{"id":184850,"date":"2023-06-27T04:59:36","date_gmt":"2023-06-26T20:59:36","guid":{"rendered":"http:\/\/www.idc.net\/help\/184850\/"},"modified":"2023-06-27T04:59:36","modified_gmt":"2023-06-26T20:59:36","slug":"%e5%90%8e%e6%b5%aa%e4%ba%91%e5%b0%8f%e7%a8%8b%e5%ba%8f%e6%95%99%e7%a8%8b%ef%bc%9asdk%e6%95%b0%e6%8d%ae%e5%ba%93-command%c2%b7%e8%81%9a%e5%90%88%e6%93%8d%e4%bd%9c%e7%ac%a6%c2%b7%e6%af%94%e8%be%83","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/184850\/","title":{"rendered":"\u540e\u6d6a\u4e91\u5c0f\u7a0b\u5e8f\u6559\u7a0b\uff1aSDK\u6570\u636e\u5e93 Command\u00b7\u805a\u5408\u64cd\u4f5c\u7b26\u00b7\u6bd4\u8f83\u64cd\u4f5c\u7b26"},"content":{"rendered":"

AggregateCommand.cmp(value: Expression[]): Object<\/h2>\n

\n \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n

\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u7ed9\u5b9a\u4e24\u4e2a\u503c\uff0c\u8fd4\u56de\u5176\u6bd4\u8f83\u503c\uff1a<\/p>\n

\u53c2\u6570<\/h2>\n

value: Expression[]<\/h3>\n

[<expression1>, <expression2>]<\/p>\n

\u8fd4\u56de\u503c<\/h2>\n

Object<\/h3>\n

API \u8bf4\u660e<\/h2>\n

\u5982\u679c\u7b2c\u4e00\u4e2a\u503c\u5c0f\u4e8e\u7b2c\u4e8c\u4e2a\u503c\uff0c\u8fd4\u56de -1 \u5982\u679c\u7b2c\u4e00\u4e2a\u503c\u5927\u4e8e\u7b2c\u4e8c\u4e2a\u503c\uff0c\u8fd4\u56de 1 \u5982\u679c\u4e24\u4e2a\u503c\u76f8\u7b49\uff0c\u8fd4\u56de 0<\/p>\n

