我只是想知道如何更新mongo db文档中的嵌套数组字段。
这是我的架构的样子：
Operating system: Mac OS X
10.9.5 13F1911
CPU: amd64
family 6 model 42 stepping 7
4 CPUs
GPU: UNKNOWN
Crash reason: EXC_BREAKPOINT / EXC_I386_BPT
Crash address: 0x7fff669d609d
Process uptime: 3 seconds
Thread 8 (crashed)
0 dyld + 0x109d
rax = 0x00007fff66a0adb0 rdx = 0x0000000000000000
rcx = 0x0000000000000000 rbx = 0x00007fd96a50de60
rsi = 0x0000000000000000 rdi = 0x00007fff66a0af20
rbp = 0x000000010c2ee700 rsp = 0x000000010c2ee6e8
r8 = 0x00007fff669f5b8c r9 = 0x0000000000000000
r10 = 0x00007fff669f8d26 r11 = 0x00007fff66a0af20
r12 = 0x005b327ab9000001 r13 = 0x0000000000000000
r14 = 0x00007fff66a0af20 r15 = 0x00007fd96a508d10
rip = 0x00007fff669d609d
Found by: given as instruction pointer in context
1 dyld + 0x3df6
rbp = 0x000000010c2ee720 rsp = 0x000000010c2ee710
rip = 0x00007fff669d8df6
Found by: previous frame's frame pointer
2 libdyld.dylib + 0x12dd
rbp = 0x000000010c2ee870 rsp = 0x000000010c2ee730
rip = 0x00007fff86d462dd
Found by: previous frame's frame pointer
3 0x109d90008
rbp = 0x000000010c2ee8d0 rsp = 0x000000010c2ee880
rip = 0x0000000109d90008
Found by: previous frame's frame pointer
[...]
Loaded modules:
[...]
0x7fff669d5000 - 0x7fff66a08fff dyld 0.0.0.0 (WARNING: No symbols, dyld, 1D3130FEFE7E3C4C8E74EB51895B6BA50)
0x7fff83520000 - 0x7fff83593fff SecurityFoundation 55122.3.0.0
0x7fff8362d000 - 0x7fff837e5fff libicucore.A.dylib 51.1.0.0
0x7fff837e6000 - 0x7fff8380dfff libsystem_info.dylib 449.1.4.0
0x7fff83abf000 - 0x7fff83accfff libxar.1.dylib 1.0.0.0
0x7fff83c04000 - 0x7fff83c0bfff liblaunch.dylib 842.92.1.0
0x7fff83c0c000 - 0x7fff83cd6fff LaunchServices 572.32.0.0
0x7fff83dd2000 - 0x7fff83dd6fff libGIF.dylib 1.0.0.0
0x7fff83e12000 - 0x7fff83e42fff libncurses.5.4.dylib 5.4.0.0
0x7fff841ae000 - 0x7fff8423efff Metadata 800.30.0.0
0x7fff842d4000 - 0x7fff842d5fff libremovefile.dylib 33.0.0.0
0x7fff84387000 - 0x7fff84475fff libJP2.dylib 1.0.0.0
0x7fff84476000 - 0x7fff84481fff libkxld.dylib 1.0.0.0
0x7fff844a0000 - 0x7fff844a8fff libsystem_dnssd.dylib 522.92.3.0
0x7fff846b4000 - 0x7fff846cbfff CFOpenDirectory 1.0.0.0
0x7fff84e1c000 - 0x7fff851fdfff libLAPACK.dylib 1.0.0.0
0x7fff85bd0000 - 0x7fff85c92fff CoreText 1.0.0.0
0x7fff85c93000 - 0x7fff85ce0fff PrintCore 428.0.0.0
0x7fff85d6d000 - 0x7fff85de4fff OSServices 600.4.0.0
0x7fff85de5000 - 0x7fff85deffff ServiceManagement 1.0.0.0
0x7fff85e38000 - 0x7fff85e53fff libCRFSuite.dylib 1.0.0.0
0x7fff85e84000 - 0x7fff85e84fff libkeymgr.dylib 28.0.0.0
0x7fff85e85000 - 0x7fff85e89fff libheimdal-asn1.dylib 1.0.0.0
0x7fff85ea1000 - 0x7fff85ea8fff libcopyfile.dylib 103.92.1.0
0x7fff85ea9000 - 0x7fff85eb9fff libbsm.0.dylib 1.0.0.0
0x7fff85eba000 - 0x7fff85ec1fff libsystem_pthread.dylib 53.1.4.0 (WARNING: No symbols, libsystem_pthread.dylib, AB498556B555310E9041F67EC9E00E2C0)
0x7fff85ec2000 - 0x7fff85ec2fff CoreServices 59.0.0.0
0x7fff85f20000 - 0x7fff85f27fff NetFS 1.0.0.0
