mongoose中报错 MongoError: E11000 duplicate key error collection、 code: 11000

痛定思痛。 2023-06-19 04:18 1阅读 0赞

### 问题描述：  ###

MongoError: E11000 duplicate key error collection: test.elementusers index: username_1 dup key: { username: "admin" }
        at Function.create (/Users/liangrumeng/Documents/HBuilderProjects/workspace/myapp/node_modules/mongodb/lib/core/error.js:44:12)
        at toError (/Users/liangrumeng/Documents/HBuilderProjects/workspace/myapp/node_modules/mongodb/lib/utils.js:150:22)
        at coll.s.topology.insert (/Users/liangrumeng/Documents/HBuilderProjects/workspace/myapp/node_modules/mongodb/lib/operations/common_functions.js:266:39)
        at handler (/Users/liangrumeng/Documents/HBuilderProjects/workspace/myapp/node_modules/mongodb/lib/core/sdam/topology.js:1000:24)
        at wireProtocol.(anonymous function) (/Users/liangrumeng/Documents/HBuilderProjects/workspace/myapp/node_modules/mongodb/lib/core/sdam/server.js:457:5)
        at /Users/liangrumeng/Documents/HBuilderProjects/workspace/myapp/node_modules/mongodb/lib/core/connection/pool.js:408:18
        at process._tickCallback (internal/process/next_tick.js:61:11)
      driver: true,
      name: 'MongoError',
      index: 0,
      code: 11000,
      keyPattern: { username: 1 },
      keyValue: { username: 'admin' },
      errmsg:
       'E11000 duplicate key error collection: test.elementusers index: username_1 dup key: { username: "admin" }',
      [Symbol(mongoErrorContextSymbol)]: {}

MongoError: E11000 duplicate key error collection: test.elementusers index: username\_1 dup key: \{ username: "admin" \}  
    at Function.create   
  driver: true,  
  name: 'MongoError',  
  index: 0,  
  code: 11000,  
  keyPattern: \{ username: 1 \},  
  keyValue: \{ username: 'admin' \},  
  errmsg:  
   'E11000 duplicate key error collection: test.elementusers index: username\_1 dup key: \{ username: "admin" \}',  
  \[Symbol(mongoErrorContextSymbol)\]: \{\}

### 原因： ###

因为在Schema中设置了unique:true， 所以注册的用户名必须是唯一的。

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L01pc3NfbGlhbmdybQ_size_16_color_FFFFFF_t_70][]

可以在err里面进行相应的判断。

if(err.code == '11000'){
        res.json({
            msg:'该用户名已经注册过了，请换个用户名',
            success:false
        })
    }

ღ( ´･ᴗ･\` )❤完。

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