什么样的对象 db._collections() return ArangoDB？

Question

在 Foxx 上下文中，我使用数据库方法访问 arango 中的所有集合 db._collections()。 return 值是一个数组。但是数组内部，每个"object"不是字符串，不是数组，不是一个object.What是它们的类型吗？

示例return：

//This is 1 array. Correct
[ 
 //Each should be an array but they are not.
  [ArangoCollection 41, "_analyzers" (type document, status loaded)], 
  [ArangoCollection 38, "_appbundles" (type document, status loaded)], 
  [ArangoCollection 31, "_apps" (type document, status loaded)], 
  [ArangoCollection 14, "_aqlfunctions" (type document, status loaded)], 
  [ArangoCollection 4, "_graphs" (type document, status loaded)], 
  [ArangoCollection 20, "_jobs" (type document, status loaded)], 
  [ArangoCollection 17, "_queues" (type document, status loaded)], 
  [ArangoCollection 67, "_statistics" (type document, status loaded)], 
  [ArangoCollection 74, "_statistics15" (type document, status loaded)], 
  [ArangoCollection 60, "_statisticsRaw" (type document, status loaded)], 
  [ArangoCollection 7, "_users" (type document, status loaded)], 
  [ArangoCollection 95, "animals" (type document, status loaded)], 
  [ArangoCollection 89, "demo" (type document, status loaded)], 
  [ArangoCollection 73882, "example" (type document, status loaded)] 
]

Answer 1

db._collections() returns ArangoCollection 个对象的数组。您可以通过运行标准 JavaScript 检查方法（例如 Object.keys(...) ）了解此类对象，例如

obj = db._collections()[0]; 
Object.keys(obj).forEach(function(key) { 
  require("console").log(key + ' (' + typeof obj[key] + ')'); 
});

什么样的对象 db._collections() return ArangoDB？

What kind of object db._collections() return ArangoDB?

javascript

arangodb

foxx