道匹配 */ },