\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n

db.command.aggregate.cmp([<expression1>, <expression2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"shop1\": 10, \"shop2\": 100 }\n{ \"_id\": 2, \"shop1\": 80, \"shop2\": 20 }\n{ \"_id\": 3, \"shop1\": 50, \"shop2\": 50 }\n<\/code><\/pre>\n
\u6c42 shop1 \u548c shop2 \u7684\u5404\u4e2a\u7269\u54c1\u7684\u4ef7\u683c\u5bf9\u6bd4\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    compare: $.cmp(['$shop1', '$shop2']))\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"compare\": -1 }\n{ \"_id\": 2, \"compare\": 1 }\n{ \"_id\": 3, \"compare\": 0 }<\/code><\/pre>\n
\n
AggregateCommand.eq(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u76f8\u7b49\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.eq([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u6c42 value \u7b49\u4e8e 50 \u7684\u8bb0\u5f55\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.eq(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": false }\n{ \"_id\": 2, \"matched\": false }\n{ \"_id\": 3, \"matched\": true }<\/code><\/pre>\n
\n
AggregateCommand.gt(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u524d\u8005\u5927\u4e8e\u540e\u8005\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.gt([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u5224\u65ad value \u662f\u5426\u5927\u4e8e 50\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.gt(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": false }\n{ \"_id\": 2, \"matched\": true }\n{ \"_id\": 3, \"matched\": false }<\/code><\/pre>\n
\n
AggregateCommand.gte(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u524d\u8005\u5927\u4e8e\u6216\u7b49\u4e8e\u540e\u8005\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.gte([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u5224\u65ad value \u662f\u5426\u5927\u4e8e\u6216\u7b49\u4e8e 50\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.gte(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": false }\n{ \"_id\": 2, \"matched\": true }\n{ \"_id\": 3, \"matched\": true }<\/code><\/pre>\n
\n
AggregateCommand.lt(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u524d\u8005\u5c0f\u4e8e\u540e\u8005\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.lt([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u5224\u65ad value \u662f\u5426\u5c0f\u4e8e 50\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.lt(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": true }\n{ \"_id\": 2, \"matched\": false }\n{ \"_id\": 3, \"matched\": false }<\/code><\/pre>\n
\n
AggregateCommand.lte(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u524d\u8005\u5c0f\u4e8e\u6216\u7b49\u4e8e\u540e\u8005\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.lte([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u5224\u65ad value \u662f\u5426\u5c0f\u4e8e 50\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.lte(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": true }\n{ \"_id\": 2, \"matched\": false }\n{ \"_id\": 3, \"matched\": true }<\/code><\/pre>\n
\n
AggregateCommand.neq(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u4e0d\u76f8\u7b49\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.neq([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u6c42 value \u4e0d\u7b49\u4e8e 50 \u7684\u8bb0\u5f55\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.neq(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": true }\n{ \"_id\": 2, \"matched\": true }\n{ \"_id\": 3, \"matched\": false }<\/code><\/pre>\n
<\/p>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u7ed9\u5b9a\u4e24\u4e2a\u503c\uff0c\u8fd4\u56de\u5176\u6bd4\u8f83\u503c\uff1a<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<expression1>, <expression2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u5982\u679c\u7b2c\u4e00\u4e2a\u503c\u5c0f\u4e8e\u7b2c\u4e8c\u4e2a\u503c\uff0c\u8fd4\u56de -1 \u5982\u679c\u7b2c\u4e00\u4e2a\u503c\u5927\u4e8e\u7b2c\u4e8c\u4e2a\u503c\uff0c\u8fd4\u56de 1 \u5982\u679c\u4e24\u4e2a\u503c\u76f8\u7b49\uff0c\u8fd4\u56de 0<\/p>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.cmp([<expression1>, <expression2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"shop1\": 10, \"shop2\": 100 }\n{ \"_id\": 2, \"shop1\": 80, \"shop2\": 20 }\n{ \"_id\": 3, \"shop1\": 50, \"shop2\": 50 }\n<\/code><\/pre>\n
\u6c42 shop1 \u548c shop2 \u7684\u5404\u4e2a\u7269\u54c1\u7684\u4ef7\u683c\u5bf9\u6bd4\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    compare: $.cmp(['$shop1', '$shop2']))\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"compare\": -1 }\n{ \"_id\": 2, \"compare\": 1 }\n{ \"_id\": 3, \"compare\": 0 }<\/code><\/pre>\n
\n
AggregateCommand.eq(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u76f8\u7b49\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.eq([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u6c42 value \u7b49\u4e8e 50 \u7684\u8bb0\u5f55\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.eq(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": false }\n{ \"_id\": 2, \"matched\": false }\n{ \"_id\": 3, \"matched\": true }<\/code><\/pre>\n
\n
AggregateCommand.gt(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u524d\u8005\u5927\u4e8e\u540e\u8005\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.gt([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u5224\u65ad value \u662f\u5426\u5927\u4e8e 50\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.gt(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": false }\n{ \"_id\": 2, \"matched\": true }\n{ \"_id\": 3, \"matched\": false }<\/code><\/pre>\n
\n
AggregateCommand.gte(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u524d\u8005\u5927\u4e8e\u6216\u7b49\u4e8e\u540e\u8005\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.gte([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u5224\u65ad value \u662f\u5426\u5927\u4e8e\u6216\u7b49\u4e8e 50\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.gte(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": false }\n{ \"_id\": 2, \"matched\": true }\n{ \"_id\": 3, \"matched\": true }<\/code><\/pre>\n
\n
AggregateCommand.lt(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u524d\u8005\u5c0f\u4e8e\u540e\u8005\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.lt([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u5224\u65ad value \u662f\u5426\u5c0f\u4e8e 50\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.lt(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": true }\n{ \"_id\": 2, \"matched\": false }\n{ \"_id\": 3, \"matched\": false }<\/code><\/pre>\n
\n
AggregateCommand.lte(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u524d\u8005\u5c0f\u4e8e\u6216\u7b49\u4e8e\u540e\u8005\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.lte([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u5224\u65ad value \u662f\u5426\u5c0f\u4e8e 50\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.lte(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": true }\n{ \"_id\": 2, \"matched\": false }\n{ \"_id\": 3, \"matched\": true }<\/code><\/pre>\n
\n
AggregateCommand.neq(value: Expression[]): Object<\/h2>\n
\n  \u652f\u6301\u7aef\uff1a\u5c0f\u7a0b\u5e8f 2.7.4, \u4e91\u51fd\u6570 0.8.1, Web\n<\/p><\/blockquote>\n
\u805a\u5408\u64cd\u4f5c\u7b26\u3002\u5339\u914d\u4e24\u4e2a\u503c\uff0c\u5982\u679c\u4e0d\u76f8\u7b49\u5219\u8fd4\u56de true\uff0c\u5426\u5219\u8fd4\u56de false\u3002<\/p>\n
\u53c2\u6570<\/h2>\n
value: Expression[]<\/h3>\n
[<value1>, <value2>]<\/p>\n
\u8fd4\u56de\u503c<\/h2>\n
Object<\/h3>\n
API \u8bf4\u660e<\/h2>\n
\u8bed\u6cd5\u5982\u4e0b\uff1a<\/p>\n
db.command.aggregate.neq([<value1>, <value2>])\n<\/code><\/pre>\n
\u793a\u4f8b\u4ee3\u7801<\/h2>\n
\u5047\u8bbe\u96c6\u5408 price \u6709\u5982\u4e0b\u8bb0\u5f55\uff1a<\/p>\n
{ \"_id\": 1, \"value\": 10 }\n{ \"_id\": 2, \"value\": 80 }\n{ \"_id\": 3, \"value\": 50 }\n<\/code><\/pre>\n
\u6c42 value \u4e0d\u7b49\u4e8e 50 \u7684\u8bb0\u5f55\u3002<\/p>\n
const $ = db.command.aggregate\ndb.collection('price').aggregate()\n  .project({\n    matched: $.neq(['$value', 50])\n  })\n  .end()\n<\/code><\/pre>\n
\u8fd4\u56de\u7ed3\u679c\u5982\u4e0b\uff1a<\/p>\n
{ \"_id\": 1, \"matched\": true }\n{ \"_id\": 2, \"matched\": true }\n{ \"_id\": 3, \"matched\": false }<\/code><\/pre>\n
<\/p>\n","protected":false},"excerpt":{"rendered":"
AggregateCommand.cmp(value: Expression[]): Object  […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[182398],"tags":[],"class_list":["post-184850","post","type-post","status-publish","format-standard","hentry","category-mini-program"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/184850","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=184850"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/184850\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=184850"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=184850"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=184850"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}