0x7fff864b2000 - 0x7fff864bdfff NetAuth 1.0.0.0
0x7fff864e1000 - 0x7fff86751fff Security 55471.14.40.0
0x7fff867a4000 - 0x7fff867adfff libsystem_notify.dylib 121.20.1.0
0x7fff867d7000 - 0x7fff867dcfff libunwind.dylib 35.3.0.0
0x7fff86813000 - 0x7fff86815fff libquarantine.dylib 71.0.0.0
0x7fff86816000 - 0x7fff86827fff libsystem_asl.dylib 217.1.4.0
0x7fff86887000 - 0x7fff868abfff libxpc.dylib 300.90.2.0
0x7fff869ad000 - 0x7fff86aa7fff libFontParser.dylib 1.0.0.0
0x7fff86ad3000 - 0x7fff86b2cfff libTIFF.dylib 1.0.0.0
0x7fff86b69000 - 0x7fff86cbdfff AudioToolbox 492.0.0.0
0x7fff86d45000 - 0x7fff86d48fff libdyld.dylib 239.5.0.0 (WARNING: No symbols, libdyld.dylib, CAE7A50DF1563D4781C0DC41EB975D380)
0x7fff878c0000 - 0x7fff8792dfff ATS 236.0.0.0
0x7fff8794d000 - 0x7fff8794dfff vecLib 423.32.0.0
0x7fff87efb000 - 0x7fff87f40fff HIServices 468.0.0.0
0x7fff87f4c000 - 0x7fff87f56fff libcommonCrypto.dylib 60049.0.0.0
0x7fff88229000 - 0x7fff8823afff libz.1.dylib 1.2.5.0
0x7fff8841f000 - 0x7fff88421fff libsystem_configuration.dylib 596.15.0.0
0x7fff88422000 - 0x7fff88423fff libsystem_sandbox.dylib 278.11.2.0
0x7fff8842b000 - 0x7fff8842bfff ApplicationServices 48.0.0.0
0x7fff88441000 - 0x7fff88442fff TrustEvaluationAgent 25.0.0.0
0x7fff8848a000 - 0x7fff884a5fff libsystem_malloc.dylib 23.10.1.0 (WARNING: No symbols, libsystem_malloc.dylib, A695B4E438E9332EA77229D31E3F13850)
0x7fff884a9000 - 0x7fff8859afff libiconv.2.dylib 7.0.0.0
0x7fff886d0000 - 0x7fff886dcfff OpenDirectory 1.0.0.0
0x7fff88758000 - 0x7fff887a6fff libcorecrypto.dylib 1.0.0.0
0x7fff887d2000 - 0x7fff8885bfff ColorSync 4.7.0.0
0x7fff89c2a000 - 0x7fff89c43fff Kerberos 6.0.0.0
0x7fff89c44000 - 0x7fff89c45fff liblangid.dylib 1.0.0.0
0x7fff89ea8000 - 0x7fff89eadfff libmacho.dylib 845.0.0.0
0x7fff8a24a000 - 0x7fff8a266fff libsystem_kernel.dylib 2422.115.15.0 (WARNING: No symbols, libsystem_kernel.dylib, 34ABAF79E1473C34B05D46A566E689CC0)
0x7fff8a278000 - 0x7fff8a328fff libvMisc.dylib 423.32.0.0
0x7fff8a342000 - 0x7fff8a3a5fff SystemConfiguration 596.15.0.0
0x7fff8a425000 - 0x7fff8a42efff CommonAuth 1.0.0.0
0x7fff8a5a7000 - 0x7fff8a5d0fff libc++abi.dylib 49.1.0.0
0x7fff8a5d1000 - 0x7fff8a5edfff libresolv.9.dylib 1.0.0.0
0x7fff8a6eb000 - 0x7fff8a71afff libsystem_m.dylib 3047.16.0.0
0x7fff8a730000 - 0x7fff8a757fff libsystem_network.dylib 241.4.0.0
0x7fff8abd1000 - 0x7fff8abf5fff libJPEG.dylib 1.0.0.0
0x7fff8ad46000 - 0x7fff8b01afff vImage 271.0.0.0
0x7fff8b20b000 - 0x7fff8b294fff libsystem_c.dylib 997.90.5.0 (WARNING: No symbols, libsystem_c.dylib, 889AA3F9121C39858B1D5E908C5693BC0)
0x7fff8b4ac000 - 0x7fff8b4b0fff libsystem_stats.dylib 93.90.3.0
0x7fff8b569000 - 0x7fff8b578fff LangAnalysis 1.0.0.0
0x7fff8b579000 - 0x7fff8b579fff Accelerate 4.0.0.0
0x7fff8bca4000 - 0x7fff8bcbffff libPng.dylib 1.0.0.0
0x7fff8bccd000 - 0x7fff8bccdfff libOpenScriptingUtil.dylib 1.0.0.0
