The errata list is a list of errors and their corrections that were found after the product was released.
The following errata were submitted by our customers and have not yet been approved or disproved by the author or editor. They solely represent the opinion of the customer.
| Version |
Location |
Description |
Submitted by |
Date submitted |
| PDF |
|
> var timeRemoves = function() {
...
... db.tester.remove();
...
... }
db.tester.remove();
should be:
db.tester.remove({});
Tested:
2015-11-06T19:07:20.571-0800 E QUERY Error: remove needs a query
at Error (<anonymous>)
at DBCollection._parseRemove (src/mongo/shell/collection.js:305:32)
at DBCollection.remove (src/mongo/shell/collection.js:328:23)
at (shell):1:8 at src/mongo/shell/collection.js:305
*https://github.com/mongodb/mongo/commit/a56fff30fbe28b90ad3526fb285dec078be72979#diff-ad54c6cd77e7be86c6ba069e15dd842b
Validation of remove arguments added here on Feb 2, 2014. Seems to be post-publishing :)
|
Saif Aljashamy |
Nov 06, 2015 |
| PDF |
Page 31
Under Removing Documents header |
> db.foo.remove()
should be:
db.foo.remove({})
Tested:
2015-11-06T19:07:20.571-0800 E QUERY Error: remove needs a query
at Error (<anonymous>)
at DBCollection._parseRemove (src/mongo/shell/collection.js:305:32)
at DBCollection.remove (src/mongo/shell/collection.js:328:23)
at (shell):1:8 at src/mongo/shell/collection.js:305
*https://github.com/mongodb/mongo/commit/a56fff30fbe28b90ad3526fb285dec078be72979#diff-ad54c6cd77e7be86c6ba069e15dd842b
Validation of remove arguments added on Feb 2, 2014. Seems to be post-publishing; technically not a mistake, I can't seem to select update.
|
Saif Aljashamy |
Nov 06, 2015 |
| PDF |
Page 37
the paragraph before 'Array Modifiers' |
s/Modifier "$inc" allowed numbers only/ Cannot increment with non-numeric argument: {"count" : "1"}/
|
Dimid Duchovny |
Jul 01, 2015 |
| Printed |
Page 39
1st paragraph |
The text shows:
> db.movies.find({"genre" : "horror"},
. . . {"push" : {"top10" : {
. . . "$each": ["Nightmare on Elm Street", "$Saw" ],
. . . "$slice": -10 }}})
When `update` should have been called on the collection, instead of `find`:
> db.movies.update({"genre" : "horror"},
. . . {"push" : {"top10" : {
. . . "$each": ["Nightmare on Elm Street", "$Saw" ],
. . . "$slice": -10 }}}
|
Brady Shutt |
Sep 17, 2016 |
| Printed |
Page 63
$elemMatch sample |
missing closing brace at the end of the query
db.test.find({"x" : {"$elemMatch" : {"$gt" : 10, "$lt" : 20}} } )
|
Miguel Ángel Ocaña Silva |
Dec 28, 2014 |
| PDF |
Page 63
3rd paragraph |
the first clause (it is greater than 10) NOT 25
|
Bertrand Greff |
Oct 05, 2015 |
| PDF |
Page 65
1st paragraph |
May be you can add that the result of the right query have to be empty.
|
Bertrand Greff |
Oct 05, 2015 |
| PDF |
Page 71
Code Segment |
The distribution of the returned documents won't be discretely uniform as the probability of each document getting fetched is determined by u(0,1) samples rather than a constant.
This would work (though I'm guessing there might be a race condition on calls to count() and inserts which might need to be addressed if rows are inserted concurrently):
db.people.insert({"name" : "joe", "random" : db.people.count()})
db.people.insert({"name" : "john", "random" : db.people.count()})
db.people.insert({"name" : "jim", "random" : db.people.count()})
var random = Math.floor(db.people.count()*Math.random())
...
result = db.foo.findOne({"random" : random})
|
Eric Vallee |
Sep 04, 2014 |
| Printed |
Page 120
2nd example |
it says the GeoJSON type is Line, but it should be LineString
"loc" : { "type" : "Line", ...}
|
Miguel Ángel Ocaña Siva |
Jan 03, 2015 |
| Printed, PDF, ePub |
Page 194
Figure 10-4 |
The "Op" numbers in the DC2 part of the diagram are inconsistent with the text and figure 10-5. The diagram should show that the database instances in DC2 have accepted writes up to number 131'.
|
Neil Smith |
Mar 11, 2015 |
| PDF |
Page 237
Command after last paragraph |
Chapter 13 Introduction to Sharding
Page 237 - Command after last paragraph
db.users.find({username: "user12345"}}).explain()
This above command includes extra closing curly brace
Expected: db.users.find({username: "user12345"}).explain()
|
Anilkumar Kalshetti |
Dec 01, 2015 |