dynamoid: encountering NoMethodError: undefined method `map' for nil:NilClass

I have a piece of code that sometimes throws the exception:

 NoMethodError: undefined method `map' for nil:NilClass

My code is this: MyModel.where(id: id)&.any? { ... }, where id is a GSI.

Any idea what might be the problem?

The stacktrace is below:

1
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3.rb" line 499 in block (2 levels) in query
2
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 35 in <<
3
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 35 in block (3 levels) in call
4
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 34 in tap
5
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 34 in block (2 levels) in call
6
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/middleware/limit.rb" line 42 in call
7
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/middleware/start_key.rb" line 14 in call
8
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/middleware/backoff.rb" line 15 in call
9
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 47 in block (3 levels) in call
10
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 46 in loop
11
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 46 in block (2 levels) in call
12
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 45 in catch
13
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3/query.rb" line 45 in block in call
14
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3.rb" line 497 in each
15
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3.rb" line 497 in each
16
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/adapter_plugin/aws_sdk_v3.rb" line 497 in block in query
17
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 546 in each
18
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 546 in each
19
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 546 in block in raw_pages_via_query
20
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 407 in each
21
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 407 in each
22
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 407 in each
23
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 407 in each
24
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 407 in each
25
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 407 in each
26
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 407 in each
27
File "/opt/rubies/ruby-2.5.9/lib/ruby/gems/2.5.0/gems/dynamoid-3.7.0/lib/dynamoid/criteria/chain.rb" line 407 in each
28
File "/var/app/current/app/models/client.rb", line 173 in any?

About this issue

Original URL
State: open
Created 3 years ago
Comments: 29 (13 by maintainers)

Most upvoted comments

Ah, right.

Please add require before configuring Dynamoid - the formatter is used only in Dynamoid’s specs and isn’t public:

require 'dynamoid/log/formatter'

andrykonchin on Nov 2, 2023

Just confirming what @mullermp said - I’ve reviewed the SDK’s client + connection pool + net:http client code and agree it should be thread safe and don’t see any potential threading issues that could cause this.

alextwoods on Oct 17, 2023

Yes, it seems so. DynamoDB Query response doesn’t contain the Items attribute.

I haven’t found in the DynamoDB documentation any statement that items/Items could be missing at all - it should be Array anyway. There is no any similar issue reported in the AWS Ruby SDK repository, so it isn’t a bug that was fixed. Will ask there a question. As a workaround we can treat items’ nil value as [] but it’s important to understand what happens and why.

andrykonchin on Sep 25, 2023