无法启动流星项目只有两行代码

Question

我试图学习流星，并通过流星技巧，并在js文件中的第二行“PlayersList = new Mongo.Collection（'players'）;”导致它无法运行。它说我在子​​目录中有一个重复的文件，但我不确定这是可能的，因为我在那里只有三个文件是leaderboard.css，leaderboard.html和leaderboard.js。

我不确定如何格式化以提高可读性，感谢您的帮助！

这里的日志：

C:\Users\jeffr_000\Documents\leaderboard>meteor 
[[[[[ C:\Users\jeffr_000\Documents\leaderboard ]]]]] 

=> Started proxy. 
=> Started MongoDB. 
=> Exited with code: 8 
W20150406-12:20:14.063(-7)? (STDERR) 
W20150406-12:20:14.065(-7)? (STDERR) C:\Users\jeffr_000\AppData\Local\.meteor\pa 
ckages\meteor-tool\1.1.3\mt-os.windows.x86_32\dev_bundle\server-lib\node_modules 
\fibers\future.js:245 
W20150406-12:20:14.065(-7)? (STDERR) 
throw(ex); 
W20150406-12:20:14.066(-7)? (STDERR) 
    ^
W20150406-12:20:14.066(-7)? (STDERR) Error: A method named '/member/insert' is a 
lready defined 
W20150406-12:20:14.066(-7)? (STDERR)  at packages/ddp/livedata_server.js:1461 
:1 
W20150406-12:20:14.066(-7)? (STDERR)  at Function._.each._.forEach (packages/ 
underscore/underscore.js:113:1) 
W20150406-12:20:14.066(-7)? (STDERR)  at [object Object]._.extend.methods (pa 
ckages/ddp/livedata_server.js:1459:1) 
W20150406-12:20:14.067(-7)? (STDERR)  at [object Object].Mongo.Collection._de 
fineMutationMethods (packages/mongo/collection.js:904:1) 
W20150406-12:20:14.067(-7)? (STDERR)  at new Mongo.Collection (packages/mongo 
/collection.js:209:1) 
W20150406-12:20:14.067(-7)? (STDERR)  at app\leaderboard.js:3:14 
W20150406-12:20:14.067(-7)? (STDERR)  at app\leaderboard.js:5:3 
W20150406-12:20:14.068(-7)? (STDERR)  at C:\Users\jeffr_000\Documents\leaderb 
oard\.meteor\local\build\programs\server\boot.js:222:10 
W20150406-12:20:14.068(-7)? (STDERR)  at Array.forEach (native) 
W20150406-12:20:14.068(-7)? (STDERR)  at Function._.each._.forEach (C:\Users\ 
jeffr_000\AppData\Local\.meteor\packages\meteor-tool\1.1.3\mt-os.windows.x86_32\ 
dev_bundle\server-lib\node_modules\underscore\underscore.js:79:11) 
W20150406-12:20:20.151(-7)? (STDERR) 
W20150406-12:20:20.151(-7)? (STDERR) C:\Users\jeffr_000\AppData\Local\.meteor\pa 
ckages\meteor-tool\1.1.3\mt-os.windows.x86_32\dev_bundle\server-lib\node_modules 
\fibers\future.js:245 
W20150406-12:20:20.152(-7)? (STDERR) 
throw(ex); 
W20150406-12:20:20.152(-7)? (STDERR) 
    ^
W20150406-12:20:20.152(-7)? (STDERR) Error: A method named '/member/insert' is a 
lready defined 
W20150406-12:20:20.152(-7)? (STDERR)  at packages/ddp/livedata_server.js:1461 
:1 
W20150406-12:20:20.153(-7)? (STDERR)  at Function._.each._.forEach (packages/ 
underscore/underscore.js:113:1) 
W20150406-12:20:20.153(-7)? (STDERR)  at [object Object]._.extend.methods (pa 
ckages/ddp/livedata_server.js:1459:1) 
W20150406-12:20:20.153(-7)? (STDERR)  at [object Object].Mongo.Collection._de 
fineMutationMethods (packages/mongo/collection.js:904:1) 
W20150406-12:20:20.154(-7)? (STDERR)  at new Mongo.Collection (packages/mongo 
/collection.js:209:1) 
W20150406-12:20:20.154(-7)? (STDERR)  at app\leaderboard.js:3:14 
W20150406-12:20:20.154(-7)? (STDERR)  at app\leaderboard.js:5:3 
W20150406-12:20:20.155(-7)? (STDERR)  at C:\Users\jeffr_000\Documents\leaderb 
oard\.meteor\local\build\programs\server\boot.js:222:10 
W20150406-12:20:20.155(-7)? (STDERR)  at Array.forEach (native) 
W20150406-12:20:20.155(-7)? (STDERR)  at Function._.each._.forEach (C:\Users\ 
jeffr_000\AppData\Local\.meteor\packages\meteor-tool\1.1.3\mt-os.windows.x86_32\ 
dev_bundle\server-lib\node_modules\underscore\underscore.js:79:11) 
=> Exited with code: 8 
W20150406-12:20:26.038(-7)? (STDERR) 
W20150406-12:20:26.038(-7)? (STDERR) C:\Users\jeffr_000\AppData\Local\.meteor\pa 
ckages\meteor-tool\1.1.3\mt-os.windows.x86_32\dev_bundle\server-lib\node_modules 
\fibers\future.js:245 
W20150406-12:20:26.038(-7)? (STDERR) 
throw(ex); 
W20150406-12:20:26.038(-7)? (STDERR) 
    ^
W20150406-12:20:26.038(-7)? (STDERR) Error: A method named '/member/insert' is a 
lready defined 
W20150406-12:20:26.039(-7)? (STDERR)  at packages/ddp/livedata_server.js:1461 
:1 
W20150406-12:20:26.039(-7)? (STDERR)  at Function._.each._.forEach (packages/ 
underscore/underscore.js:113:1) 
W20150406-12:20:26.039(-7)? (STDERR)  at [object Object]._.extend.methods (pa 
ckages/ddp/livedata_server.js:1459:1) 
W20150406-12:20:26.040(-7)? (STDERR)  at [object Object].Mongo.Collection._de 
fineMutationMethods (packages/mongo/collection.js:904:1) 
W20150406-12:20:26.040(-7)? (STDERR)  at new Mongo.Collection (packages/mongo 
/collection.js:209:1) 
W20150406-12:20:26.040(-7)? (STDERR)  at app\leaderboard.js:3:14 
W20150406-12:20:26.041(-7)? (STDERR)  at app\leaderboard.js:5:3 
W20150406-12:20:26.041(-7)? (STDERR)  at C:\Users\jeffr_000\Documents\leaderb 
oard\.meteor\local\build\programs\server\boot.js:222:10 
W20150406-12:20:26.041(-7)? (STDERR)  at Array.forEach (native) 
=> Exited with code: 8 
=> Your application is crashing. Waiting for file change. 
W20150406-12:20:26.042(-7)? (STDERR)  at Function._.each._.forEach (C:\Users\ 
jeffr_000\AppData\Local\.meteor\packages\meteor-tool\1.1.3\mt-os.windows.x86_32\ 
dev_bundle\server-lib\node_modules\underscore\underscore.js:79:11) 

Answer 1

通常，当您遇到错误，如A method named '/member/insert' is a lready defined，这意味着你正在创建不止一个时间new Mongo.Collection('member')更多。

也许你正在做一个Array.forEach函数（如果你的数组有多个元素，它会多次调用）。

从您的错误日志中可以看出它是由在_.each(array,fn)的server\boot.js造成的。