0x7fff8be35000 - 0x7fff8c75efff CoreGraphics 600.0.0.0
0x7fff8cac1000 - 0x7fff8cb08fff libFontRegistry.dylib 1.0.0.0
0x7fff8cbaf000 - 0x7fff8cbb0fff libsystem_blocks.dylib 63.0.0.0
0x7fff8d035000 - 0x7fff8d03bfff libsystem_platform.dylib 24.90.1.0
0x7fff8d03c000 - 0x7fff8d03ffff IOSurface 1.0.0.0
0x7fff8d071000 - 0x7fff8d371fff Foundation 1056.17.0.0
0x7fff8d372000 - 0x7fff8d3d6fff DataDetectorsCore 354.5.0.0
0x7fff8d4fd000 - 0x7fff8d4fffff libRadiance.dylib 1.0.0.0
0x7fff8d500000 - 0x7fff8d501fff libDiagnosticMessagesClient.dylib 1.0.0.0
0x7fff8df59000 - 0x7fff8df66fff libbz2.1.0.dylib 1.0.5.0
0x7fff8e11e000 - 0x7fff8e127fff SpeechSynthesis 1.0.0.0
0x7fff8e1df000 - 0x7fff8e2c9fff libsqlite3.dylib 158.0.0.0
0x7fff8e2ca000 - 0x7fff8e2cdfff TCC 1.0.0.0
0x7fff8e2ce000 - 0x7fff8e2cffff libSystem.B.dylib 1197.1.1.0
0x7fff8e32c000 - 0x7fff8e387fff AE 665.6.0.0
0x7fff8ea6a000 - 0x7fff8ea92fff libxslt.1.dylib 3.26.0.0
0x7fff8ea93000 - 0x7fff8eb7bfff libxml2.2.dylib 10.9.0.0
0x7fff8eb86000 - 0x7fff8ebebfff Heimdal 1.0.0.0
0x7fff8ec48000 - 0x7fff8ef32fff CarbonCore 1077.17.0.0
0x7fff8ef33000 - 0x7fff8f03afff ImageIO 1.0.0.0
0x7fff8f0c1000 - 0x7fff8f12dfff IOKit 275.0.0.0
0x7fff8f21e000 - 0x7fff8f3cbfff libobjc.A.dylib 228.0.0.0
0x7fff8f58c000 - 0x7fff8f58dfff libunc.dylib 28.0.0.0
0x7fff8f58e000 - 0x7fff8f659fff libvDSP.dylib 423.32.0.0
0x7fff8f65a000 - 0x7fff8f674fff libdispatch.dylib 339.92.1.0 (WARNING: No symbols, libdispatch.dylib, C4E4A18D3C3B3C9C8709A4270D998DE70)
0x7fff8f71f000 - 0x7fff8f771fff libc++.1.dylib 120.0.0.0
0x7fff8fca0000 - 0x7fff8fcd9fff QD 298.0.0.0
0x7fff8ff1e000 - 0x7fff8ff22fff libcache.dylib 62.0.0.0
0x7fff8ff23000 - 0x7fff8ff65fff libauto.dylib 1.0.0.0
0x7fff8ff66000 - 0x7fff8ff6dfff libcompiler_rt.dylib 35.0.0.0
0x7fff8ff71000 - 0x7fff8ff75fff libpam.2.dylib 3.0.0.0
0x7fff902c7000 - 0x7fff90318fff CoreAudio 1.0.0.0
0x7fff90319000 - 0x7fff9031efff DiskArbitration 1.0.0.0
0x7fff903aa000 - 0x7fff90545fff CFNetwork 673.6.0.0
0x7fff90546000 - 0x7fff9056ffff DictionaryServices 1.0.0.0
0x7fff905ee000 - 0x7fff907d3fff CoreFoundation 855.17.0.0
0x7fff90833000 - 0x7fff909a1fff libBLAS.dylib 1.0.0.0
0x7fff90c01000 - 0x7fff90c48fff libcups.2.dylib 2.10.0.0
0x7fff90c49000 - 0x7fff90c78fff GSS 1.0.0.0
0x7fff90c79000 - 0x7fff90ce6fff SearchKit 200.1.0.0
这是文档的外观：
const userSchema = new Schema({
email: {type: String, unique: true, lowercase: true},
password: String,
firstName: String,
lastName : String,
role: String,
children: Array
});
}
我要在其中将新对象推送到“缺少”数组中。
答案 0 :(得分：1)
要执行此操作，您必须通过$push操作使用mongodb update运算符，我想这就是您要执行的操作，但是您没有指定匹配查询。要推送到absences，请执行此操作（我假设匹配查询为children.fullName）
db.ops.update( { "children.fullName": "John doe" } , { $push: { "children.$.absences": "data to push" } } );
$占位符告诉mongodb用匹配的数组索引将其自身（即$）替换。
如果要防止在absences字段中重复元素，则必须使用$addToSet运算符
db.ops.update( { "children.fullName": "John doe" } , { $addToSet: { "children.$.absences": "data to push" } } );