title: Importing long values into mongodb
body: <p>How do I import a <code>NumberLong</code> into MongoDB using <code>mongoimport</code>?</p>
  
  <p>Unfortunately, entries like these in a json file cause an error:</p>
  
  <pre><code>{"_id": NumberLong(123)}
  {"_id": NumberLong("123")}
  </code></pre>
  
  <p>Result:</p>
  
  <pre><code>Mon Nov 12 14:41:46 Assertion: 10340:Failure parsing JSON string near: "_id": Num
  0xaf6b21 0xabe459 0xabe5dc 0x7b93ad 0x56160d 0x5630f4 0xabb412 0x5546bc 0x7f961b79776d 0x554549 
   mongoimport(_ZN5mongo15printStackTraceERSo+0x21) [0xaf6b21]
   mongoimport(_ZN5mongo11msgassertedEiPKc+0x99) [0xabe459]
   mongoimport() [0xabe5dc]
   mongoimport(_ZN5mongo8fromjsonEPKcPi+0x56d) [0x7b93ad]
   mongoimport(_ZN6Import8parseRowEPSiRN5mongo7BSONObjERi+0xa2d) [0x56160d]
   mongoimport(_ZN6Import3runEv+0x1314) [0x5630f4]
   mongoimport(_ZN5mongo4Tool4mainEiPPc+0x1712) [0xabb412]
   mongoimport(main+0x2c) [0x5546bc]
   /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xed) [0x7f961b79776d]
   mongoimport(__gxx_personality_v0+0x419) [0x554549]
  Mon Nov 12 14:41:46 exception:BSON representation of supplied JSON is too large: Failure parsing JSON string near: "_id": Num
  Mon Nov 12 14:41:46 
  Mon Nov 12 14:41:46 imported 0 objects
  Mon Nov 12 14:41:46 ERROR: encountered 1 error
  </code></pre>