MongoDB失敗，因爲關鍵太大索引

我一直在試圖保存一個MongoDB文件，並得到一個奇怪的錯誤，關鍵是太大，索引。我提供以下功能文件的例子，還有一個創建的錯誤：MongoDB失敗，因爲關鍵太大索引

功能：

{ uniquenumber: 'Valid Until Addition of Restrictions', 
    name: 'Valid Until Addition of Restrictions' 
    fieldofstudy: 'Valid Until Addition of Restrictions', 
    section: 'Valid Until Addition of Restrictions', 
    restrictions: 
    { 'Must be assigned one of the following Student Attributes': 
     [ 'Non-Res. In-State', 
     'Non-Res. Out-of-State', 
     'DE Student Non-Res Out-of-St', 
     'Resident In-State', 
     'Res. Out-of-State' ], 
    'Must be enrolled in one of the following Levels': [ 'Graduate' ] }, 
    times: [], 
    professors: [ 'Jo Blo' ] }

非功能性：

{ 
    "uniquenumber": "Valid Until Addition of Restrictions", 
    "name": "Valid Until Addition of Restrictions", 
    "fieldofstudy": "Valid Until Addition of Restrictions", 
    "section": 'Valid Until Addition of Restrictions', 
    "restrictions": { 
     "May not be enrolled in one of the following Programs": ["MA [LA] Non-thesis option", "MS [AG] Non-thesis option", "MS [AR] Non-thesis option", "MS [BA] Non-thesis option", "MS [COFD] Non-thesis option", "MS [ED] Non-thesis option", "MS [EN] Non-thesis option", "MS [GE] Non-thesis option", "MS [LA] Non-thesis option", "MS [SC] Non-thesis option", "MS [VM] Non-thesis option", "MS NTO (Special Programs)", "MUP [AR] Non-thesis option"], 
     "Must be enrolled in one of the following Levels": ["Graduate"], 
     "May not be enrolled in one of the following Degrees": ["Master of Agribusiness", "Master of Agriculture", "Master of Architecture", "Master of Business Admin.", "Master of Computer Science", "Master of Education", "Master of Engineering", "Master of Land Econ & Real Est", "Master of Geoscience", "Master of Landscape Arch.", "Master of Public Administratn", "Master of Public Health", "Master of Public Svc & Admin"], 
     "May not be enrolled in one of the following Colleges": ["English Language Institute"], 
     "Must be assigned one of the following Student Attributes": ["Non-Res. In-State", "Non-Res. Out-of-State", "DE Student Non-Res Out-of-St", "Resident In-State", "Res. Out-of-State"], 
     "Must be enrolled in one of the following Classifications": ["G7-Graduate, Master's Level", "G8-Graduate, Doctoral Level", "G9-Graduate, Mas/Doc Admitted"] 
    }, 
    "times": [], 
    "professors": [] 
}

直到創造的restrictions對象，刮刀正常工作，所以我相信錯誤可以縮小到那裏。但是，我不清楚哪些鍵「太大」而無法被索引。如果我的猜測是正確的，爲什麼Mongo把它算作關鍵，我該如何彌補這種情況？

編輯：於db.Section.getIndexes();響應如下所示：

[ 
     { 
       "v" : 2, 
       "key" : { 
         "_id" : 1 
       }, 
       "name" : "_id_", 
       "ns" : "database.Section" 
     }, 
     { 
       "v" : 2, 
       "unique" : true, 
       "key" : { 
         "uniquenumber" : 1 
       }, 
       "name" : "uniquenumber_1", 
       "ns" : "database.Section", 
       "background" : true 
     }, 
     { 
       "v" : 2, 
       "key" : { 
         "name" : 1 
       }, 
       "name" : "name_1", 
       "ns" : "database.Section", 
       "background" : true 
     }, 
     { 
       "v" : 2, 
       "key" : { 
         "fieldofstudy" : 1 
       }, 
       "name" : "fieldofstudy_1", 
       "ns" : "database.Section", 
       "background" : true 
     }, 
     { 
       "v" : 2, 
       "key" : { 
         "course" : 1 
       }, 
       "name" : "course_1", 
       "ns" : "database.Section", 
       "background" : true 
     }, 
     { 
       "v" : 2, 
       "key" : { 
         "section" : 1 
       }, 
       "name" : "section_1", 
       "ns" : "database.Section", 
       "background" : true 
     }, 
     { 
       "v" : 2, 
       "key" : { 
         "professors" : 1 
       }, 
       "name" : "professors_1", 
       "ns" : "database.Section", 
       "background" : true 
     }, 
     { 
       "v" : 2, 
       "key" : { 
         "times" : 1 
       }, 
       "name" : "times_1", 
       "ns" : "database.Section", 
       "background" : true 
     }, 
     { 
       "v" : 2, 
       "key" : { 
         "restrictions" : 1 
       }, 
       "name" : "restrictions_1", 
       "ns" : "database.Section", 
       "background" : true 
     } 
]

來源

2017-06-04 Quontas

喜Quontas;你能告訴我們你在這個系列上有什麼索引嗎？ –

作爲參考，索引條目的總大小必須小於1024字節（https://docs.mongodb.com/manual/reference/limits/#Index-Key-Limit）。該錯誤表示索引存在於此集合上，以致非功能文檔中的值超出此限制。如果不知道現有的索引，我們不能說是什麼原因導致了失敗，但我猜測你已經爲「限制」字段建立了索引。 –

原始帖子中顯示了對'db.Section.getIndexes（）;'的響應。 – Quontas

你有一個指數restrictions其中，根據您的數據，完全是無用的，因爲這是一個子文件將是非常大的。

你可能想從收集丟棄指數：

db.Section.dropIndex({restrictions: 1});

來源

2017-06-05 14:31:29 JohnnyHK

MongoDB失敗，因爲關鍵太大索引

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