MongoDB 中的索引列表？

From the shell:

db.test.getIndexes()

For shell help you should try:

help;
db.help();
db.test.help();

Make sure you use your collection:

db.collection.getIndexes()

http://docs.mongodb.org/manual/administration/indexes/#information-about-indexes

And if you want to get list of all indexes in your database:

use "yourdbname"


db.system.indexes.find()

You can also output all your indexes together with their size:

db.collectionName.stats().indexSizes

Also check that db.collectionName.stats() gives you a lot of interesting information like paddingFactor, size of the collection and number of elements inside of it.

If you want to list all indexes across collections:

db.getCollectionNames().forEach(function(collection) {
indexes = db.getCollection(collection).getIndexes();
print("Indexes for " + collection + ":");
printjson(indexes);
});

Taking this one step further, if you'd like to find all indexes on all collections, this script (modified from Juan Carlos Farah's script here) gives you some useful output, including a JSON printout of the index details:

 // Switch to admin database and get list of databases.
db = db.getSiblingDB("admin");
dbs = db.runCommand({ "listDatabases": 1}).databases;




// Iterate through each database and get its collections.
dbs.forEach(function(database) {
db = db.getSiblingDB(database.name);
cols = db.getCollectionNames();


// Iterate through each collection.
cols.forEach(function(col) {


//Find all indexes for each collection
indexes = db[col].getIndexes();


indexes.forEach(function(idx) {
print("Database:" + database.name + " | Collection:" +col+ " | Index:" + idx.name);
printjson(indexes);
});




});


});

Using an old version of MongoDB here but one of the top answers in this question here did not work for me. This one worked:

db.getCollectionNames().forEach(function(collection) {
print("Collection: '" + collection);
print(db.getCollection(collection).getIndexes())
});